VLAN Solution

Unanswered Question
Jan 13th, 2009

Hi Gurus,

Im not sure if QinQ is applicable here. Im worried i will use my 4000+ vlan on my metro. Is this applicable using subinterface on router? Please see my diagram.


I have this problem too.
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cisco_lad2004 Wed, 01/14/2009 - 06:51

That should be possible, but where would you terminate VLAN2, 3 & 4 ?

It is possible to terminate these vlans on the router if the latter supports double tagged subif like 7206 for example.

since you have 3 edge switches pushing same inner tagged vlans, you will need to consider secondary IPs (I have not tested this part).


Router(config-subif)# encapsulation dot1q 100 second-dot1q 2.

If you are planning on using ACL on Router, PVLAN would be useful in this scenario to take care of L2 cross talk.




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