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Rewriting vlan tags

Hi there,

I have a port on a Cat 6509 in mode trunk :

Interface Gigabit1/1

switchport

switchport mode trunk

switchport trunk allowed vlan 10,20

!

Is it possible for me to rewrte theese tags (10,20) to 11 and 21, so that I can have vlan interface for each of them on the 6509?

So instead of:

Interface vlan 10

ip address 10.10.0.1 255.255.255.0

!

Interface vlan 20

ip address 10.10.0.1 255.255.255.0

!

the vlans recieved on the trunk should be rewritten to: 10->11, 20->21

Interface vlan 11

ip address 10.10.0.1 255.255.255.0

!

Interface vlan 21

ip address 10.20.0.1 255.255.255.0

!

So 10.10.0.1/24 and 10.20.0.1/24 is reachable on Gig1/1 on vlan 10 and 20.

Is this possible and how?

Note: I have SUP720 and some GigE line cards in the Cat 6509....

Please advice! :-D

4 REPLIES

Re: Rewriting vlan tags

Philip,

As far as I know - there are two options:-

1) 802.1q-in-q tunneling

http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_ieee_802.1q.html

2) Ethernet over MPLS - VLAN ID rewrite

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/atom25s.html

HTH>

Re: Rewriting vlan tags

Re: Rewriting vlan tags

Very nice - that's one for my tool kit.

A day is not wasted if you learn something new!

Re: Rewriting vlan tags

Hi ryan,

deserves rating!!!! thnx i was unaware 'bot that. :)

regards,

shri!!!

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