Cisco Catalyst 3560CX Series Manual
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Cisco Catalyst 3560CX Series Manual

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Table of Contents

Managing Switch Stacks
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Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.

Prerequisites for Switch Stacks

Restrictions for Switch Stacks

There are no restrictions with Horizontal Stacking on Catalyst 3560cx.
Managing Switch Stacks
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Summary of Contents for Cisco Catalyst 3560CX Series

  • Page 1: Table Of Contents

    Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

  • Page 2: Information About Switch Stacks

    Information About Switch Stacks Horizontal Stacking The Catalyst 3560CX series switches supporting 10G SFP+ uplink ports and MGig ports can be part of horizontal stacking. We can use SFP+ with the optical cables and copper cables on the MGig ports to connect boxes placed at different location to form a stack, where the compact boxes are placed in different floors or buildings.
  • Page 3 Managing Switch Stacks Changes to Switch Stack Membership Figure 1: Creating a Switch Stack from Two Standalone Switches Figure 2: Adding a Standalone Switch to a Switch Stack Changes to Switch Stack Membership If you replace a stack member with an identical model, the new switch functions with exactly the same configuration as the replaced switch, assuming that the new switch (referred to as the provisioned switch) is using the same member number as the replaced switch.
  • Page 4 Managing Switch Stacks Stack Member Numbers • An IP address conflict in your network. If you want the switch stacks to remain separate, change the IP address or addresses of the newly created switch stacks. • A MAC address conflict between two members in the stack. You can use the stack-mac update force command to resolve the conflict.
  • Page 5 Managing Switch Stacks Stack Member Priority Values • If you move a stack member to a different stack, the stack member retains its number only if the number is not being used by another member in the stack. If it is being used, the selects the lowest available number in the stack.
  • Page 6 Managing Switch Stacks Switch Stack Bridge ID and MAC Address Note We recommend assigning the highest priority value to the device that you prefer to be the stack master. This ensures that the device is reelected as the stack master if a reelection occurs. To change the priority value for a stack member, use the switch stack-member-number priority new priority-value command.
  • Page 7 Managing Switch Stacks Offline Configuration to Provision a Stack Member Note The interface-specific settings of the stack master are saved if the stack master is replaced without saving the running configuration to the startup configuration. A new, out-of-box device joining a switch stack uses the system-level settings of that switch stack. If a device is moved to a different switch stack before it is powered on, that device loses its saved configuration file and uses the system-level configuration of the new switch stack.
  • Page 8 Managing Switch Stacks Effects of Adding a Provisioned Switch to a Switch Stack file ensures that the switch stack can reload and can use the saved information whether or not the provisioned switch is part of the switch stack. Effects of Adding a Provisioned Switch to a Switch Stack When you add a provisioned Device to the switch stack, the stack applies either the provisioned configuration or the default configuration.
  • Page 9 The switches with the same Cisco IOS software version have the same stack protocol version. Such switches are fully compatible, and all features function properly across the switch stack. A device with the same Cisco IOS software version as the stack master can immediately join the switch stack.
  • Page 10 Managing Switch Stacks Switch Stack Management Connectivity When a new switch attempts to join a switch stack, each stack member performs compatibility checks with itself and the new switch. Each stack member sends the results of the compatibility checks to the stack master, which uses the results to determine whether the switch can join the switch stack.

  • Page 11: How To Configure A Switch Stack

    Managing Switch Stacks Connectivity to the Switch Stack Through Console Ports Connectivity to the Switch Stack Through Console Ports You can connect to the stack master by connecting a terminal or a PC to the stack master through the console port of one or more stack members.
  • Page 12 Managing Switch Stacks Enabling the Persistent MAC Address Feature Command or Action Purpose Switch# show switch hstack-ports Step 6 copy running-config startup-config (Optional) Saves your entries in the configuration file. Example: Switch# copy running-config startup-config Step 7 reload Reloads the configuration. Example: Switch# reload What to do next...
  • Page 13 Managing Switch Stacks Enabling the Persistent MAC Address Feature Procedure Command or Action Purpose Step 1 enable Enables privileged EXEC mode. Example: • Enter your password if prompted. Switch> enable Step 2 configure terminal Enters global configuration mode. Example: Switch# configure terminal Step 3 stack-mac persistent timer [0 | time-value] Enables a time delay after a stack-master change...
  • Page 14 Managing Switch Stacks Assigning a Stack Member Number Command or Action Purpose If you enter the no stack-mac Note persistent timer command after a new stack master takes over, before the time expires, the switch stack moves to the current stack master MAC address.
  • Page 15 Managing Switch Stacks Setting the Stack Member Priority Value Command or Action Purpose Step 3 switch current-stack-member-number Specifies the current stack member number and renumber new-stack-member-number the new stack member number for the stack member. The range is 1 to 8. Example: You can display the current stack member Switch(config)# switch 3 renumber 4...
  • Page 16 Managing Switch Stacks Provisioning a New Member for a Switch Stack Command or Action Purpose Switch# switch 3 priority 2 You can display the current priority value by using the show switch user EXEC command. The new priority value takes effect immediately but does not affect the current stack master.
  • Page 17 Managing Switch Stacks Removing Provisioned Switch Information Command or Action Purpose Step 4 Returns to privileged EXEC mode. Example: Switch(config)# end Step 5 copy running-config startup-config (Optional) Saves your entries in the configuration file. Example: Switch# copy running-config startup-config Removing Provisioned Switch Information Before you begin, you must remove the provisioned switch from the stack.

  • Page 18: Troubleshooting The Switch Stack

    Managing Switch Stacks Troubleshooting the Switch Stack • Stack member 1 is the stack master • Stack member 3 is a provisioned switch and want to remove the provisioned information and to avoid receiving an error message, you can remove power from stack member 3, disconnect the cables between the stack member 3 and switches to which it is connected, reconnect the cables between the remaining stack members, and enter the no switch stack-member-number provision global configuration command.

  • Page 19: Monitoring The Device Stack

    Managing Switch Stacks Reenabling a Stack Port While Another Member Starts Enabling/disabling a stack port may cause undesired stack changes. Continue?[confirm] When you disable a stack port and the stack is in the partial-ring state, you cannot disable the port. This message appears: Disabling stack port not allowed with current stack configuration.

  • Page 20: Configuration Examples For Switch Stacks

    Managing Switch Stacks Configuration Examples for Switch Stacks Configuration Examples for Switch Stacks Switch Stack Configuration Scenarios Most of these switch stack configuration scenarios assume that at least two device are connected through their ports. Table 4: Configuration Scenarios Scenario Result Stack master election Connect two powered-on switch stacks...
  • Page 21 Managing Switch Stacks Enabling the Persistent MAC Address Feature: Example Scenario Result Stack member number Assuming that one stack member has a The stack member with the higher conflict higher priority value than the other stack priority value retains its stack member: member number.
  • Page 22 Managing Switch Stacks Provisioning a New Member for a Switch Stack: Example Mac persistency wait time: 7 mins Current Switch# Role Mac Address Priority Version State ---------------------------------------------------------- Master 0016.4727.a900 Ready Provisioning a New Member for a Switch Stack: Example This example shows how to provision a switch with a stack member number of 2 for the switch stack. The show running-config command output shows the interfaces associated with the provisioned switch: Configuring a Network Port into a Stack Port: Examples The following example shows how to convert a network port to stack port.

  • Page 23: Additional References For Switch Stacks

    Related Documents Related Topic Document Title Cabling and powering on a switch stack. Error Message Decoder Description Link To help you research and resolve system https://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi error messages in this release, use the Error Message Decoder tool. Managing Switch Stacks...
  • Page 24 Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password. Managing Switch Stacks...

This manual is also suitable for:

Catalyst ws-c3560cx-12pd-sCatalyst ws-c3560cx-8xpd-sCatalyst 3560-cxCatalyst 2960-cxWs-c3560cx-12pd-sWs-c3560cx-8xpd-s

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