we don't support bridging over GRE tunnels (you can configure it) but
it's behavior is unpredictable. what kind of OSI traffic do you
plan to pass? you can configure clns/isis on GRE tunnels and enable
the router for clns routing. i have never done this myself, so don't
know if it will work. but looking around the stuff to support clns/isis
over GRE tunnels is there. if it's some traffic that you want
passed transparently trough the router, you may want to think about
running DLSW/RSRB between your 2 end points.
regards
.siva
On Tue, 19 Jun 2001, Maik Bachmann wrote:
>
> Hi *,
>
>
> is there a way to bridge some kind of traffic "into" a tunnel interface?
>
> The situation is as follows:
>
> ----eth-ROUTER_A-ser---------------------ser-ROUTER_B-eth---------
>
> Router_a and Router_B are 2621 with c2600-is-mz.120-7.T.bin.
> Traffic coming to A (thru eth if) is OSI traffic, which I want to
> tunnel to B. On B's eth there is another OSI device to connect to.
>
> The line between A and B is IP over SDH, so no way to bridge
> via FR or ATM VCs. Basic bridging is also not possible due to some issues
> by the carrier who filters that traffic (SDH managment data).
>
>
> The obvious solution would be:
> Router_A:
>
> interface eth0
> ip address 1.1.1.1 ....
> bridge group 1
> ....
>
> interface ser0
> ip address 2.1.1.1 ...
> ....
>
> interface tunnel0
> source 2.1.1.1
> destination 2.1.1.2
> bridge-group 1
>
> bridge protocol dec
>
> similar on Router_B......
>
> But .... no way to use bridge-group 1 on tunnel interfaces.
> In some way this sounds sensible since bridging doesn't touch the packet
> where tunnel touches (encaps in IP) it.
>
> On the other side - there must be some way to tunnel *any kind of junk*
> coming in.
>
> Start and endpoints of the tunnel interfaces may be the eth interfaces
> as well - but I found no way to tie the physical interface with the
> tunnel interface.
>
> Any ideas?
>
> TIA
> ---Maik
>
>
> --
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