[c-nsp] l3 gateway redundancy without eating three ip addresses inthe subnet

Arie Vayner (avayner) avayner at cisco.com
Wed Feb 20 10:03:23 EST 2008


Joe,

One option is to use VRRP. In VRRP the virtual IP is the actual IP used
on the physical interface of the primary router, so you will still have
to assign an IP address for each router (but this would be the case in
any solution anyway), but no need for a 3rd IP for the virtual. 

For VRRP, check:
http://www.cisco.com/en/US/docs/ios/12_4t/ip_appl/configuration/guide/ht
apvrrp.html

Arie

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Joe Maimon
Sent: Wednesday, February 20, 2008 16:40 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] l3 gateway redundancy without eating three ip addresses
inthe subnet

Is there a supported cisco method to provide gateway redundancy (hsrp,
vrrp) without having to use three ip addresses from the same subnet?
slb?


Thanks,

Joe

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