AC6605 Access Controller
Dual-Link Backup White Paper
1
Dual-Link Backup
Issue 01 (2012-05-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
24
Layer 3 Branched Networking (Direct Forwarding)
Figure 1-12
Dual-link backup in Layer 3 branched networking (direct forwarding)
AP
AP
BRAS
Aggregation
switch
IP: 80.0.0.8
AC2
IP: 30.30.30.2/24
AC1
IP: 30.30.30.1/24
VLAN 3010
VLAN 3931
VLAN 8
IP: 80.0.0.X
IP: 80.0.0.X
IP: 80.0.0.1
Access switch
Access switch
VLAN 3010: management VLAN
VLAN 3931: service VLAN
As shown in Figure 1-12, the ACs are only connected to an aggregation switch on a Layer 3
network. Data packets from STAs are forwarded in direct mode. AC1 is the active AC, and
AC2 is the standby AC.
The configuration notes in this networking are as follows:
Configure the same AC ID and carrier ID for AC1 and AC2. Otherwise, after the active
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
The ACs must deliver the same VAP to an AP. Manually add offline APs to AC1 and
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
[AC6605_AC2-wlan-view] ap id 0 ap-type WA601 mac 0025-9876-2633 sn A0928182
