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From: Rob on 10 Aug 2010 08:17
We have a branch router connected to the head office via two
VPN tunnels. One is via ADSL and the other via SDSL.

There are two DMVPN tunnels over IPsec. Eigrp is running for
the routing. The ADSL has been configured with a higher bandwidth
than the SDSL, so the automatic route favours the ADSL based
tunnel, but when it fails the tunnel over SDSL is used.

For VOIP traffic, a few static routes are installed that route
the VOIP traffic over the SDSL based tunnel. This is possible
because the VOIP traffic is in a separate subnet.

This works fine except for one situation: when the SDSL is down,
there is no VOIP traffic possible because of the static routes.

I would like to add "... track ..." to the static routes and
make them disappear when the SDSL is down, so it falls back to
the ADSL.

Is it possible to setup tracking so that it directly tracks the
up/down state of the tunnel interfaces?
Or is it always required to setup a pinging mechanism like I
see in the examples?
The pinging requires tricks with local policy etc because if
the SDSL is down the remote end of the tunnel can be pinged via
ADSL (the eigrp switches over that route to the ADSL).
Directly tracking the up/down state of the tunnel would be
easier, I suppose?
From: Martin Gallagher on 11 Aug 2010 05:42
Rob wrote:

>
> Is it possible to setup tracking so that it directly tracks the
> up/down state of the tunnel interfaces?

Sort of like:

Tracking the Line-Protocol State of an Interface
http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/fthsrptk.html#wp1065858

--
Rgds,
Martin
From: Rob on 11 Aug 2010 07:06
Martin Gallagher <mgallagh(a)zeta.org.au> wrote:
> Rob wrote:
>
>>
>> Is it possible to setup tracking so that it directly tracks the
>> up/down state of the tunnel interfaces?
>
> Sort of like:
>
> Tracking the Line-Protocol State of an Interface
> http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/fthsrptk.html#wp1065858

Thanks!
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