[c-nsp] VLAN retag on Cisco 7600 + ES

[Vitkovsky, Adam]

Hi,
Now I'm not sure whether you should push 2 or just 1 -or you can use the last one

interface Gi1/0/0
 description TO-3750G
 service instance 123 ethernet
  description Customer VLAN 123
  encapsulation dot1q 123
  rewrite ingress tag push dot1q 1248 symmetric
  or
  rewrite ingress tag push dot1q 123 second-dot1q 1024 symmetric
  or
  rewrite ingress tag translate 1-to-2 dot1q 123 second-dot1q 1248 symmetric
  bridge-domain 12


"symmetric" keyword  -Tags egress packets as specified in encapsulation

-drawback of this type of tag manipulation is that you obviously can only have 1 vlan per service instance


adam
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tord Førland
Sent: Friday, November 25, 2011 10:36 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] VLAN retag on Cisco 7600 + ES

Hi group!

I need some input on how to provision QinQ sub-interfaces on a 7600 ES interface, but strip the outer tag outbound, and add it inbound. 

Cisco 7600 <-> Cisco 3750G

The 3750G can only see a normal dot1q trunk, but due to VLAN limitations on the 7600, I have to use a single transport tag for all customer sub-interfaces on the ES interface, hence the need for QinQ. 

Gi1/0/0 has been assigned VLAN 1248 for all customers to be provisioned on that Interface. Is it possible to use 7600 magic to strip the outer tag egress, and add it ingress?  Could "service instance" be used to handle this?

Router is running SRE3.

Any input appreciated!

BR Tord


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