Nokia IPSO 4.0 manual Additional Vrrp Parameters Used in Full Method

Table 10 Additional VRRP Parameters Used in Full Method

Parameter	Description
Preempt mode	Preempt mode is enabled by default.
	Check disabled to specify that this router will not fail over to a router with higher
	priority. Use this setting if you want to reduce the number of transitions. For example,
	if you disable preempt mode on a backup and the master fails over to it, then when
	the master becomes active again, the virtual router will not fail back to it. Rather the
	new master will remain the master even though it has a lower priority.
	Monitored-circuit VRRP operates by triggering the failover of all mcVRRP interfaces
	on a platform when one interface goes down. It triggers failover by subtracting the
	priority delta from the priority for each mcVRRP interface, causing the interface to fail
	over to a node with a higher priority. If you disable preempt mode, interfaces will no
	longer failover in this way; they will only failover if their effective priority is 0.
	Therefore, if you disable preempt mode, you must also apply the following settings to
	each interface in the VRRP group. These conditions do not apply to VRRPv2.
	• Enable auto-deactivation. This allows the effective priority to be set to 0. If you do
	not enable auto-deactivation, the lowest effective priority allowed is 1 even if the
	priority minus the delta mathematically equals 0.
	• Set the priority delta to the same value as the priority for each interface on the
	virtual router. This means that the priority minus the priority delta equals 0.
Monitor interface	Select an interface that this interface will monitor and specify a priority delta. As you
	select each interface and click Apply, it appears in the list above the Monitor interface
	drop-down box.
Auto-deactivation	Enable auto-deactivation if you want to allow the minimum value for effective priority
	to be 0. A VRRP router with an effective priority of 0 will not become the master even
	if there are no other VRRP routers with higher priority for this virtual router. If auto-
	deactivation is disabled (the default), the lowest allowable value for effective priority
	is 1.

Note

You cannot change the backup address from one interface to another interface while a platform is in the master state. To modify a virtual IP address, first cause a failover to the backup by reducing the priority or by pulling an interface, then delete the VRID on the interface and re-create using the new IP address, then configure it as it was configured before.

To add a virtual router

1.Click VRRP under Configuration > High Availability in the tree view.

2.Click VRRP Legacy Configuration.

3.In the row for the interface you want to configure, select the Monitored Circuit radio button.

4.Click Apply.

The Create Virtual Router text box appears.

Nokia Network Voyager for IPSO 4.0 Reference Guide 195