[c-nsp] Layer 2 local switching for QinQ circuits

[David Freedman]

Rolf Mendelsohn wrote:
> Hi Guys,
> 
> Worst case (slightly temporary) solution would be to carefully configure an 
> exit for the QinQ domain into the 802.1q domain and put a crossover cable 
> from one port to another.

How would you do this?
Its an 72xx NPE-G1 not a switch so can only rely on lconnect (not 
working) or bridging (reluctant to try)

I've seen suggestion of l2tpv3 PWE over loopbacks to try this but have 
never managed to get this to work (and suspect it shouldn't!)

Dave.

> 
> Unless of course you have a big overlap of regular vlan's.
> 
> cheers
> /rolf
> 
> On Monday 21 May 2007 10:31:17 David Freedman wrote:
>> Bridging was also suggested, but I dont think this would be suitable
>> since we are talking about a couple of 100 Megs of traffic with lots of
>> multicast :)
>>
>> Does anybody know what kind of performance gain provided by using l2
>> local switching over bridging?
>>
>> I can't find much documentation on this, I'm assuming that because
>> l2 local switching was developed with CEF in mind it should have bad
>> things about it, but I could be wrong...
>>
>> Dave.
>>
>> David Freedman wrote:
>> > Anybody know when this will be available?
>> >
>> > Currently does not work in 12.2(28)SB6 on 72xx
>> >
>> > !
>> > int g0/3.28100
>> >   encaps dot1q 28 second-dot1q 100
>> > !
>> > int g0/3.28150
>> >   encaps dot1q 28 second-dot1q 150
>> > !
>> >
>> > (config)#connect foo Gi0/3.28100 Gi0/3.28150
>> > QinQ not supported on GigabitEthernet0/3.28100
>> > %CONN: invalid segment 1
>> > %CONN: Invalid Command
>> >
>> > Many thanks
>> >
>> > David Freedman
>> >
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> 
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