GRE Tunneling using HSRP

[stephenshaw]

Here's the initial config:

Router A

Interface tunnel1

Tunnel mode gre ip

Tunnel source 192.168.10.1

Tunnel destination 192.168.20.1

Router C

Interface tunnel 1

Tunnel mode gre ip

Tunnel source 192.168.20.1

Tunnel destination 192.168.10.1

HSRP will be configured between Router A & B using IP address of 192.168.10.1.

Here are my questions ....

1. If Router A goes down, do I need to configure a multipoint GRE tunnel to Router B even though it would take over the 192.168.10.1 IP address or can I simply use the same parameters as the "A" router?

2. If the same config is used on the "B" router as the "A" router, how would the GRE tunnel handle this scenario?

Thanks,

Steve

[davidjmeier]

I do believe you'd have to do multipoint GRE. Then setup the tunnel on Router B as well... I believe then when A goes down and B assumes 192.168.0.1 that the tunnel would light up to Router C. I've never personally tried / tested this so don't take my word for it. If I get time this next week I'd like to test this in the lab... I will let you know what the outcome is if I get the chance.

Good luck!!!