Failover for Static routing

chintan-shah · ‎11-20-2009

I'have VLAN 10 configured with 10.15.0.254/24, VLAN 11 with 10.15.1.254/24 , and use static route for ip address w.x.y.z with GW 10.15.0.11.

Now if 10.15.0.11 is down , I should have route to 10.15.1.11 as GW.

But even if interface 10.15.0.11 is down - i still see route for the same as /24 since VLAN 10 is up. How do i remove route pointing to 10.15.0.11 and install one having GW - 10.15.1.11 ?

Rgds,

CS

Reza Sharifi · ‎11-20-2009

CS,

You need to configure floating static route for your back up connection.

So give your back up connection a higher AD

example:

ip route 172.31.10.0 255.255.255.0 10.15.0.11

ip route 172.31.10.0 255.255.255.0 10.15.1.11 254

HTH

Reza

Giuseppe Larosa · ‎11-20-2009

Hello Chintan,

you should use reliable static routing so that the device can detect next-hop failure of primary static route

see

http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html

http://www.cisco.com/en/US/docs/ios/12_3/12_3x/12_3xe/feature/guide/dbackupx.html#wp1071672

you need to configure a probe to check IP reachability of IP next hop of primary route.

How to do this is IOS version dependent follow the document.

if this is a multilayer switch the L3 interface Vlan 10 is up until at least one interface is in STP forwarding state for vlan 10.

This is called autostate.

Hope to help

Giuseppe