Users Guide

Table Of Contents
630| Increasing Network Uptime Through Redundancy and VRRP Dell Networking W-Series ArubaOS 6.5.x| User Guide
To maintain a highly redundant network, the administrator can use a controller to act as a hot standby for the
master controller. The underlying protocol used is the same as in local redundancy, that is, VRRP.
Collect the following data before configuring master controller redundancy:
l VLAN ID for the two controllers on the same Layer-2 network.
l Virtual IP address that has been reserved to be used for the VRRP instance.
You can use either the WebUI or CLI to configure VRRP on the master controllers (see Table 132). For this
topology, the following values are recommended:
l For priority: Set the master to 110; set the backup to 100 (the default value)
l Enable preemption
l Configure master up time or master state tracking with an add value of 20.
The following is a configuration example for the 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 following configuration is 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 following commands to associate the VRRP instance with master controller redundancy:
Command Explanation
master-redundancy
Enters the master-redundancy context.
master-vrrp <id>
Associates a VRRP instance with master redundancy. Enter
the virtual router ID of the VRRP instance.
peer-ip-address <ipaddr> ipsec <key>
Loopback IP address of the peer controller for master
redundancy.
The pre-shared key secures communication between the
master controllers. Specify a key of up to 64 characters.
masterip <ipaddr> ipsec <key>
Configures the master IP address and pre-shared key on a
local controller for communication with the master
controller.
Configure this to be the virtual IP address of the VRRP
instance used for master redundancy.
Table 133: VRRP Commands