Netonix Forums

how to enable/config QinQ? I'm not sure if I'm having a problem with mis-configuring the switch, or the VM environment... you guys are a little lite on documentation..

Do a search of QinQ and you find posts like this: viewtopic.php?f=17&t=1033&p=7749&hilit=QinQ#p7749

One of the most common mistakes when using QinQ is not setting your MTU large enough.

Chris, can you just clarify, I need to make a change online and don't want to have an issue


I have a router that is in a 'router on a stick' setup in port1 of the netonix.
Port 1 is Router (RB850Gx2)
Port 7 is Backhaul (AF5X)

VLAN27
Port 1 VLAN 1 'U'
Port 1 VLAN27 'T'
Port 7 VLAN27 'U'

What do I need to change here? I though that changing Port1 VLAN27 to 'Q' would be it, but I'm not allowed to do that on 1.3.9 firmware... I can only change Port1Vlan1 from U -> Q, or Port7VLAN27 from U -> Q

As you know you can only have 1 "U" per port.

In the current form you can only have 1 "U" or "Q" per port.

I am not sure we could allow a "Q" and "U" to assigned on the same port?

I have pinged Eric to weigh in here.

I don't need that. I just need to pass QinQ across VLAN27, which is configured as 'U' on port 7. That seems to be the issue.

If I run a separate VLAN on a link, with both 'T' then I can run QinQ across that just fine. I have a couple places that I can't do that right now though. Mid-transition here so I was looking to QinQ on 1 'T' and 1 'U' port to solve it. I thought that 'Q' was roughly the same a 'U' but didn't strip the QinQ vlans.

Q will strip the outer VLAN Tag OFF
Meaning if a port has a Q on it and a packet is exiting that Q port and the Packet has VLAN Tag 1 inside VLAN Tag 2 the the packet will exit with only VLAN Tag 1 as ID was stripped.

If it is a packet with just VLAN ID 2 and no inner VLAN Tag then the packet will leave the port as an Untaged packet as the only single VLAN Tag was removed exposing an Untaged packet.

A packet entering a Q port will have an outer VLAN Tag installed encapsulating an already VLAN packet inside another VLAN ID

T will pass normal VLAN and QinQ VLANs without stripping the outer VLAN Tag off provided your MTU is large enough for double Tagged QinQ packets.

rebelwireless wrote:VLAN27
Port 1 VLAN 1 'U'
Port 1 VLAN27 'T'
Port 7 VLAN27 'U'

What do I need to change here? I though that changing Port1 VLAN27 to 'Q' would be it, but I'm not allowed to do that on 1.3.9 firmware... I can only change Port1Vlan1 from U -> Q, or Port7VLAN27 from U -> Q

sirhc wrote:As you know you can only have 1 "U" per port.

In the current form you can only have 1 "U" or "Q" per port.

I am not sure we could allow a "Q" and "U" to assigned on the same port?

I have pinged Eric to weigh in here.

What you said you wanted to do was change Port 1 VLAN27 from T to Q but you can not as Port 1 VLAN1 is a U and the UI will NOT allow this.

As I said you can NOT have a U and a Q on the same port, it is either one or the other.

Also as I said I am not sure if we can change this ability so I pinged Eric to respond if we can even allow a Q and U to exist on the same port.

sirhc wrote:Also as I said I am not sure if we can change this ability so I pinged Eric to respond if we can even allow a Q and U to exist on the same port.

We cannot.