Zyxel OLT2412 [222/326] Advertisement interval

Chapter 30 VRRP

OLT2412 User’s Guide

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30.1.1 VRRP Parameters

This section describes the VRRP parameters.

30.1.1.1 Advertisement Interval

The master router sends out Hello messages to let the other backup routers know that it

is still up and running. The time interval between sending the Hello messages is the

advertisement interval. By default, a Hello message is sent out every second.

If the backup routers do not receive a Hello message from the master router after this

interval expires, it is assumed that the master router is down. Then the backup router

with the highest priority becomes the master router.

Note: All routers participating in the virtual router must use the same advertisement interval.

30.1.1.2 Priority

Configure the priority level (1 to 254) to set which backup router to take over in case the

master router goes down. The backup router with the highest priority will take over. The

priority of the VRRP router that owns the IP address(es) associated with the virtual router

is 255.

30.1.1.3 Preempt Mode

If the master router is unavailable, a backup router assumes the role of the master

router. However, when another backup router with a higher priority joins the network, it

will preempt the lower priority backup router that is the master. Disable preempt mode to

prevent this from happening.

By default, a layer 3 device with the same IP address as the virtual router will become the

master router regardless of the preempt mode.