[c-nsp] Backup Interface & IPv6 - why is Cisco sleeping?

[Ian Henderson]

On 15/12/2010, at 1:54 AM, Garry wrote:

> I'm really starting to
> wonder whether we're the only ones on this earth still using a dual
> switch config for our routers for redundancy purposes ...

So you're using backup interface for two Ethernet interfaces, both facing the same switched network? Cool - haven't seen backup interfaces since they were used to dial ISDN terminal adaptors. Is anyone else out there doing this? Out of curiosity, what kind of failover time do you get for IPv4? Does it swap the MAC address too? 

While I'm on the topic, what are folk's thoughts on setting up a BVI on a router connecting to two separate switches in the same switched network? Its always seemed a bit hacky to me. What are the performance implications on a CPU based platform (7200, etc)?

Of course, a routing protocol with link state would be optimal, but you've got to plug those server kids in somewhere. :)

Rgds,



- I.