On 08/05/2014 11:25, Henning Brauer wrote:
you shouldn't see issues but log spam.
maybe you misunderstand the problem. If you have vrrp and carp on the same vlan, using the same vrrp group ID as VHID, then each virtual IP will arp for the same mac address on that vlan. This messes up the switch's forwarding table for that particular vlan because it sees multiple entries from different ports for the same mac address. Switches will not do unicast replication in this situation, but instead will forward all traffic for a particular destination mac address to the port which announced the mac address most recently. In other words, this is much more serious than log spam: it is guaranteed to cause network downtime, because you cannot have two hosts on the same L2 domain using the same mac address, but doing different things. Nick