User's Manual

581 | Increasing Network Uptime Through
Redundancy and VRRP
Dell Networking W-Series ArubaOS 6.4.x| User Guide
Parameter Description
When the timer is triggered, it forces VRRP to wait for a specified period of time,
so that all the applications are ready before coming up. This prevents the APs
from connecting to the controller before it can receive them. In the mean time,
if there is an advertisement from another VRRP, the VRRP stops the timer and
does not transition to master.
Priority Priority level of the VRRP instance for the controller. This value is used in the
election mechanism for the master.
Tracking Configures a tracking mechanism that modifies a specified value to the priority
after a controller has been the master for the VRRP instance. This mechanism is
used to avoid failing over to a backup Master for transient failures.
Tracking can be based on one of the following:
l Master Up Time: how long the controller has been the master. The value of
duration is the length of time that the administrator expects will be long
enough that the database gathered in the time is too important to be lost.
This will obviously vary from instance to instance.
l VRRP Master State Priority: the master state of another VRRP.
Tracking can also be based on the interface states of the controller:
l VLAN and Interface: prevents asymmetric routing by tracking multiple VRRP
instances. The priority of the VRRP interface determined by the sub value
can increase or decrease based on the operational and transitional states of
the specified VLAN or Fast Ethernet/Gigabit Ethernet port. When the VLAN or
interface comes up again, the value is restored to the previous priority level.
You can track a combined maximum of 16 interfaces and VLANs.
For example, you can track an interface that connects to a default gateway. In
this situation, configure the VRRP priority to decrease and trigger a VRRP master
re-election if the interface goes down. This not only prevents network traffic
from being forwarded, but reduces VRRP processing.
Admin State Administrative state of the VRRP instance. To start the VRRP instance, change
the admin state to UP in the WebUI.
VLAN VLAN on which the VRRP protocol runs.
Table 106: VRRP Parameters
In the CLI
(host)(config)#vrrp <id>
advertise <interval>
authentication <password>
description <text>
ip address <ipaddr>
no...
preempt
priority <level>
shutdown
tracking interface {fastethernet <slot>/<port>|gigabitethernet <slot>/<port>}
{sub <value>}
tracking master-up-time <duration> add <value>
tracking vlan <vlanid> {sub <value>}
tracking vrrp-master-state <vrid> add <value>
vlan <vlanid>
(host) (config)#vrrp ipv6 <id>
advertise <interval>
description <text>
ipv6 address <ipaddr>
no...
preempt