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Community Member

RSPAN with Q-in-Q tunneling

I'm trying to set up an RSPAN between two sites. The Main site and remote site are linked through a WAN connection provided by Time Warner. TW says the connection uses Q-in-Q tunneling between the 2 sites.

I understand that for RSPAN to work, the remote span VLAN needs to be defined on each switch. So does that mean that TW has to define my remote span VLAN on their equipment since they are using Q-in-Q tunneling?

2 REPLIES
Hall of Fame Super Silver

Re: RSPAN with Q-in-Q tunneling

Hello Steven,

>> So does that mean that TW has to define my remote span VLAN on their equipment since they are using Q-in-Q tunneling?

No, thanks to QinQ they don't care about the inner vlan tag they just examine the external customer vlan-id.

you still need to add the rspan vlan on your devices to be permitted on your devices' trunks.

Actually QinQ doesn't allow to filter what vlans to accept or not.

So you should use

switchport mode trunk

switchport trunk allowed vlan

you can add a vlan with

switchport trunk allowed vlan add x

Hope to help

Giuseppe

Community Member

Re: RSPAN with Q-in-Q tunneling

Thanks Guiseppe. I'm still having trouble getting the RSPAN to work but at least I know I can eliminate that as a possible cause.

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