Failover Not Working

[vishal.rane]

Hello

I got setup where Site A is connected to Site B , Site B is connected to Site C

A------------B-----------------C

Site A connected to Site B < GRE over IPSEC with OSPF >

Site B connected to Site C < Point to Point >

To have redundancy betwen Site A and Site C we configured < GRE over IPSEC >

Traffic dont pass from Site A to Site C using the GRE Tunnel when we manullay shutdown the interface on Site C 

( interface which is P-2-P with Site B )

show ip route output indicates traffic still passing A-----B------C

unless

i have a static route on Site A

ip route 172.16.50.0 255.255.255.0 Tunnel 2      ( Tunnel 2 is GRE tunnel between Site A and Site C )

We prefer to have Primay path for Site C from Site A  ->  A ------------ B ------------------C

if link between B------C is down then

Failover path would be  A-------------------C

Appreciate some input

thanks

Vishal

[CSCO11256353]

On router A you can give a static route to use the link b/w B and C and track the connectivity to C through a SLA

the other route from A to C should have a higher AD, so once the SLA fails the direct route will be installed immediatly.

[Neeraj Arora]

totally agree with the above post.

Site A router needs to know that link between SiteB & C is down, so either make modifications in SiteB so that OSPF stop sending the SiteC subnet(172.16.50.0/24) route over to SiteA so that failover to a secondary route can happen or use IP SLA feature with static route for failover

Hope it helps

Neeraj