> Cat6K and 6880 support QinQ. > We use it to connect some L3 vlans between our DC. > I’m not at my desk, but from memory, .. > 1) on the access port facing the ‘client’ …. > Switchport mode dot1q-tunnel > switchport access vlan xxx. Where xxx is the transport/service provider > side vlan assigned to this client. > 2) add the above ‘xxx’ transport vlan to any dot1q trunks used between client > sites.
Note well the difference between - QinQ: An extra (outer) VLAN tag is added to ingress Ethernet frames which already contain one or more VLAN tags. Example configuration is "switchport mode dot1q-tunnel" + "switchport access vlan X". - Double VLAN tag termination: An Ethernet service (e.g. IP based) is terminated on the Catalyst switch based on both outer (SVLAN) and inner (CVLAN) tags. Example config is "encapsulation dot1Q X second-dot1q Y". As far as I know, Cat 6500 supports the former but not the latter. I have no experience with the 6880. Steinar Haug, Nethelp consulting, [email protected] _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
