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Re: [lvs-users] keepalived - VRRP setup with no master

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] keepalived - VRRP setup with no master
From: Sander Klein <roedie@xxxxxxxxx>
Date: Thu, 08 Jul 2010 23:22:19 +0200
Replying to my own mail...

> I think you can give both directors the same priority. A director that
is
> in backup state and receives a vrrp packet with the same priority as
it's
> own should stay in backup state. But I can imagine it is possible that
both
> directors get in a state that they both start flapping between master
and
> backup state. I didn't look at any code, I only quickly reviewed the
RFC.
> So it might as well just work.

Keepalived 1.2.0 uses a modified VRRPv3 protocol. I just read in that RFC
that if both priorities are the same, the one with the greater primary ip
address becomes the master. Not sure how keepalived 1.2.0 handles this...
1.1.X uses VRRPv2. That has the previously described behavior.

Greets,

Sander

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