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Accepted
Ryan
Asked: 2013-01-29 06:11:20 +0800 CST

Keepalived's virtual_router_id - should it be unique per node?

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I have two nodes running keepalived, and two VIP, e.g.

Node 1      Node 2
VIP1        VIP2

So in each node, I have two definition of vrrp_instance, so I assume the two vrrp_instance in my keepalived.conf suppose to be unique, but they can be the same values on another node, right?

high-availability

1 Answers

  1. Best Answer

    Different VRRP instances should have different virtual_router_id values. Same VRRP instances should have the same value.

    You can read the following from man keepalived.conf:

    # arbitary unique number 0..255
# used to differentiate multiple instances of vrrpd
# running on the same NIC (and hence same socket).
virtual_router_id 51

    To summarize, you need to have the same value on the members of same cluster. If you have another cluster, its members should have another value. The virtual_router_id should be unique per VRRP cluster.

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