[c-nsp] PVC Bridge

[Bruce Robertson]

Here's an example from my network, across two different ATM cards on the same 
router.  Please note that we consider this to be a hack, and we'd be doing 
pseudowire-type stuff if the IOS we're using would only support 
cross-connecting two PVCs on the same router.  Another thing to know is that 
the fact that the VP/VC matches is just an internal convention we have here; 
this should work even if the VP/VC mismatches.

In theory this would also work to bridge an Ethernet VLAN and an ATM PVC, but 
we haven't tried that yet.  Though we're likely to soon, since we have a need 
for that in our network.

bridge crb
!
interface ATM1/0.192 point-to-point
  bridge-group 21
  bridge-group 21 spanning-disabled
  pvc customer 36/54
!
interface ATM2/0.153 point-to-point
  bridge-group 21
  bridge-group 21 spanning-disabled
  pvc customer 36/54
!


Frank Kempermann wrote:
>  
> Hello,
> 
> I'm searching for a solution to bridge ATM VC's per Layer2. My question is:
> is it possible and how?
> 
> If anyone can give me the right keyword I'll be able to find it at Cisco's
> site by myself, but currently I'm not aware of the right keyword to search
> for.
> 
> At the moment I'm using VRF (Layer3) to do it. This means I pack two or more
> VC's into a VRF. This is working so far, but I'd prefer it without IP.
> 
> I'm using a Cisco 7120 with an ATM E3 module:
> 
> 
> Line 1
> 
>  interface ATM1/0.135 point-to-point
> 
>  description xxxxx
> 
>  mtu 1500
> 
>  ip vrf forwarding xyz
> 
>  ip address 10.10.10.1 255.255.255.252
> 
>  pvc 11.57 11/57 
> 
>   ubr 2300
> 
>   oam-pvc manage 2
> 
>   oam retry 3 3 3
> 
>  
> Line 2
> 
>  interface ATM1/0.136 point-to-point
> 
>  description xxxxxxxxxxxx 
> 
>  mtu 1500
> 
>  ip vrf forwarding xyz
> 
>  ip address 10.10.11.1 255.255.255.252
> 
>  pvc 11.56 11/56 
> 
>   ubr 2300
> 
>   oam-pvc manage 2
> 
>   oam retry 3 3 3
> 
> 
> This two VC's should be bridged directly instead of using IP/VRF. Does
> anyone have a solution for that or isn't it possible at all?
> 
> As always many thanks in advance!
> 
> Frank
> 
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