Q-In-Q using M7i and CISCO Switch

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1

People,

We have a client with the following situation:

                                                             v1, v2, v3
  -------| Switch | ----------| Switch |----------------| Switch>------------- JUNIPER M7i IQ2E -----

Carrier offers only 3 vlans to the client. But he wants to push some more vlans inside the 3 ones.

It is possible to initiate and finish Q-In-Q vlans using a cisco ME switch and a JUNIPER M7i with IQ2E interface ?

The following link shows stack configuration. It can be used to do Q-In-Q with this situation ?

http://www.juniper.com.lv/techpubs/en_US/junos10.0/information-products/topic-collections/config-guide-network-interfaces/id-12155750.html

Someone tries to configure it any time ?

Thanks a lot,

Giuliano

2

We have a client with the following situation:

                                                             v1, v2, v3
  -------| Switch | ----------| Switch |----------------|
Switch>------------- JUNIPER M7i IQ2E -----

Carrier offers only 3 vlans to the client. But he wants to push some
more vlans inside the 3 ones.

It is possible to initiate and finish Q-In-Q vlans using a cisco ME
switch and a JUNIPER M7i with IQ2E interface ?

The following link shows stack configuration. It can be used to do
Q-In-Q with this situation ?

http://www.juniper.com.lv/techpubs/en_US/junos10.0/information-products/topic-collections/config-guide-network-interfaces/id-12155750.html

Someone tries to configure it any time ?

You need to differentiate between *terminating* a dual tagged VLAN, and
the operation of pushing/popping a VLAN tag. M7i with IQ2E kan do either.

Note that you are *not* guaranteed that a carrier which offers a VLAN
transport service will automatically handle dual tagged VLANs - this must
be verified. Note also the obvious MTU implication of a 4 byte additional
VLAN tag.

You might be better off discussing this on the juniper-nsp list.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no