[j-nsp] GRE Keepalive problem

[Erdem Sener]

Youssef,

 As long as you have a route information towards your tunnel
destination (including the default 0/0), your interface will stay up
since there are no GRE keepalive mechanisms.

 As a workaround against link failures, I would suggest configuring a
dynamic routing protocol using tunnel interfaces on both ends and rely
on that protocol's keepalives to detect link failures.

 Of course, you'll need to be careful and avoid possible loops while doing that.

 Hope this helps,
 Erdem

On 7/25/07, Youssef Yosry <yyosry at salec.com> wrote:
> Hi All,
>
>
>
> I did create a GRE tunnel between to J4300 routers over ISP network, but I
> did found that when the physical interface on one side went down the GRE
> tunnel interface on the opposite side is still UP. So is there some kind of
> keepalive over GRE so when missing these keepalive the GRE became down.
>
>
>
> Please advice.
>
>
>
>
>
> Best Regards,
>
>
>
> Youssef Yosry
>
> System Engineer, Core Switching Products
>
>
>
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp
>