2010-10-14 16:10:17 GMT
Sent: Thursday, October 14, 2010 11:13 AM
To: Stephen Nadas
Stephen, I want to ask you a question about this RFC and the VRRP protocol. Regarding section 6.4.3, bullet points (735) to (765).
If 2 vrrp routers became isolated for whatever reason, one router would remain as master, the other would transition from backup to master and send a gratuitous arp (ipv4 only) to notify remote arp caches. My question is about when the fault is corrected. One router transitions from master to backup; the other router still remains as master. The backup router follows (735) to (765), but the master seemingly does nothing at all. In particular the now-for-real master does not send a gratuitous arp. This leaves remote arp caches with the wrong ip/mac value.
I’m sure this has been considered. What is typically done to prevent this scenario or to recover from it?
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