Configuring Vlan Transparent Transmission - 3Com S7906E Configuration Manual

Basic QinQ should be configured on the ports connecting customer networks.
It is recommended that you do not configure QinQ on an RRPP-enabled port, because RRPP
packets may be transmitted to the wrong VLANs, causing RRPP to become invalid. If you really
need to configure QinQ on an RRPP-enabled port, you can configure VLAN mapping on the port
and configure the RRPP control VLANs as the CVLANs and SVLANs at the same time. In this way,
the RRPP packets can skip QinQ operations and continue to be transmitted in the control VLANs.
For detailed information about RRPP control VLANs, refer to the RRPP Configuration in the High
Availability Volume.
Do not configure QinQ on a reflector port. For information about reflector ports, refer to Mirroring
Configuration in the Access Volume.

Configuring VLAN Transparent Transmission

When basic QinQ is enabled on a port, all packets passing through the port will be tagged with the port's
default VLAN tag. However, by configuring the VLAN transparent transmission function on a port, you
can specify the port not to add its default VLAN tag to packets carrying specific inner VLAN tag(s) when
they pass through it, so that these packets are transmitted in the service provider network with single
tags.
Follow these steps to configure VLAN transparent transmission:
To do...
Enter system view
Enter
interface
view or port
group view
Enable QinQ on the port(s)
Configure VLAN transparent
transmission on the port(s)
system-view
Enter
Ethernet or
Layer-2
interface interface-type interface-number
aggregate
interface
view
Enter port
port-group manual port-group-name
group view
qinq enable
qinq transparent-vlan vlan-list
Use the command...
1-6
Remarks
—
Required
Use either command.
Required
Disabled by default
Required
By default, VLAN
transparent
transmission is not
configured.