2. Configure the AP’s standby switch with a dual role in the high availability group profile:
(host) (HA group information "grp1"): controller <ipaddress> role dual
When an LMS and backup LMS are migrated to the high availability redundancy solution with the dual switch
role:
n Each switch has its own standby (backup) switch. See High Availability Deployment Models for more details
on each deployment scenario.
n Newly deployed APs can connect directly to each switch in active mode.
n APs can failover to a backup switch in standby mode when their primary switch becomes unavailable. The
backup switch then becomes the active switch for these APs.
n LMS preemption is disabled. Under LMS preemption, APs automatically reconnect to the LMS as soon as it
comes back up. Under the high availability solution, APs remain connected to an active backup switch until
it becomes unavailable. When the backup switch fails, the APs failover to the backup's standby switch,
which can be the AP's primary switch or another switch.
If the AP's primary switch is not configured as the backup's standby switch, the APs rebootstrap to their primary
switch when both the backup switch and backup's standby switch fail.
Configuring VRRP Redundancy
In an Alcatel-Lucent network, APs are controlled by a switch. The APs tunnel all data to the switch for
processing, including encryption/decryption and bridging/forwarding data. Local switch redundancy provides
APs with failover to a backup switch if a switch becomes unavailable. Local switch redundancy is provided by
running VRRP between a pair of switches. The APs are then configured to connect to the “virtual-IP” configured
for the VRRP instance.
The two switches must be connected on the same broadcast domain (or Layer-2 connected) for VRRP operation. The
two switches should be running the same version of AOS-W.
The following section of this document includes the following procedures:
n Before you Begin on page 643
n Configuring the Local Switch for Redundancy on page 644
n Configuring the LMS IP on page 646
n Configuring the Master Switch for Redundancy on page 646
n Configuring Database Synchronization on page 648
n Enabling Incremental Configuration Synchronization (CLIOnly) on page 648
n Configuring Master-Local Switch Redundancy on page 649
Before you Begin
Before you begin configuring VRRP redundancy, obtain the following network information:
n VLAN ID for the two local switches on the same Layer-2 network.
n Virtual IP address to be used for the VRRP instance.
Before you configure VRRP, ensure that the VRRP VLAN has at least one active physical port. This port is required for
the VRRP state to become master.
AOS-W 6.5.3.x | User Guide Increasing Network Uptime Through Redundancy and VRRP | 643
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