Huawei AC6605 Manual

Access controller dual-link backup white paper
AC6605 Access Controller
V200R001C00
Dual-Link Backup White Paper
Issue
01
Date
2012-05-30
HUAWEI TECHNOLOGIES CO., LTD.
Table of Contents
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Summary of Contents for Huawei AC6605

  • Page 1 AC6605 Access Controller V200R001C00 Dual-Link Backup White Paper Issue Date 2012-05-30 HUAWEI TECHNOLOGIES CO., LTD.
  • Page 2 Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS"...
  • Page 3: About This Document

    About This Document About This Document Purpose This document describes the dual-link backup technology of the AC6605. The dual-link backup technology provides high reliability between important network nodes to ensure service availability. This document covers the mechanism and networking modes of dual-link backup supported by the AC6605, and provides configuration examples for typical dual-link backup applications.
  • Page 4 Changes between document issues are cumulative. The latest document issue contains all the changes made in earlier issues. Issue 01 (2012-05-30) This is the first formal issue. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 5: Table Of Contents

    1.3.7 Dual-Link Backup in Layer 3 Networking and Configuration Notes ..........18 1.4 Applications .............................29 1.4.1 Direct Forwarding in Layer 3 Chain Networking ................29 1.4.2 Tunnel Forwarding in Layer 2 Branched Networking................33 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 6: Dual-Link Backup

    Configuring dual-link backup can ensure stable service operating on a WLAN network. Benefits The dual-link backup technology provides high reliability between important network nodes to ensure service availability. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 7: Availability

    AC1 fail, they switch service traffic to AC2. As they have established CAPWAP tunnels with AC2, service switching time is reduced. However, users need to go online again after the Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 8: Ap Login Process

    Option 43 to IP addresses of the active and standby ACs on the DHCP server and do not need to consider the IP address lease. The following describes the AP login process when an AC functions as a DHCP server. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 9 1 Dual-Link Backup Obtaining IP Addresses on a Layer 2 Network An AP broadcasts a DHCP Discovery packet with Option 60 as Huawei AP. The two ACs receive the DHCP Discovery packet and both reply with a DHCP Offer packet.
  • Page 10 After the tunnel is set up, the AP compares the priorities and IP addresses of the two ACs and determines the active and standby ACs. The AP performs a revertive switchover if the second AC becomes the active AC. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 11: Sta Login Process

    AC changes to active state and sets the AP status to normal. The AP then send service data to the new active AC. The AP periodically sends Discovery Request packets to check whether the failed link recovers. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 12: Loop Prevention In Vlans

    The management VLAN of the APs only needs to be configured on the ACs and downstream switches, as shown in Figure 1-3. Therefore, no loop will be formed in the VLAN. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 13 If the AP management VLAN is the same as a VLAN of switches or STAs, a loop occurs in this VLAN. To prevent loops in this VLAN, enable MSTP (recommended) or configure port Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 14 Figure 1-5). Figure 1-5 Loop formed when AP management VLAN is the same as a VLAN of switches or STAs Aggregation switch Aggregation switch Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 15: Dual-Link Backup In Layer 2 Networking And Configuration Notes

    AC fails, services cannot be switched to the standby AC because BSSIDs of the two ACs are different. Run the following commands: [AC6605_AC1] wlan ac-global ac id 999 carrier id ctc [AC6605_AC2] wlan ac-global ac id 999 carrier id ctc Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 16 It is recommended that MSTP be enabled on the aggregation switch to prevent loops. For details on how to enable MSTP on the aggregation switch, see the configuration guide of the switch. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 17 : 19.19.19.2 Priority Protect restore : enable ------------------------------------------------------------ [AC6605_AC2] display wlan ac protect ------------------------------------------------------------ Protect state : enable Protect AC : 19.19.19.1 Priority Protect restore : enable ------------------------------------------------------------ Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 18 AC2. It is recommended that the same AP ID be configured for an AP on AC1 and AC2. Run the following commands: [AC6605_AC1] wlan [AC6605_AC1-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182 [AC6605_AC2] wlan Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 19 In Layer 2 networking, the ACs can use only IP addresses of VLANIF interfaces as their  source IP addresses to communicate with APs. In Layer 3 networking, the ACs can also use loopback addresses as source IP addresses. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 20 : 19.19.19.2 Priority Protect restore : enable ------------------------------------------------------------ [AC6605_AC2] display wlan ac protect ------------------------------------------------------------ Protect state : enable Protect AC : 19.19.19.1 Priority Protect restore : enable ------------------------------------------------------------ Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 21 In addition, the BRAS interface connected to the aggregation switch must work at Layer 2 to ensure Layer 2 communication between the ACs and APs. For the BRAS configuration, see the configuration guide of the BRAS. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 22 In addition, the BRAS interface connected to the aggregation switch must work at Layer 2 to ensure Layer 2 communication between the ACs and APs. For the BRAS configuration, see the configuration guide of the BRAS. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 23: Dual-Link Backup In Layer 3 Networking And Configuration Notes

    AC fails, services cannot be switched to the standby AC because BSSIDs of the two ACs are different. Run the following commands: [AC6605_AC1] wlan ac-global ac id 999 carrier id ctc [AC6605_AC2] wlan ac-global ac id 999 carrier id ctc Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 24 In Layer 3 networking, AC1 and AC2 can use loopback IP addresses as source IP  addresses to communicate with APs. Source IP addresses of the ACs can be located on Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 25 : 30.30.30.2 Priority Protect restore : enable ------------------------------------------------------------ [AC6605_AC2] display wlan ac protect ------------------------------------------------------------ Protect state : enable Protect AC : 30.30.30.1 Priority Protect restore : enable ------------------------------------------------------------ Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 26 AC2. It is recommended that the same AP ID be configured for an AP on AC1 and AC2. Run the following commands: [AC6605_AC1] wlan [AC6605_AC1-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 27 In Layer 3 networking, AC1 and AC2 can use loopback IP addresses as source IP  addresses to communicate with APs. Source IP addresses of the ACs can be located on Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 28 : 30.30.30.2 Priority Protect restore : enable ------------------------------------------------------------ [AC6605_AC2] display wlan ac protect ------------------------------------------------------------ Protect state : enable Protect AC : 30.30.30.1 Priority Protect restore : enable ------------------------------------------------------------ Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 29 Run the following commands: [AC6605_AC1] wlan [AC6605_AC1-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182 [AC6605_AC2] wlan [AC6605_AC2-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 30 IP addresses to APs. Enable the dual-link backup function on AC1 and AC2 and set a priority for each AC.  Run the following commands: [AC6605_AC1] wlan Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 31 : 30.30.30.2 Priority Protect restore : enable ------------------------------------------------------------ [AC6605_AC2] display wlan ac protect ------------------------------------------------------------ Protect state : enable Protect AC : 30.30.30.1 Priority Protect restore : enable ------------------------------------------------------------ Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 32 [AC6605_AC2-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182 Before enabling dual-link backup, complete the tunnel configuration and commit the  configuration on AC1 and AC2. If you enable dual-link backup before committing the Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 33 APs. Source IP addresses of the ACs can be located on different network segments. The DHCP function must be enabled on VLANIF interfaces instead of the loopback interfaces to allocate IP addresses to APs. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 34: Applications

    AC1 contains IP addresses 40.40.40.3 to 40.40.40.100, IP address pool on AC2 contains IP addresses on AC2 is 40.40.40.101 to 40.40.40.254. Set the gateway address Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 35 VLAN 3010 GE0/0/1 GE0/0/1 GE0/0/1 GE0/0/2 Switch IP: 30.30.30.5/24 IP: 40.40.40.2/24 GE0/0/3 VLAN 40 # Wireless-side configuration file of AC1 sysname AC1 vlan batch 40 3010 3931 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 36 # Wireless-side configuration file of AC2 sysname AC2 vlan batch 40 3010 3931 wlan ac-global carrier id cmcc ac id 999 dhcp enable ip pool ap Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 37 Vlanif40 ip address 40.40.40.2 255.255.255.0 dhcp select relay dhcp relay server-ip 30.30.30.1 dhcp relay server-ip 30.30.30.2 dhcp relay information enable interface Vlanif3010 ip address 30.30.30.5 255.255.255.0 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 38: Tunnel Forwarding In Layer 2 Branched Networking

    AC2 contains IP addresses 19.19.19.101 to 19.19.19.254. Set the gateway address of the IP address pool on AC1 to 19.19.19.1, and set the gateway address of the IP address pool on AC2 to 19.19.19.2. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 39 Configure the Option 43 field with the IP addresses of the active and standby ACs, and  configure the Option 60 field to identify Huawei APs. Option 43 and Option 60 are optional in Layer 2 networking. Configuration on the aggregation switch is as follows: Configure VLAN 3010 and VLAN 3931, and assign IP address 30.30.30.5 to VLANIF...
  • Page 40 3010 3931 return # Wireless-side configuration file of AC2 sysname AC2 vlan batch 3010 3931 wlan ac-global carrier id cmcc ac id 999 dhcp enable ip pool ap Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 41 Vlanif3931 ip address 30.30.30.5 255.255.255.0 interface GigabitEthernet0/0/1 description connect to active AC port link-type trunk port trunk pvid vlan 3010 port trunk allow-pass vlan 3010 interface GigabitEthernet0/0/2 Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.
  • Page 42 The preceding configuration files show the basic configurations used for dual-link backup in Layer 2 branched networking. You can configure services on the ACs and switches after completing the preceding configurations. Issue 01 (2012-05-30) Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd.

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