Dell 6.2 Command Explanation, Table14 1:

480| VRRP DellPowerConnect W- Series ArubaOS 6.2 | User Guide
(automated as wellas manual) in reaction to events that cause a change in theenvironment (such as an AP
becoming unavailable).
The master controlleris also responsible for providing the configuration for any AP to complete it s boot process. If
the master controllerbecomes unavailable, the network continues to runwi thout any interruption.However, any
changein the network topology or configuration will require the availability of the master controller.
To maintain a highly redundantnetwork, the administrator can use a controllerto act as a hot standby for the
master controller.The underlying protocol used is the same as i n local redundancy,that is, V RRP.
lCollect the following data before configuringmaster controller redundancy.
lVLANID on the two Dell controllers that are on the same layer 2 network and will be used to configure
VRRP.
lVirtual IP address that has been reservedt o be used for the VRRP instance
lYou can useei therthe WebUI or CLI t o configureVR RP on the master Dell controllers(see Table 140). For
this topology, the following are recommendedvalues:
lFor priority: Set the master to 110; set the backup to 100 (the default value)
lEnable preemption
lConfiguremaster up ti me or master state tracking with an add value of 20.
The followingi s a configuration examplefor t he “initially-preferred master”.
(host)(config) #vrrp 22
vlan 22
ip address 10.200.22.254
priority 110
preempt
authentication password
description Preferred-Master
tracking master-up-time 30 add 20
no shutdown
The followingco nfigurationis the corresponding VRRP configuration for the peer controller.
(host)(config) #vrrp 22
vlan 22
ip address 10.200.22.254
priority 100
preempt
authentication password
description Backup-Master
tracking master-up-time 30 add 20
no shutdown
Use the followingco mmandsto as sociate the VRRP instance with master controller redundancy.
Command Explanation
master-redundancy Enterthe master-redundancy context.
master-vrrp <id> Associatesa VRRP instance wi thm asterredundancy. Enter the virtual
routerID of the VRRP instance.
peer-ip-address <ipaddr> ipsec
<key>
LoopbackIP address of the peer controller for master redundancy.
Thepre-shared key secures communication between the master Dell
controllers. Specify a keyof up to 64 characters.
Table14 1: VRRP Commands