I would like to understand whether/how the 'no ip gratuitous-arps' command impacts the functionality of server NIC failover.
The network is based on Cisco Catalyst 6500 runnning native IOS (single IOS) with VLANs seperating the various server and user platforms.
During packet capture investigations Sun servers with IPMP and Microsoft Exchange clusters use Gratuitous ARPs to inform the network of the change to the MAC address that is bound to the virtual IP address.
If we deploy the 'no ip gratuitous-arps' command, as noted in security recommendations, will this stop the switches from updating the change of MAC address to virtual IP address when we have a NIC failover? Therefore breaking the failover process.
Looking at the Command Reference guide, it talks about local pools and PPP connections. With this in mind, I am wondering whether this command only works with PPP connections. Hence my confusion.
Hope someone can help.