09-19-2011 01:21 AM - edited 03-07-2019 02:17 AM
3550-middleswitch-7609
vlan on 3550 and middleswitch conflict, can i config QinQ in middleswitch to passthrough vlans on 3550 to 7609 transparently
thank you!
Tom
09-19-2011 02:24 AM
Hi,
I think QinQ must be configured on the edge switches, not the middle one.
Regards.
Alain.
09-19-2011 04:52 AM
I would disagree, The middle switch would be the one that needs the configurations. If the middle switch supports Q in Q then yes it is possible to configure it. Also you should tag the native vlan on the 3550 and 7609 otherwise traffic on the native vlan will not be tunneled through the middle switch. something like the following would do the trick using vlan 99 to tunnel the traffic:
Middle Switch
int g0/1
description CONNECTS TO 3550
switchport access vlan 99
switchport mode dot1q-tunnel
int g0/2
description CONNECTS TO 7609
switchport access vlan 99
switchport mode dot1q-tunnel
3550 and 7609
enable
conf t
int g0/1
description INTERFACE CONNECTING TO MIDDLE SWITCH
switchport trunk native vlan tag
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