[c-nsp] Is the following HSRP setup possible?

[Eric Helm]

d99 wrote:
> I have a site with a router that I would like to make
> redundant.  My connection to the ISP is ethernet all
> the way, and I currently have only one public IP
> address between my last hop and the ISP.  Is it
> possible to use HSRP to make this router redundant on
> both eth0 and eth1 interfaces?  I was successful in
> setting up HSRP for the eth1 interfaces, but I have
> plenty of public IP's to use on the eth1 side. I
> attempted to create a standby ip for the eth0
> interfaces using my eth0 IP address, but the router
> complained that the IP was currently in use by eth0. 
> I also tried creating bogus IP addr's on eth0 with the
> legit IP for the standby IP, but that failed to route
> traffic to the ISP. 
> 
> Hopeful setup:
> 
> ISP Router (1.1.1.1/30) -> Switch1
> MyRouter-A eth0 (1.1.1.2/30 HSRP)-> Switch1
> MyRouter-B eth0 (1.1.1.2/30 HSRP)-> Switch1
> 
> MyRouter-A eth1 (2.2.2.1/24 HSRP) -> Switch2
> MyRouter-B eth1 (2.2.2.1/24 HSRP) -> Switch2
> 
> 
> My goal is that if either link (eth0 or eth1) goes
> down on the active router, the standby router will
> then take over. 
> 
> Is the above scenario possible?

Yes, use the standby X track interface command on each HSRP group.
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ics/cs009.htm#wp3475
http://www.cisco.com/warp/public/619/6.html

/Eric