nanog mailing list archives
Re: Q-In-Q using M7i and CISCO Switch
From: sthaug () nethelp no
Date: Wed, 01 Sep 2010 08:34:55 +0200 (CEST)
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
Current thread:
- Q-In-Q using M7i and CISCO Switch Giuliano Cardozo Medalha (Aug 31)
- Re: Q-In-Q using M7i and CISCO Switch sthaug (Aug 31)