[c-nsp] Converting ATM to VLAN

[Clayton Zekelman]

You are of course correct, but that wasn't the question I asked.

At 10:25 AM 3/16/2005, Dan Armstrong wrote:

>A router is not really a layer2 device, and you using it here as a 
>switch.  A WS-X5158 or 5161 LANE card in a 5500 switch does exactly what 
>you want to do en mass...
>
>
>
>Clayton Zekelman wrote:
>
>>I have a situation where I have ATM PVC's coming in (Bridged RFC 1483) 
>>and need to convert it to a VLAN dot1q trunk.  I'm doing this for a 
>>handful of paths, as the ATM enabled router is not the router I need the 
>>path to end up on.  If it were, I'd likely do ATM RBE.
>>
>>I do the following:
>>
>>interface ATM0/0/0.48 point-to-point
>>  description MNS-191+B VLAN 48 IP Transit
>>  bridge-group 48
>>  pvc MNS-191+B 1/70
>>   ubr 12500
>>   encapsulation aal5snap
>>  !
>>!
>>interface FastEthernet0/0/0.48
>>  description MNS-191+B  IP Transit
>>  encapsulation dot1Q 48
>>  bridge-group 48
>>!
>>bridge 48 protocol ieee
>>bridge 48 route ip
>>
>>For some reason, things don't work properly unless I add:
>>
>>interface BVI48
>>  no ip address
>>
>>Can anyone shed any light on why I need to add the BVI?  It *appears* to 
>>do nothing:
>>
>>uacA1#show bridge 48 ver
>>
>>Total of 300 station blocks, 281 free
>>Codes: P - permanent, S - self
>>
>>BG Hash      Address      Action  Interface      VC    Age   RX 
>>count   TX count
>>48 5F/0   0005.5ea1.5f00 
>>forward  Fa0/0/0.48      -      0     885110     892382
>>48 CC/0   00d0.ffb5.cc00 
>>forward  ATM0/0/0.48     15     0     892633     884682
>>
>>Flood ports (BG 48)          RX count    TX count
>>ATM0/0/0.48                       249         213
>>FastEthernet0/0/0.48              213         249
>>
>>The strange thing is, when we cut over, it worked fine without the BVI 
>>for an hour or two, then the whole thing went down, and wouldn't come 
>>back up until I added the BVI.
>>
>>
>>
>>---
>>Clayton Zekelman
>>Managed Network Systems Inc. (MNSi)
>>344-300 Tecumseh Rd. E.
>>Windsor, Ontario
>>N8X 5E8
>>
>>tel. 519-985-8410
>>fax. 519-258-3009
>>
>>
>
>
>
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---
Clayton Zekelman
Managed Network Systems Inc. (MNSi)
344-300 Tecumseh Rd. E.
Windsor, Ontario
N8X 5E8

tel. 519-985-8410
fax. 519-258-3009 


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