Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Do all switches have to support QinQ?

If I have three switches in a line like below, and port fa0/1 on Sw1 is for vlan 10, which is trunked to fa0/1 on Sw3,

Sw1  --- Sw2 --- Sw3

If I wanted more VLANs between these ports I could set up a QinQ tunnel but switch 2 doesn't support this, does this matter? Do all switches in a QinQ chain have to support QinQ or will they simply read the outter tag and pass the frames blindly?

Many thanks.

Everyone's tags (1)
1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Bronze

Re: Do all switches have to support QinQ?

For Q-in-Q, only the switches directly connected to the CEs will need it.

The transit switches must have the customer Vlan in their databases and the Vlan(s) must be in forwarding state / not pruned.

2 REPLIES
Hall of Fame Super Bronze

Re: Do all switches have to support QinQ?

For Q-in-Q, only the switches directly connected to the CEs will need it.

The transit switches must have the customer Vlan in their databases and the Vlan(s) must be in forwarding state / not pruned.

New Member

Do all switches have to support QinQ?

Thank you for the prompt response

364
Views
0
Helpful
2
Replies