[c-nsp] Sup720 + EoMPLS type interworking

[Ian Cox]

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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