[c-nsp] Sup720 + EoMPLS type interworking

[David Freedman]

Gosh, I didn't think that subinterfacing non-OSM ports was possible on 
the catalyst, I wish I had known this earlier.

Since it didn't appear to work on Sup1a/Sup2 I wasn't aware the 
behaviour had changed.

Thanks,

Dave.



Ian Cox wrote:
> To do vlan mode, with Sup7203b/3XL you do the xconnect on sub-interfaces.
> 
> int gig 9/7.100
>   encap dot1q 100
>   xconnect ....
> 
> If you want to carry the entire 1q range of tags between two ports 
> you put the xconnect on the phsyical interface.
> int gig 9/7
>   xconnect ...
> 
> 
> Ian
> 
> 
> At 09:07 AM 3/3/2006 +0000, David Freedman wrote:
>>Question.
>>--------
>>
>>
>>We have the following setup in place.
>>
>>
>>=====802.1q bundle====[PE Router A]
>>                               |
>>                               | MPLS Cloud
>>                               |
>>                        [PE Router B]
>>                            |
>>                            |
>>                           Ethernet port
>>
>>
>>Currently, PE router A is a 7200 NPE-G1 running
>>12.3(10)
>>
>>PE router B is a Catalyst 6500 with a Supervisor2 / MSFC2
>>and a 4GE-WAN-OSM card.
>>This router has its PE->P connection on the OSM which is fine.
>>
>>
>>We receive 802.1q tagged VLAN traffic ingress on PE A
>>from a customer and send it to PE B via EoMPLS to a dedicated router
>>port by carrying the VLAN all the way through (EoMPLS VLAN mode)
>>
>>
>>
>>The way we currently do this is:
>>
>>PE router A:
>>
>>!
>>interface GigabitEthernet0/1.100
>>   encapsulation dot1q 100
>>   description Customer A (vlan 100)
>>   xconnect <PE B> 100 encapsulation mpls
>>!
>>
>>PE router B:
>>
>>!
>>interface vlan 100
>>   description Customer A from PE A (vlan 100)
>>   mpls l2transport route <PE A> 100 vc-type vlan
>>!
>>interface FastEthernet 1/1
>>   description drop for vlan 100
>>   switchport
>>   switchport mode access
>>   switchport access vlan 100
>>!
>>
>>
>>
>>Now, this works fine, if the customer wants to further carry dot1q
>>inside the vlan, we just do this on the access switchport
>>
>>!
>>interface FastEthernet 1/1
>>   description drop for vlan 100
>>   switchport
>>   switchport mode access
>>   switchport access vlan 100
>>   switchport mode dot1q-tunnel
>>!
>>
>>
>>
>>The question comes when we upgrade PE B to Supervisor720 PFC3BXL.
>>
>>  From the earlier discussion that was going on here, you can't do EoMPLS
>>on an SVI without an OSM which we are not planning on using after the
>>upgrade (we want to ditch the 4GE-WAN-OSM as its end of life)
>>
>>
>><the crunch>
>>
>>So, the question really is, how do we transport EoMPLS vlan mode on a
>>Supervisor 720 PFC3BXL without an OSM, considering EoMPLS SVI isn't
>>possible.
>>
>>If we cant do this, how do we use interworking to turn the VC into a
>>"port-mode"  VC?
>>
>>
>></the crunch>
>>
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