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New Member

GRE Tunneling using HSRP

Here's the initial config:

Router A

Interface tunnel1

Tunnel mode gre ip

Tunnel source

Tunnel destination

Router C

Interface tunnel 1

Tunnel mode gre ip

Tunnel source

Tunnel destination

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

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 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?



New Member

Re: GRE Tunneling using HSRP

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 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!!!