From: Carlos G Mendioroz (tron@huapi.ba.ar)
Date: Tue Sep 14 2004 - 08:56:14 GMT-3
Here is a mix that may be useful:
-Tunnel interfaces state follow tunnel destination availability (i.e.
route to destination availability)
-backup can be used to shutdown an interface
You can define something to be the "event" of your ethernet interface
going down. It might be the protocol going down by using backup there,
or you may want to use the new object tracking with a rtr probe.
Then, create a tunnel interface, with destination to a dedicated private
address, that will be available only when your ethernet goes down, and
make your stm-1 interface a tunnel backup. This will shut down the stm-1
when the tunnel comes up.
Eg, if using backup to track fast0/0:
int fast0/0
ip add 172.30.0.1
backup interface lo 0
int lo 0
ip add 10.123.123.1 255.255.255.252
int tun 0
tun source 172.30.0.1
tun dest 10.123.123.2
backup interface atm1/0
The net 10.123.123.0/30 is the dedicated private net used to make the
thing. Not bery elegant, but it works...
12.3T is starting to get more elaborated things to combine tracked
objects and client apps, but no client AFAIK is able to shutdown an
interface yet.
Casey Paul (IE) wrote:
> Hi,
>
> I need to do the following
> A router has two interfaces..
>
> One interface is connected to an stm-1 and the other interface is a fast ethernet interface.
>
> I also have a paralell router with the exact same interfaces sitting right be side it..
>
> Both stm-1 interfaces on both routers are connected to stm-1 mux.. Both ehter interface are coonected to a swith..
>
> One stm-1 is active, - the other is not... Both stm-1 intfaces on both routers have the same ip address..
>
> Note: the stm-1 interfaces can not see each other..(Ie no hsrp) on stm-1 interfaces.. - from transmission side both stm-1 interfaces can't be active at the same time.. its one or the other
>
> If the active fibre fails, the trnasmission is flipped to the other router.. Who's stm-1 is configured and unshut and ready to go..
> the flip over happens and all is well..
>
> If the stm-1 connection is lost between the mux and the active router, the transmission path is flipped over to the other stm-1 in the other router , which becomes active..
>
> The trnasmission flip is reliant on the stm-1 mux identifying loss of signal from the router etc and flipping to the transmission fibre to the other routers stm-1.
>
> Now the problem arrises when an ethernet interface fails on the active router. No loss of signal is detected on the transmission side as it knows nothing about the ethernet interfaces failing. No flip over happens. All it sees is the stm-1 is active and it appears fine.
>
> What I would like happen is if the ethernet interface failed it would shut down the stm-1 interface as well, thus loss of signal would occur on the transmision side and the flip over would happen to the backup stm-1 on the other router...
>
> Is this possible to do..
> If not is there another solution you could propose..
>
> Thanks
> /Paul
> CCIE #13037
>
> Paul Casey
>
> Core Networks
> Technology
> O2 (IRL)
> Phone: +353 1 6096822
> Fax: +353 86 5 8143310
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>
> Email: paul.casey@o2.com
>
>
>
>
>
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-- Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
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