This won't work, it won't let you put two IPs in the same subnet on the router. What's a better solution would be an EEM script tied to an IP SLA so when a failure is detected on g1/1 the EEM script shuts it down, removes the IP, configures g1/1, and pings out, forcing an ARP.
As you mentioned BVI is a real solution. You need two physical interfaces on a single logical segment, which sounds like a switching problem. The only other option I can think of is putting G1/1 in a VRF and then doing some sort of wacky route leaking between global and VRF. On Wed, Aug 13, 2014 at 11:44 AM, Sam Stickland <[email protected]> wrote: > Hi, > > I'm exploring redundancy possibilities for a router hand off without a > dynamic routing protocol. It's ugly and I'm not going to explain all the > details here, but I basically have this configuration on a router: > > interface Gi1/1 > backup interface Gi1/2 > ip address 192.168.1.1 255.255.255.252 > > interface Gi1/2 > ip address 192.168.1.1 255.255.255.252 > > If interface Gi1/1 goes down will the router send a gratuitous ARP when > interface Gi1/2 comes up? I seem to remember that it's default IOS > behaviour to always send a gratuitous ARP when an interface first comes up. > > I don't have test hardware to hand and I can't simulate this in GNS because > ethernet interfaces are permanently up in dynamips. > > Regards, > > Sam > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
