Dell POWERCONNECT 6200 SERIES Configuration Manual
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Dell POWERCONNECT 6200 SERIES Configuration Manual

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Dell™ PowerConnect™ 6200 Series

Configuration Guide

Model: PC6224, PC6248, PC6224P, PC6248P, and PC6224F
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Summary of Contents for Dell POWERCONNECT 6200 SERIES

  • Page 1: Configuration Guide

    Dell™ PowerConnect™ 6200 Series Configuration Guide Model: PC6224, PC6248, PC6224P, PC6248P, and PC6224F w w w . d e l l . c o m | s u p p o r t . d e l l . c o m...
  • Page 2 Reproduction of these materials in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden. Trademarks used in this text: Dell, the DELL logo, and PowerConnect are trademarks of Dell Inc. sFlow is a registered trademark of InMon Corporation.

  • Page 3: Table Of Contents

    Contents About this Document Organization ........Additional Documentation System Configuration Traceroute...
  • Page 4 Switching Configuration Virtual LANs ........VLAN Configuration Example CLI Examples Web Interface IP Subnet and MAC-Based VLANs...
  • Page 5 sFlow ........Overview .
  • Page 6 Device Security 802.1x Network Access Control 802.1x Network Access Control Examples 802.1X Authentication and VLANs Authenticated and Unauthenticated VLANs Guest VLAN ....... . CLI Examples Authentication Server Filter Assignment Access Control Lists (ACLs)
  • Page 7 ........When to Enable IP Multicast on the PowerConnect 6200 Series Switch IGMP Configuration .
  • Page 8 Utility ........Auto Config .

  • Page 9: About This Document

    About this Document This configuration guide provides examples of how to use the Dell™PowerConnect™ 6200 Series switch in a typical network. It describes the advantages of specific functions the PowerConnect 6200 Series switch provides and includes information about configuring those functions using the command line interface (CLI).

  • Page 10: Additional Documentation

    • from the command-line interface (CLI) for managing, monitoring, and configuring the switch. User’s Guide for your Dell PowerConnect switch describes the Web GUI. Many of the scenarios • described in this document can be fully configured using the Web interface. This guide also provides initial system setup and configuration instructions.

  • Page 11: System Configuration

    System Configuration This section provides configuration scenarios for the following features: • "Traceroute" on page 12 • "Configuration Scripting" on page 13 • "Outbound Telnet" on page 16 • "Simple Network Time Protocol (SNTP)" on page 17 • "Syslog" on page 20 •...

  • Page 12: Traceroute

    Traceroute Use Traceroute to discover the routes that packets take when traveling on a hop-by-hop basis to their destination through the network. • Maps network routes by sending packets with small Time-to-Live (TTL) values and watches the ICMP time-out announcements •...

  • Page 13: Configuration Scripting

    --More-- or (q)uit 64.233.174.99 250 ms Hop Count = 20 Last TTL = 30 Test attempt = 90 Test Success = 90 Configuration Scripting Configuration scripting allows you to generate a text-formatted script file that shows the current system configuration. You can generate multiple scripts and upload and apply them to more than one switch. Overview Configuration scripting: •...

  • Page 14: Cli Examples

    CLI Examples The following are examples of the commands used for configurations scripting. Example #1: Viewing the Script Options console#script ? apply Applies configuration script to the switch. delete Deletes a configuration script file from the switch. list Lists all configuration script files present on the switch. show Displays the contents of configuration script.
  • Page 15 Example #4: Copying the Active Configuration into a Script Use this command to capture the running configuration into a script. console#show running-config running-config.scr Config script created successfully. Example #5: Uploading a Configuration Script to the TFTP Server Use this command to upload a configuration script to the TFTP server. console#copy script abc.scr tftp://10.27.64.141/abc.scr Mode...

  • Page 16: Outbound Telnet

    exit configure logging web-session bridge aging-time 100 exit Configuration script validated. File transfer operation completed successfully. Example #7: Validating a Script console#script validate abc.scr ip address dhcp username "admin" password 16d7a4fca7442dda3ad93c9a726597e4 level 15 encrypted exit Configuration script 'abc.scr' validated. console#script apply abc.scr Are you sure you want to apply the configuration script? (y/n)y ip address dhcp username "admin"...

  • Page 17: Cli Examples

    The following are examples of the commands used in the outbound telnet feature. Example #1: Connecting to Another System by Using Telnet console#telnet 192.168.77.151 Trying 192.168.77.151... console# User:admin Password: (Dell PC62XX Routing) >enable Password: console#show ip interface Management Interface: IP Address... 10.27.65.89 Subnet Mask... 255.255.254.0 Default Gateway... 10.27.64.1 Burned In MAC Address...

  • Page 18: Cli Examples

    CLI Examples The following are examples of the commands used in the SNTP feature. Example #1: Viewing SNTP Options (Dell PC62XX Routing)(Config) #sntp ? console(config)#sntp ? authenticate authentication-key broadcast client server trusted-key unicast Example #2: Configuring the SNTP Server console(config)#sntp server ? ...
  • Page 19 Example #3: Viewing SNTP Information console#show sntp ? configuration status console#show sntp configuration Polling interval: 64 seconds MD5 Authentication keys: Authentication is not required for synchronization. Trusted keys: No trusted keys. Unicast clients: Enable Unicast servers: Server --------- ----------- 192.168.0.1 Disabled console#show sntp status Unicast servers:...

  • Page 20: Syslog

    Syslog Overview Syslog: • Allows you to store system messages and/or errors. • Can store to local files on the switch or a remote server running a syslog daemon. • Provides a method of collecting message logs from many systems. Interpreting Log Files Figure 2-1 describes the information that displays in log messages.
  • Page 21 Web Session Logging : disabled SNMP Set Command Logging : disabled 0 Messages were not logged. Buffer Log: <189> JAN 01 03:57:58 10.27.65.86-1 TRAPMGR[216282304]: traputil.c(908) 31 %% Instance 0 has elected a new STP root: 8000:00ff:f2a3:8888 <189> JAN 01 03:57:58 10.27.65.86-1 TRAPMGR[216282304]: traputil.c(908) 32 %% Instance 0 has elected a new STP root: 8000:0002:bc00:7e2c <189>...

  • Page 22: Port Description

    alert critical debug emergency error info notice warning console(Config-logging)#level critical Port Description The Port Description feature lets you specify an alphanumeric interface identifier that can be used for SNMP network management. CLI Example Use the commands shown below for the Port Description feature. Example #1: Enter a Description for a Port This example specifies the name “Test”...

  • Page 23: Storm Control

    Storm Control A traffic storm occurs when incoming packets flood the LAN resulting in network performance degradation. The Storm Control feature protects against this condition. The switch software provides broadcast, multicast, and unicast storm recovery for individual interfaces. Unicast Storm Control protects against traffic whose MAC addresses are not known by the system. For broadcast, multicast, and unicast storm control, if the rate of traffic ingressing on an interface increases beyond the configured threshold for that type, the traffic is dropped.
  • Page 24 Example #1: Set Broadcast Storm Control for an Interface console#configure console(config)#interface ethernet 1/g17 console(config-if-1/g17)#storm-control broadcast ? level console(config-if-1/g17)#storm-control broadcast level ? Enter the storm-control threshold as percent of port speed. Percent of port speed is converted to PacketsPerSecond based on 512 byte average packet size and applied to HW.

  • Page 25: Cable Diagnostics

    Cable Diagnostics This section describes: • "Copper Port Cable Test" on page 25 • "Fiber Port Cable Test" on page 27 NOTE: Cable Diagnostics is supported on SFP/XFP ports but not on the Stacking/CX-4/SFP+/10GbaseT ports. Copper Port Cable Test The cable test feature enables you to determine the cable connection status on a selected port. The switch uses Time Domain Reflectometry (TDR) technology to determine the quality and characteristics of a copper cable attached to a port.
  • Page 26 Example #1: Cable Test for Copper Ports console#test copper-port tdr 1/g1 Cable Status... Short Cable Length... 5m console#show copper-ports tdr Port Result Length [meters] ------- ------ --------------- 1/g1 Short 1/g2 Test has not been performed 1/g3 Test has not been performed 1/g4 Test has not been performed 1/g5...

  • Page 27: Fiber Port Cable Test

    Example #3: Show Last Time Domain Reflectometry Tests Use the show copper-ports tdr command in Privileged EXEC mode to display the last Time Domain Reflectometry (TDR) tests on specified ports. The following example displays the last TDR tests on all ports. console#show copper-ports tdr Port Result...
  • Page 28 System Configuration...

  • Page 29: Switching Configuration

    Switching Configuration This section provides configuration scenarios for the following features: • "Virtual LANs" on page 29 • "Voice VLAN" on page 37 • "IGMP Snooping" on page 40 • "IGMP Snooping Querier" on page 43 • "Link Aggregation/Port Channels" on page 45 •...

  • Page 30: Vlan Configuration Example

    • The IP-subnet Based VLAN feature lets you map IP addresses to VLANs by specifying a source IP address, network mask, and the desired VLAN ID. • The MAC-based VLAN feature let packets originating from end stations become part of a VLAN according to source MAC address.

  • Page 31: Cli Examples

    CLI Examples The following examples show how to create VLANs, assign ports to the VLANs, and assign a VLAN as the default VLAN to a port. Example #1: Create Two VLANs Use the following commands to create two VLANs and to assign the VLAN IDs while leaving the names blank.
  • Page 32 Example #3: Assign Ports to VLAN3 This example shows how to assign the ports that will belong to VLAN 3. Untagged frames will be accepted on ports 1/g19 and 1/g20. Note that port 1/g18 belongs to both VLANs and that port 1/g17 can never belong to VLAN 3. console(config)#interface ethernet 1/g18 cconsole(config-if-1/g18)#switchport general allowed vlan add 3 console(config-if-1/g18)#exit...

  • Page 33: Web Interface

    Example #6: View Information About VLAN 2 console#show ip interface vlan 2 Primary IP Address... 192.168.10.33/255.255.255.0 Routing Mode... Enable Administrative Mode... Enable Forward Net Directed Broadcasts... Disable Proxy ARP... Enable Local Proxy ARP... Disable Active State... Inactive Link Speed Data Rate... 10 Half MAC Address...

  • Page 34: Ip Subnet And Mac-Based Vlans

    IP Subnet and MAC-Based VLANs In addition to port-based VLANs, the switch also supports VLANs that are based on the IP address or MAC address of a host. With IP subnet and MAC-based VLANs, the VLAN membership is determined by the address of the host rather than the port to which the host is attached. CLI Examples The following examples show how to associate an IP subnet with a VLAN, a specific IP address with a VLAN, and a MAC address with a VLAN.

  • Page 35: Private Edge Vlans

    Example #4: Viewing IP Subnet and MAC-Based VLAN Associations console#show vlan association mac MAC Address VLAN ID ----------------- ------- 00FF.F2A3.8886 console#show vlan association subnet IP Subnet IP Mask ---------------- ---------------- 192.168.25.0 192.168.1.11 Private Edge VLANs Use the Private Edge VLAN feature to prevent ports on the switch from forwarding traffic to each other even if they are on the same VLAN.

  • Page 36: Cli Example

    CLI Example Example #1: Configuring a Protected Port The commands in this example name the protected port group 1 “PP_Test” and assign ports 1 and 2 to the group. console(config)#switchport protected 1 name PP_Test console(config)#interface ethernet 1/g17 console(config-if-1/g17)#switchport protected 1 console(config-if-1/g17)#exit console(config)#interface ethernet 1/g18 console(config-if-1/g18)#switchport protected 1...

  • Page 37: Voice Vlan

    Voice VLAN Voice VLAN enables switch ports to carry voice traffic with a defined priority in order to enable the separation of voice and data traffic coming onto the port. A primary benefit of using Voice VLAN is to ensure that the sound quality of an IP phone is safeguarded from deteriorating when the data traffic on the port is high.

  • Page 38: Interaction With Lldp-Med

    • When a dot1p priority is associated with the Voice VLAN port instead of a VLAN ID, then the priority information is passed onto the VOIP phone using the LLDP-MED mechanism. By this method, the voice data coming from the VOIP phone is tagged with VLAN 0 and with the exchanged priority; thus regular data arriving on the switch is given the default priority of the port (default 0), and the voice traffic is received with a higher priority.
  • Page 39 The PCs and printers are authenticated by 802.1X, but the phone might not support 802.1X authentication. The PowerConnect 6200 Series switches can allow unauthenticated traffic on the Voice VLAN for the phones that do not support authentication while requiring all other devices on the port to authenticate individually.

  • Page 40: Igmp Snooping

    IGMPv3 by default. CLI Examples In this example, the PowerConnect 6200 Series switch is a L2 switch with one non-default VLAN, VLAN 100. The three hosts are connected to ports that are members of VLAN 100, and IGMP snooping is enabled on VLAN 100.
  • Page 41 1. Create VLAN 100. console#configure console(config)#vlan database console(config-vlan)#vlan 2. Enable IGMP snooping on the VLAN. console(config-vlan)#ip igmp snooping 100 console(config-vlan)#exit 3. Forbid the forwarding of unregistered multicast addresses on VLAN 100 to prevent multicast flooding to ports if there are no "listeners." console(config)#interface vlan 100 console(config-if-vlan100)#bridge multicast forbidden forward-unregistered...
  • Page 42 9. View information about the IGMP snooping configuration. console#show ip igmp snooping Admin Mode... Enable Multicast Control Frame Count... 0 Interfaces Enabled for IGMP Snooping... None Vlans enabled for IGMP snooping... 100 In this example, Host A sends a join message for group 225.1.1.1. Host B sends a join message for group 225.1.1.2.

  • Page 43: Igmp Snooping Querier

    Multicast Packets Received... 626494 Broadcast Packets Received... 0 console#show statistics ethernet 1/g10 Total Packets Received Without Errors... 12 Unicast Packets Received... 0 Multicast Packets Received... 12 Broadcast Packets Received... 0 IGMP Snooping Querier When PIM and IGMP are enabled in a network with IP multicast routing, the IP multicast router acts as the IGMP querier.
  • Page 44 Example #2: Configure IGMP Snooping Querier Properties The first command in this example sets the IGMP Querier Query Interval time to 100. This means that the switch waits 100 seconds before sending another general query. The second command sets the IGMP Querier timer expiration period to 100.

  • Page 45: Link Aggregation/Port Channels

    Example #5: Show IGMP Snooping Querier Information for VLAN 10 console#show ip igmp snooping querier vlan 10 Vlan 10 IGMP Snooping querier status ---------------------------------------------- IGMP Snooping Querier Vlan Mode... Enable Querier Election Participate Mode... Enable Querier Vlan Address... 10.10.11.40 Operational State... Querier Operational version...

  • Page 46: Cli Example

    CLI Example The following shows an example of configuring the software to support Link Aggregation (LAG) to a server and to a Layer 3 switch. Figure 3-3 shows the example network. Server Subnet Port 1/g19 Port 1/0/3 Port 1/g18 LAG_1 LAG_10 Port 1/0/2 LAG_1...
  • Page 47 Example 1: Create Names for Two Port-Channels console#configure console(config)#interface port-channel 1 console(config-if-ch1)#description lag_1 console(config-if-ch1)#exit console(config)#interface port-channel 2 console(config-if-ch2)#description lag_2 console(config-if-ch2)#exit Example 2: Add the Physical Ports to the Port-Channels console(config)#interface ethernet 1/g18 console(config-if-1/g18)#channel-group 1 mode auto console(config-if-1/g18)#exit console(config)#interface ethernet 1/g19 console(config-if-1/g19)#channel-group 1 mode auto console(config-if-1/g19)#exit console(config)#interface ethernet 1/g23...

  • Page 48: Web Interface Configuration: Lags/Port-Channels

    No Configured Ports No Configured Ports No Configured Ports No Configured Ports No Configured Ports No Configured Ports No Configured Ports No Configured Ports ch10 No Configured Ports ch11 No Configured Ports ch12 No Configured Ports ch13 No Configured Ports ch14 No Configured Ports ch15...

  • Page 49: Port Mirroring

    Port Mirroring This section describes the Port Mirroring feature, which can serve as a diagnostic tool, debugging tool, or means of fending off attacks. Overview Port mirroring selects network traffic from specific ports for analysis by a network analyzer, while allowing the same traffic to be switched to its destination.

  • Page 50: Port Security

    Port Security This section describes the Port Security feature. Overview Port Security: • Allows for limiting the number of MAC addresses on a given port. • Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted.

  • Page 51: Cli Examples

    CLI Examples The following are examples of the commands used in the Port Security feature. Example #1: Enable Port Security on an Interface console(config)#interface ethernet 1/g18 console(config-if-1/g18)#port security ? discard learned trap console(config-if-1/g18)#port security Example #2: Show Port Security console#show ports security ? addresses ethernet...

  • Page 52: Link Layer Discovery Protocol

    Link Layer Discovery Protocol The Link Layer Discovery Protocol (LLDP) feature allows individual interfaces on the switch to advertise major capabilities and physical descriptions. Network managers can view this information and identify system topology and detect bad configurations on the LAN. LLDP has separately configurable transmit and receive functions.
  • Page 53 Example #3: Show Global LLDP Parameters console#show lldp LLDP Global Configuration Transmit Interval... 30 seconds Transmit Hold Multiplier... 8 Reinit Delay... 5 seconds Notification Interval... 1000 seconds Example #4 Show Interface LLDP Parameters console#show lldp interface 1/g10 LLDP Interface Configuration Interface Link Transmit...

  • Page 54: Denial Of Service Attack Protection

    Protects against the exploitation of a number of vulnerabilities which would make the host or network unstable • Compliant with Nessus. Dell tested the switch software with Nessus version 2.0.10. Nessus is a widely- used vulnerability assessment tool. • PowerConnect 6200 Series software provides a number of features that help a network administrator protect networks against DoS attacks.

  • Page 55: Cli Examples

    Table 3-1 describes the dos-control keywords. Table 3-1. DoS Control Keyword Meaning firstfrag Enabling First Fragment DoS prevention causes the switch to drop packets that have a TCP header smaller then the configured Min TCP Hdr Size. icmp ICMP DoS prevention causes the switch to drop ICMP packets that have a type set to ECHO_REQ (ping) and a size greater than the configured ICMP Pkt Size.

  • Page 56: Dhcp Snooping

    Example #2: Viewing the DoS Configuration Information console#show dos-control SIPDIP Mode... Enable First Fragment Mode... Enable Min TCP Hdr Size... 20 TCP Fragment Mode... Enable TCP Flag Mode... Disable L4 Port Mode... Enable ICMP Mode... Enable Max ICMP Pkt Size... 512 DHCP Snooping Dynamic Host Configuration Protocol (DHCP) Snooping is a security feature that monitors DHCP messages between a DHCP client and DHCP server to:...
  • Page 57 The hardware rate limits DHCP packets sent to the CPU from interfaces to 64 Kbps. The DHCP snooping application processes incoming DHCP messages. For DHCPRELEASE and DHCPDECLINE messages, the application compares the receive interface and VLAN with the client interface and VLAN in the bindings database. If the interfaces do not match, the application logs the event and drops the message.
  • Page 58 DISCOVER, REQUEST Tentative binding Figure 3-4. DHCP Binding The DHCP snooping component does not forward server messages since they are forwarded in hardware. DHCP snooping forwards valid DHCP client messages received on un-trusted interfaces to all trusted interfaces within the VLAN. The binding's database includes the following information for each entry: •...

  • Page 59: Cli Examples

    CLI Examples The commands below show examples of configuring DHCP Snooping for the switch and for individual interfaces. Example #1 Enable DHCP snooping for the switch console(config)#ip dhcp snooping console(config)#exit console# Example #2 Enable DHCP snooping on a VLAN console(config)#ip dhcp snooping vlan 1 console(config)#exit console# Example #3 Enable DHCP snooping's Source MAC verification...
  • Page 60 console(config)# console(config)#exit Example #6 Configure DHCP snooping database Persistency interval console(config)#ip dhcp snooping database write-delay 500 console(config)# console(config)#exit Example #7 Configure an interface as DHCP snooping trusted console(config-if-1/g1)#ip dhcp snooping trust console(config-if-1/g1)#exit Example #8 Configure rate limiting on an interface console(config-if-1/g1)#ip dhcp snooping limit rate 50 burst interval 1 console(config-if-1/g1)#exit Example #9 Configure a DHCP snooping static binding entry...
  • Page 61 Example #10 Show DHCP Snooping configuration on VLANs and Ports show ip dhcp snooping binding DHCP snooping is Enabled DHCP snooping source MAC verification is enabled DHCP snooping is enabled on the following VLANs: Interface Trusted ----------- ---------- 1/g1 1/g2 1/g3 1/g4 1/g5...
  • Page 62 ----------- ---------- 1/g15 1/g16 1/g17 1/g18 1/g19 1/g20 1/g21 1/g22 1/g23 1/g24 1/xg3 1/xg4 --More-- or (q)uit console# Switching Configuration ----------------...
  • Page 63 Example #12 Show DHCP Snooping database configurations console#show ip dhcp snooping database agent url: local write-delay: console# Example #13 Show DHCP Snooping binding entries Total number of bindings: MAC Address IP Address ----------------- --------------- 00:01:02:03:04:05 10.131.11.1 00:02:B3:06:60:80 10.131.11.3 Example #14 Show DHCP Snooping Per Port rate limiting configurations show ip dhcp snooping interfaces Interface Trust State...
  • Page 64 1/g3 1/g4 1/g5 1/g6 1/g7 1/g8 1/g9 1/g10 1/g11 1/g12 1/g13 1/g14 1/g15 1/g16 1/g17 1/g18 --More-- or (q)uit 1/g19 1/g20 1/g21 1/g22 1/g23 1/g24 1/xg3 1/xg4 Switching Configuration...
  • Page 65 ch10 --More-- or (q)uit console# Example #15 Show DHCP Snooping Per Port Statistics console#show ip dhcp snooping statistics Interface MAC Verify Failures ----------- ---------- 1/g2 1/g3 1/g4 1/g5 1/g6 1/g7 1/g8 1/g9 1/g10 Client Ifc DHCP Server Mismatch Msgs Rec'd ---------- ----------- Switching Configuration...
  • Page 66 1/g11 1/g12 1/g13 1/g14 1/g15 1/g16 1/g17 1/g18 1/g19 1/g20 --More-- or (q)uit 1/g21 1/g22 1/g23 1/g24 1/xg3 1/xg4 ch10 ch11 ch12 Switching Configuration...

  • Page 67: Sflow

    ch13 ch14 ch15 ch16 ch17 --More-- or (q)uit sFlow This section describes the sFlow feature. sFlow is the industry standard for monitoring high-speed switched and routed networks. sFlow technology is built into network equipment and gives complete visibility into network activity, enabling effective management and control of network resources. Overview As illustrated in Figure 3-5, the sFlow monitoring system consists of sFlow Agents (embedded in a switch, router, or standalone probe) and a central sFlow Collector.

  • Page 68: Sflow Agents

    The advantages of using sFlow are: • It is possible to monitor all ports of the switch continuously, with no impact on the distributed switching performance. • Minimal memory/CPU is required. Samples are not aggregated into a flow-table on the switch; they are forwarded immediately over the network to the sFlow collector.

  • Page 69: Cli Examples

    The mechanism involves a counter that is decremented with each packet. When the counter reaches zero a sample is taken. 5. When a sample is taken, the counter indicating how many packets to skip before taking the next sample is reset. The value of the counter is set to a random integer where the sequence of random integers used over time is the Sampling Rate.
  • Page 70 Example #4: Show the sFlow configuration for receiver index 1 console#show sflow 1 destination Receiver Index... 1 Owner String... site77 Time out... 1529 IP Address:... 30.30.30.1 Address Type... 1 Port... 560 Datagram Version... 5 Maximum Datagram Size... 500 Example #5: Show sFlow sampling for receiver index 1 console#show sflow 1 sampling Sampler Receiver...
  • Page 71 Example #6: Show sFlow polling for receiver index 1 console#show sflow 1 polling Poller Receiver Data Source Index ----------- ------- 1/g1 1/g2 1/g3 1/g4 1/g5 1/g6 1/g7 1/g8 1/g9 1/g10 1/g15 Poller Interval ------- Switching Configuration...
  • Page 72 Switching Configuration...

  • Page 73: Routing Configuration

    Routing Configuration This section describes configuration scenarios and instructions for the following routing features: • "VLAN Routing" on page 74 • "Virtual Router Redundancy Protocol" on page 77 • "Proxy Address Resolution Protocol (ARP)" on page 80 • "OSPF" on page 81 •...

  • Page 74: Vlan Routing

    VLAN Routing This section provides an example of how to configure PowerConnect 6200 Series software to support VLAN routing. NOTE: The management VLAN cannot be configured as a routing interface. The switch may also be managed via VLAN routing interfaces.
  • Page 75 console(config-vlan)#vlan 10 console(config-vlan)#vlan 20 console(config-vlan)#exit Example 2: Configure the VLAN Members The following code sequence shows an example of adding ports to the VLANs and assigning the PVID for each port. The PVID determines the VLAN ID assigned to untagged frames received on the ports. console#configure console(config)#interface ethernet 1/g1 console(config-if-1/g1)#switchport mode general...

  • Page 76: Using The Web Interface To Configure Vlan Routing

    Example 3: Set Up VLAN Routing for the VLANs and Assign an IP Address The following code sequence shows how to enable routing for the VLANs and how to configure the IP addresses and subnet masks for the virtual router ports.: console#configure console(config)#interface vlan 10 console(config-if-vlan10)#routing...

  • Page 77: Virtual Router Redundancy Protocol

    Virtual Router Redundancy Protocol When an end station is statically configured with the address of the router that will handle its routed traffic, a single point of failure is introduced into the network. If the router goes down, the end station is unable to communicate.
  • Page 78 Configuring VRRP on the Switch as a Master Router 1 Enable routing for the switch. IP forwarding is then enabled by default. console#config console(config)#ip routing 2 Configure the IP addresses and subnet masks for the VLAN routing interface that will participate in the protocol: console(config)#interface vlan 50 console(config-if-vlan50)#ip address 192.150.2.1 255.255.255.0...

  • Page 79: Using The Web Interface To Configure Vrrp

    4 Assign virtual router ID to the interface that will participate in the protocol: console(config)#interface vlan 50 console(config-if-vlan50)#ip vrrp 20 5 Specify the IP address that the virtual router function will recognize. console(config-if-vlan50)#ip vrrp 20 ip 192.150.2.1 6 Set the priority for the interface. Assigning a lower priority value than the interface on the other router ensures that this interface the backup.

  • Page 80: Proxy Address Resolution Protocol (Arp)

    Proxy Address Resolution Protocol (ARP) This section describes the Proxy Address Resolution Protocol (ARP) feature. Overview • Proxy ARP allows a router to answer ARP requests where the target IP address is not the router itself but a destination that the router can reach. •...

  • Page 81: Ospf

    Active State... Inactive Link Speed Data Rate... 10 Half MAC Address... 00FF.F2A3.888A Encapsulation Type... Ethernet IP MTU... 1500 OSPF Larger networks typically use the Open Shortest Path First (OSPF) protocol instead of RIP . To the administrator of a large and/or complex network, OSPF offers several benefits: •...
  • Page 82 virtual link can be used to connect an area to Area 0 when a direct link is not possible. A virtual link traverses an area between the remote area and Area 0 (see Figure 4-5). stub area is an area that does not receive routes that were learned from a protocol other than OSPF or were statically configured.

  • Page 83: Cli Examples

    External routes are those imported into OSPF from other routing protocol or processes. OSPF computes the path cost differently for external type 1 and external type 2 routes. The cost of an external type 1 route is the cost advertised in the external LSA plus the path cost from the calculating router to the ASBR.
  • Page 84 IPv4 (OSPFv2) • Enable routing for the switch: console#config ip routing exit Enable routing and assign IP for VLANs 70, 80 and 90. config interface vlan 70 routing ip address 192.150.2.2 255.255.255.0 exit interface vlan 80 routing ip address 192.130.3.1 255.255.255.0 exit interface vlan 90 routing...
  • Page 85 IPv4 (OSPFv2) config interface vlan 70 ip ospf area 0.0.0.0 ip ospf priority 128 ip ospf cost 32 exit interface vlan 80 ip ospf area 0.0.0.2 ip ospf priority 255 ip ospf cost 64 exit interface vlan 90 ip ospf area 0.0.0.2 ip ospf priority 255 ip ospf cost 64 exit...
  • Page 86 Area 1 (0.0.0.1) - Stub IR (5.3.0.0) VLAN 10 10.1.2.2/24 3000:1:2::/64 eui64 Figure 4-4. OSPF Configuration—Stub Area and NSSA Area Configure Router A: Router A is a backbone router. It links to an ASBR (not defined here) that routes traffic outside the AS. •...
  • Page 87 ipv6 address 3000:3:100::/64 eui64 ip ospf area 0.0.0.0 ipv6 ospf exit • Define an OSPF router: ipv6 router ospf router-id 3.3.3.3 exit router ospf router-id 3.3.3.3 exit exit Configure Router B: Router B is a ABR that connects Area 0 to Areas 1 and 2. •...
  • Page 88 • For IPv4: Define an OSPF router. Define Area 1 as a stub. Enable OSPF for IPv4 on VLANs 10, 5, and 17 by globally defining the range of IP addresses associated with each interface, and then associating those ranges with Areas 1, 0, and 17, respectively. Then, configure a metric cost to associate with static routes when they are redistributed via OSPF: router ospf router-id 2.2.2.2...
  • Page 89 Example 3: Configuring a Virtual Link In this example, Area 0 connects directly to Area 1. A virtual link is defined that traverses Area 1 and connects to Area 2. Figure 4-5 illustrates this example OSPF configuration. Area 2 (0.0.0.2) IR (5.3.0.0) 10.1.101.1 VLAN 11...
  • Page 90 router ospf router-id 3.3.3.3 network 10.2.3.0 0.0.0.255 area 0.0.0.0 exit exit Configure Router B: Router B is a ABR that directly connects Area 0 to Area 1. In addition to the configuration steps described in the previous example, we define a virtual link that traverses Area 1 to Router C (5.5.5.5).
  • Page 91 routing ip address 10.1.2.1 ipv6 address 3000:1:2::/64 eui64 ipv6 ospf ipv6 ospf areaid 1 exit interface vlan 11 routing ip address 10.1.101.1 255.255.255.0 ipv6 address 3000:1:101::/64 eui64 ipv6 ospf ipv6 ospf areaid 2 exit ipv6 router ospf router-id 5.5.5.5 area 0.0.0.1 virtual-link 4.4.4.4 exit router ospf router-id 5.5.5.5...

  • Page 92: Routing Information Protocol

    The routing table is sent to a multicast address, reducing network traffic – An authentication method is used for security The PowerConnect 6200 Series supports both versions of RIP. You may configure a given port: • To receive packets in either or both formats •...

  • Page 93: Cli Examples

    CLI Examples The configuration commands used in the following example enable RIP on ports vlan 2 and vlan 3 as shown in the network illustrated in Figure 4-6. Layer 3 Switch acting as a router Figure 4-6. Port Routing Example Network Diagram Example #1: Enable Routing for the Switch The following sequence enables routing for the switch: console#config...

  • Page 94: Using The Web Interface To Configure Rip

    Example #3. Enable RIP for the Switch The next sequence enables RIP for the switch. The route preference defaults to 15. console#config router rip enable exit exit Example #4. Enable RIP for the VLAN Routing Interfaces This command sequence enables RIP for VLAN 2 and VLAN 3. Authentication defaults to none, and no default route entry is created.

  • Page 95: Route Preferences

    The PowerConnect 6200 Series switch enables you to identify the preferred route type by assigning an administrative preference value to each type. The values are arbitrary (1 to 255); however, a route type that has a lower value is preferred over higher-value types.
  • Page 96 Example 1: Configure Administrative Preferences The following commands configure the administrative preference for the RIP and OSPF: console#Config router rip distance rip 130 exit For OSPF, an additional parameter identifies the type of OSPF route that the preference value applies to: router ospf distance ospf ? external...

  • Page 97: Using Equal Cost Multipath

    Using Equal Cost Multipath The equal cost multipath (ECMP) feature allows a router to use more than one next hop to forward packets to a given destination prefix. It can be used to promote a more optimal use of network resources and bandwidth.
  • Page 98 Routing protocols can also be configured to compute ECMP routes. For example, referring to Figure 4-8, if OSPF were configured in on both links connecting Router A and Router B, and if Router B advertised its connection to 20.0.0.0/8, then Router A could compute an OSPF route to 20.0.0.0/8 with next hops of 10.1.1.2 and 10.1.2.2.

  • Page 99: Loopback Interfaces

    Loopback Interfaces PowerConnect 6200 Series software provides for the creation, deletion, and management of loopback interfaces. A loopback interface is a software-only interface that is not associated with a physical location; as such it is not dependent on the physical status of a particular router interface and is always considered “up” as long as the router is running.

  • Page 100: Ip Helper

    IP MTU... 1500 Bandwidth... 100000 kbps Destination Unreachables... Enabled ICMP Redirects... Enabled To delete a loopback interface, enter the following command from the Global Config mode: console(config)#no interface loopback 0 console(config)# IP Helper The IP Helper feature provides the ability for a router to forward configured UDP broadcast packets to a particular IP address.
  • Page 101 Table 4-1. Default Ports - UDP Port Numbers Implied By Wildcard Protocol IEN-116 Name Service NetBIOS Name Server NetBIOS Datagram Server TACACS Server Time Service DHCP Trivial File Transfer Protocol The switch limits the number of relay entries to four times the maximum number of VLAN routing interfaces (512 relay entries).

  • Page 102: Cli Examples

    The relay agent only relays packets that meet the following conditions: • The destination MAC address must be the all-ones broadcast address (FF:FF:FF:FF:FF:FF). • The destination IP address must be the limited broadcast address (255.255.255.255) or a directed broadcast address for the receive interface. •...
  • Page 103 Example 5: Enable IP Helper on a VLAN Routing Interface to a Server (DHCP and DNS) To relay DHCP and DNS packets to 192.168.30.1, use the following commands: console(config-if-vlan100)#ip helper-address 192.168.30.1 dhcp console(config-if-vlan100)#ip helper-address 192.168.30.1 domain Example 6: Enable IP Helper on Multiple VLAN Routing Interfaces With the following configuration, the relay agent relays: •...
  • Page 104 Example 7: Show IP Helper Configurations The following command shows IP Helper configurations: console#show ip helper-a IP helper is enabled Interface -------------------- ----------- ---------- ---------- ------------------ vlan 100 vlan 100 vlan 200 vlan 200 vlan 300 vlan 300 Example 8: Show IP Helper Statistics The following command shows IP Helper configurations: console#show ip helper statistics DHCP client messages received...

  • Page 105: Device Security

    Device Security This section describes configuration scenarios for the following features: • "802.1x Network Access Control" on page 106 • "802.1X Authentication and VLANs" on page 109 • "Authentication Server Filter Assignment" on page 111 • "Access Control Lists (ACLs)" on page 111 •...

  • Page 106: 802.1X Network Access Control

    LANs. The PowerConnect 6200 Series switch achieves access control by enforcing authentication of supplicants that are attached to an authenticator’s controlled ports. The result of the authentication process determines whether the supplicant is authorized to access services on that controlled port.
  • Page 107 Figure 5-1. Switch with 802.1x Network Access Control If a user, or supplicant, attempts to communicate via the switch on any interface except interface 1/g1, the system challenges the supplicant for login credentials. The system encrypts the provided information and transmits it to the RADIUS server. If the RADIUS server grants access, the system sets the 802.1x port state of the interface to authorized and the supplicant is able to access network resources.
  • Page 108 Example #2: MAC-Based Authentication Mode The PowerConnect 6200 Series switches support MAC-based 802.1X authentication. This feature allows multiple hosts to authenticate on a single port. The hosts are distinguished by their MAC addresses. When multiple hosts (for example, a PC, a printer, and a phone in the same office) are connected to the switch on the same port, each of the connected hosts authenticates separately with the RADIUS server.

  • Page 109: 802.1X Authentication And Vlans

    802.1X Authentication and VLANs The PowerConnect 6200 Series switches allow a port to be placed into a particular VLAN based on the result of type of 802.1X authentication a client uses when it accesses the switch. The RADIUS server or IEEE 802.1X Authenticator can provide information to the switch about which VLAN to assign the host...

  • Page 110: Cli Examples

    VLAN and the port is moved to the authorized state, allowing access to the client. However, if the port is in MAC-based 802.1X authentication mode, it will not move to the authorized state. MAC-based mode makes it possible for both authenticated and guest clients to use the same port at the same time. Client devices that are 802.1X-supplicant-enabled authenticate with the switch when they are plugged into the 802.1X-enabled switch port.

  • Page 111: Authentication Server Filter Assignment

    Authentication Server Filter Assignment The PowerConnect 6200 Series switches allow the external 802.1X Authenticator or RADIUS server to assign DiffServ policies to users that authenticate to the switch. When a host (supplicant) attempts to connect to the network through a port, the switch contacts the 802.1X authenticator or RADIUS server, which then provides information to the switch about which DiffServ policy to assign the host (supplicant).
  • Page 112 You can configure mirror or redirect attributes for a given ACL rule, but not both. • The PowerConnect 6200 Series switch supports a limited number of counter resources, so it may not be possible to log every ACL rule. You can define an ACL with any number of logging rules, but the number of rules that are actually logged cannot be determined until the ACL is applied to an interface.

  • Page 113: Mac Acls

    Egress ACL Limitations Egress ACLs have some additional limitations. The following limitations apply to egress ACLs only: • Egress ACLs support IP Protocol/Destination, IP Address Source/Destination, L4 Source/Destination port, IP DSCP, IP ToS, and IP precedence match conditions only. • MAC ACLs are not supported in the egress direction.

  • Page 114: Ip Acls

    IP ACLs IP ACLs classify for Layers 3 and 4. Each ACL is a set of up to ten rules applied to inbound traffic. Each rule specifies whether the contents of a given field should be used to permit or deny access to the network, and may apply to one or more of the following fields within a packet: •...

  • Page 115: Ip Acl Cli Example

    UDP traffic. The content of the two rules is the same. TCP and UDP packets will only be accepted by the PowerConnect 6200 Series switch if the source and destination stations have IP addresses that fall within the defined sets.

  • Page 116: Configuring A Mac Acl

    Step 1: Create an ACL and Define an ACL Rule This command creates an ACL named list1 and configures a rule for the ACL. After the mask has been applied, it permits packets carrying TCP traffic that matches the specified Source IP address, and sends these packets to the specified Destination IP address.

  • Page 117: Radius

    Step 4: Viewing the MAC ACL Information console#show mac access-lists Current number of all ACLs: 2 Maximum number of all ACLs: 100 MAC ACL Name ------------------------------- ----- ------------------------- --------- mac1 console#show mac access-lists mac1 MAC ACL Name: mac1 Rule Number: 1 Action...

  • Page 118: Radius Configuration Examples

    attributes containing configuration information. If the server rejects the user, it returns a negative result. If the server rejects the client or the shared “secrets” differ, the server returns no result. If the server requires additional verification from the user, it returns a challenge, and the request process begins again. If you use a RADIUS server to authenticate users, you must configure user attributes in the user database on the RADIUS server.
  • Page 119 Figure 5-3. RADIUS Servers in a Network When a user attempts to log in, the switch prompts for a username and password. The switch then attempts to communicate with the primary RADIUS server at 10.10.10.10. Upon successful connection with the server, the login credentials are exchanged over an encrypted channel. The server grants or denies access, which the switch honors, and either allows or does not allow the user to access the switch.

  • Page 120: Tacacs

    Example #2: Set the NAS-IP Address for the RADIUS Server The NAS-IP address attribute identifies the IP Address of the network authentication server (NAS) that is requesting authentication of the user. The address should be unique to the NAS within the scope of the RADIUS server.
  • Page 121 Figure 5-4. PowerConnect 6200 Series Switch with TACACS+ When a user attempts to log into the switch, the NAS or switch prompts for a username and password. The switch attempts to communicate with the highest priority configured TACACS+ server at 10.10.10.10.

  • Page 122: Mac Authentication Bypass (Mab)

    802.1x MAC Authentication Bypass (MAB) MAB is a supplemental authentication mechanism that allows 802.1x unaware clients, such as printers and fax machines, to authenticate to the network using the client MAC address as an identifier. The known and allowable MAC address and corresponding access rights of the client must be pre-populated in the authentication server.

  • Page 123: Cli Examples

    Client Traffic from unknown client, Learn MAC EAPOL Request (Identity) D=01.80.c2.00.00.03 EAPOL Request (Identity) D=01.80.c2.00.00.03 (30 seconds) EAPOL Request (Identity) D=01.80.c2.00.00.03 (30 seconds) EAPOL Timeout – Initiate MAB (30 seconds) Client Authentication Figure 5-5. MAB Operation – Authentications Based on MAC Address in Database CLI Examples Example 1: Enable/Disable MAB To enable/disable MAB on interface 1/5, use the following commands:...
  • Page 124 Example 2: Show MAB Configuration To show the MAB configuration for interface 1/5, use the following command: console#show dot1x ethernet 1/g5 Administrative Mode... Enabled Port Admin Mode ------- ------------------ 1/g5 mac-based Quiet Period... 60 Transmit Period... 30 Maximum Requests... 2 Max Users...

  • Page 125: Captive Portal

    Captive Portal Overview Captive Portal feature is a software implementation that allows client access only on user verification. Verification can be configured to allow access for guest and authenticated users. Users must be validated against a database of authorized captive portal users locally or through a radius client. The Authentication server supports both HTTP and HTTPS web connections.

  • Page 126: Captive Portal Configuration, Status And Statistics

    In the unknown state, the CP doesn't redirect HTTP/S traffic to the switch, but queries the switch to determine whether the client is authenticated or unauthenticated. In the Unauthenticated state, the CP directs the HTTP/S traffic to the switch to allow the client to authenticate with the switch.
  • Page 127 All new captive portal instances are also assigned to the "Default" group. The administrator can create new groups and modify the user/group association to only allow a subset of users access to a specific captive portal instance. Network access is granted upon successful verification of user credentials. A remote RADIUS server can be used for client authentication.

  • Page 128: Captive Portal Status

    Customization of Captive Portal web pages is accomplished using the Web UI and is not available by using the CLI. Figure 5-6. PowerConnect 6200 Series Switch with TACACS+ The administrator can download and configure image files for branding purposes. Each image must first be copied onto the switch;...

  • Page 129: Captive Portal Statistics

    Captive Portal Statistics Client session statistics are available for both guest and authenticated users.Client statistics are used to enforce the idle timeout and other limits configured for the user and captive portal instance. Client statistics may not be cleared by the administrator since this would affect the ability to monitor the configured limits.
  • Page 130 console#show captive-portal Administrative Mode... Enabled Operational Status... Enabled Disable Reason... Administrator Disabled Captive Portal IP Address... 1.2.3.4 Example 6: Show Captive Portal Instances To show the status of all Captive Portal instances in the system, use the following command: console#show captive-portal status Additional HTTP Port...
  • Page 131 Example 7: Modify the Default Captive Portal Configuration (Change Verification Method to Local) To change the verification method to local, use the following command: console(config-CP 1)#verification local To view the configuration change, use the following command: console#show captive-portal configuration 1 status CP ID...
  • Page 132 To create a local user, use the following command: console(Config-CP)#user 1 name user1 console(config-CP)#user 1 password Enter password (8 to 64 characters): ******** Re-enter password: ******** console(Config-CP)#user 1 session-timeout 14400 To verify the creation of a local user, use the following command: console#show captive-portal user User ID User Name...
  • Page 133 Interface Interface Description --------- ---------------------------------------- ------------ ----------- 1/g18 Unit: 1 Slot: 0 Port: 18 Gigabit - Level Disabled To view the status of a captive client (connected to 1/g18), use the following command: console#show captive-portal configuration 1 client status CP ID... 1 CP Name...
  • Page 134 Device Security...

  • Page 135: Ipv6

    OSPFv2 scenarios in "OSPF" on page 81. Interface Configuration In PowerConnect 6200 Series software, IPv6 coexists with IPv4. As with IPv4, IPv6 routing can be enabled on physical and VLAN interfaces. Each L3 routing interface can be used for IPv4, IPv6, or both.

  • Page 136: Cli Example

    • Allocated from part of the IPv6 unicast address space • Not visible off the local link • Not globally unique Next hop addresses computed by routing protocols are usually link-local. During a transition period, a global IPv6 Internet backbone may not be available. The solution of this is to tunnel IPv6 packets inside IPv4 to reach remote IPv6 islands.
  • Page 137 ip ospf area 0.0.0.0 exit interface vlan 2 routing ipv6 enable ipv6 address 2020:1::1/64 ipv6 ospf ipv6 ospf network point-to-point exit interface tunnel 0 ipv6 address 2001::1/64 tunnel mode ipv6ip tunnel source 20.20.20.1 tunnel destination 10.10.10.1 ipv6 ospf ipv6 ospf network point-to-point exit interface loopback 0 ip address 1.1.1.1 255.255.255.0...
  • Page 138 ipv6 address 2020:2::2/64 ipv6 ospf ipv6 ospf network point-to-point exit interface tunnel 0 ipv6 address 2001::2/64 tunnel mode ipv6ip tunnel source 10.10.10.1 tunnel destination 20.20.20.1 ipv6 ospf ipv6 ospf network point-to-point exit interface loopback 0 ip address 2.2.2.2 255.255.255.0 exit exit IPv6...

  • Page 139: Quality Of Service

    Quality of Service This section includes the following subsections: • "Class of Service Queuing" on page 139 • "Differentiated Services" on page 143 Class of Service Queuing The Class of Service (CoS) feature lets you give preferential treatment to certain types of traffic over others.

  • Page 140: Egress Port Configuration-Traffic Shaping

    CoS Mapping Table for Trusted Ports Mapping is from the designated field values on trusted ports’ incoming packets to a traffic class priority (actually a CoS traffic queue). The trusted port field-to-traffic class configuration entries form the Mapping Table the switch uses to direct ingress packets from trusted ports to egress queues. Egress Port Configuration—Traffic Shaping For unit/slot/port interfaces, you can specify the shaping rate for the port (in Kbps), which is an upper limit of the transmission bandwidth used.
  • Page 141 packet A UserPri=3 packet B UserPri=7 packet C (untagged) packet D UserPri=6 Figure 7-1. CoS Mapping and Queue Configuration Continuing this example, you configured the egress Port 1/g8 for strict priority on queue 6, and a set a weighted scheduling scheme for queues 5-0. Assuming queue 5 has a higher weighting than queue 1 (relative weight values shown as a percentage, with 0% indicating the bandwidth is not guaranteed), the queue service order is 6 followed by 5 followed by 1.
  • Page 142 Figure 7-2. CoS1/g Configuration Example System Diagram You will configure the ingress interface uniquely for all cos-queue and VLAN parameters. console#config interface ethernet 1/g10 classofservice trust dot1p classofservice dot1p-mapping 6 3 vlan priority 2 exit interface ethernet 1/g8 cos-queue min-bandwidth 0 0 5 5 10 20 40 cos-queue strict 6 exit exit...

  • Page 143: Differentiated Services

    As implemented in PowerConnect 6200 Series software, DiffServ allows you to control what traffic is accepted and what traffic is discarded.

  • Page 144: Cli Example

    CLI Example This example shows how a network administrator can provide equal access to the Internet (or other external network) to different departments within a company. Each of four departments has its own Class B subnet that is allocated 25% of the available bandwidth on the port accessing the Internet. Figure 7-3.
  • Page 145 match srcip 172.16.20.0 255.255.255.0 exit class-map match-all test_dept match srcip 172.16.30.0 255.255.255.0 exit class-map match-all development_dept match srcip 172.16.40.0 255.255.255.0 exit Create a DiffServ policy for inbound traffic named internet_access, adding the previously created department classes as instances within this policy. This policy uses the assign-queue attribute to put each department's traffic on a different egress queue.

  • Page 146: Diffserv For Voip Configuration Example

    Set the CoS queue configuration for the (presumed) egress interface 1/g5 such that each of queues 1, 2, 3 and 4 get a minimum guaranteed bandwidth of 25%. All queues for this interface use weighted round robin scheduling by default. The DiffServ inbound policy designates that these queues are to be used for the departmental traffic through the assign-queue attribute.
  • Page 147 Figure 7-4. DiffServ VoIP Example Network Diagram Quality of Service...
  • Page 148 Example #2: Configuring DiffServ VoIP Support Enter Global Config mode. Set queue 6 on all ports to use strict priority mode. This queue shall be used for all VoIP packets. Activate DiffServ for the switch. console#config cos-queue strict 6 diffserv Create a DiffServ classifier named class_voip and define a single match criterion to detect UDP packets.

  • Page 149: Multicast

    Multicast This section provides configuration scenarios for the following features: • "IGMP Configuration" on page 150 • "IGMP Proxy" on page 151 • "DVMRP" on page 152 • "PIM" on page 154 • "Multicast Routing and IGMP Snooping" on page 157 Overview IP Multicasting enables a network host (or multiple hosts) to send an IP datagram to multiple destinations simultaneously.

  • Page 150: When To Enable Ip Multicast On The Powerconnect 6200 Series Switch

    When to Enable IP Multicast on the PowerConnect 6200 Series Switch Use the IP multicast feature on the PowerConnect 6200 Series switch to route multicast traffic between VLANs on the switch. If all hosts connected to the switch are on the same subnet, there is no need to configure the IP multicast feature.

  • Page 151: Igmp Proxy

    CLI Examples The CLI component of the Dell switch allows the end users to configure the network device and to view device settings and statistics using a serial interface or telnet session.

  • Page 152: Dvmrp

    Example #2: View IGMP Proxy Configuration Data You can use various commands from Privileged EXEC or User EXEC modes to show IGMP proxy configuration data. • Use the following command to display a summary of the host interface status parameters. It displays the parameters only when IGMP Proxy is enabled.

  • Page 153: Cli Example

    CLI Example The following example configures two DVMRP interfaces. First, this example configures an OSPF router and globally enables IP routing and IP multicast. IGMP is globally enabled so that this router can manage group membership information for its directly-connected hosts (IGMP may not be required when there are no directly connected hosts).

  • Page 154: Pim

    Protocol Independent Multicast (PIM) is a standard multicast routing protocol that provides scalable inter-domain multicast routing across the Internet, independent of the mechanisms provided by any particular unicast routing protocol. PIM has two types: • PIM-Dense Mode (PIM-DM) • PIM-Sparse Mode (PIM-SM) PIM-SM PIM-SM is used to efficiently route multicast traffic to multicast groups that may span wide area networks where bandwidth is a constraint.

  • Page 155: Pim-Dm

    Example: PIM-SM The following example configures PIM-SM for IPv4 on a router. First, configure an OSPF router and globally enable IP routing, multicast, IGMP , and PIM-SM. Next, configure a PIM-SM rendezvous point with an IP address and group range. The IP address will serve as an RP for the range of potential multicast groups specified in the group range.
  • Page 156 To minimize the repeated flooding of datagrams and subsequent pruning associated with a particular source-group (S,G) pair, PIM-DM uses a State Refresh message. This message is sent by the router(s) directly connected to the source and is propagated throughout the network. When received by a router on its RPF interface, the State Refresh message causes an existing prune state to be refreshed.

  • Page 157: Multicast Routing And Igmp Snooping

    Multicast Routing and IGMP Snooping In this example, ports 1/g5 and 1/g10 are members of VLAN 100, and port 1/g15 is a member of VLAN 200. Both VLANs are configured as VLAN routing interfaces and are in different subnets. IGMP snooping is configured on VLAN 100 so that a member port will receive multicast data only if it sends an IMGP join message for that multicast group.
  • Page 158 8 Globally enable IGMP snooping, IP multicast, IGMP, and PIM-DM on the switch. console(config)#ip igmp snooping console(config)#ip multicast console(config)#ip igmp console(config)#ip pimdm NOTE: Only one multicast routing protocol (PIM-SM, PIM-DM, or DVMRP) can be enabled globally on the switch at a time. 9 Configure ports 1/g5 and 1/g10 as members of VLAN 100.
  • Page 159 console#show ip igmp IGMP Admin Mode... Enabled IGMP Router-Alert check... Disabled IGMP INTERFACE STATUS Interface Interface-Mode --------- -------------- vlan 100 Enabled vlan 200 Enabled The host connected to interface 1/g5 sends an IGMP join message for multicast group 225.1.1.1 in VLAN 100.
  • Page 160 Multicast...

  • Page 161: Utility

    Utility This section describes the following features: • "Auto Config" on page 162 • "Nonstop Forwarding on a Switch Stack" on page 168 Utility...

  • Page 162: Auto Config

    Auto Config Overview Auto Config is a software feature that automatically configures a switch when the device is initialized and no configuration file is found on the switch. Auto Config is accomplished in three phases: 1 Assignment (configuration) of an IP address for the device 2 Assignment of a TFTP server 3 Obtaining a configuration file for the device from the TFTP server Functional Description...
  • Page 163 – The hostname of the TFTP server (option 66 or sname). Either the TFTP address or name is specified (not both) in most network configurations. If a TFTP hostname is given, a DNS server is required to translate the name to an IP address. –...
  • Page 164 Once a hostname has been determined, the switch then issues a TFTP request for a file named ".cfg" file, where is the first 32 characters of the switch's hostname. If the switch is unable to map its IP address to a hostname, Auto Config sends TFTP requests for the default configuration file "host.cfg."...
  • Page 165 Host-Specific Config File Not Found If the Auto Config process fails to download a configuration file, a message is logged. If a final configuration file is not downloaded, as described in Table 9-1, the Auto Config procedure continues to issue TFTP broadcast requests. The frequency of the broadcasts is once per 10 minute period. Terminating the Auto Config Process A user can terminate the Auto Config process at any time prior to the downloading of the config file.
  • Page 166 Dependency Upon Other Network Services The Auto Config process depends upon the following network services: • A DHCP or BOOTP server must be configured on the network with appropriate services. • A configuration file for the switch must be available from a TFTP server on the network. •...

  • Page 167: Cli Examples

    TFTP Client The TFTP client downloads configuration files and sends TFTP requests to the broadcast IP address (255.255.255.255). DNS Client The DNS client resolves an IP address to a hostname and resolves a hostname to an IP address (reverse IP address to hostname mapping).

  • Page 168: Nonstop Forwarding On A Switch Stack

    Nonstop Forwarding on a Switch Stack Networking devices, such as the PowerConnect 6200 Series switches, are often described in terms of three semi-independent functions called the forwarding plane, the control plane, and the management plane. The forwarding plane forwards data packets and is implemented in hardware. The control plane is the set of protocols that determine how the forwarding plane should forward packets, deciding which data packets are allowed to be forwarded and where they should go.
  • Page 169 NOTE: The switch cannot guarantee that a backup unit has exactly the same data that the management unit has when it fails. For example, the management unit might fail before the checkpoint service gets data to the backup if an event occurs shortly before a failover. Table 9-3 lists the applications on the switch that checkpoint data and describes the type of data that is checkpointed.

  • Page 170: Switch Stack Mac Addressing And Stack Design Considerations

    Switch Stack MAC Addressing and Stack Design Considerations The switch stack uses the MAC addresses control due to a management unit failure or warm restart, the backup unit continues to use the original management unit’s MAC addresses. This reduces the amount of disruption to the network because ARP and other L2 entries in neighbor tables remain valid after the failover to the backup unit.

  • Page 171: Configuration Examples

    NSF feature acts in various environments and with various switch applications. Data Center Figure 9-1 illustrates a data center scenario, where the stack of two PowerConnect 6200 Series switches acts as an access switch. The access switch is connected to two aggregation switches, AS1 and AS2. The stack has a link from two different units to each aggregation switch, with each pair of links grouped together in a LAG.
  • Page 172 VoIP Figure 9-2 shows how nonstop forwarding maintains existing voice calls during a management unit failure. Assume the top unit is the management unit. When the management unit fails, the call from phone A is immediately disconnected. The call from phone B continues. On the uplink, the forwarding plane removes the failed LAG member and continues using the remaining LAG member.
  • Page 173 Figure 9-3. NSF and DHCP Snooping Hosts Hosts DHCP Server If the management unit fails, all hosts connected to that unit lose network access until that unit reboots. The hardware on surviving units continues to enforce source filters IPSG installed prior to the failover. Valid hosts continue to communicate normally.
  • Page 174 Storage Access Network Scenario Figure 9-4 illustrates a stack of three PowerConnect 6200 Series switches connecting two servers (iSCSI initiators) to a disk array (iSCSI targets). There are two iSCSI connections as follows: Session A: 10.1.1.10 to 10.1.1.3 Session B: 10.1.1.11 to 10.1.1.1...
  • Page 175 Routed Access Scenario Figure 9-5 shows a stack of three units serving as an access router for a set of hosts. Two LAGs connect the stack to two aggregation routers. Each LAG is a member of a VLAN routing interface. The stack has OSPF and PIM adjacencies with each of the aggregation routers.
  • Page 176 Utility...

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