3Com S7902E, Configuration Manual

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1-5
Configuring Outer VLAN Tag Priority
By default, when tagging a tagged frame, the S7900E series Ethernet switches copy the priority carried
in the inner VLAN tag to the outer VLAN tag of the frame and uses the priority as the transmission
priority of the frame in the service provider network. When there are a large number of users connected
to the switch and many types of packets, the packet priority you configured may conflict with the data
transmission policy in the service provider network. In this case, you can use the QoS policy function
provided by the S7900E series switch to configure the priority in the outer VLAN tag for frames in the
following two ways:
z
Inner VLAN-to-outer VLAN tag priority mapping: classify traffic based on inner VLAN; configure an
action of marking traffic with outer VLAN tag priority in the traffic behavior.
z
Inner-to-outer VLAN tag priority mapping: classify traffic based on inner VLAN tag priority;
configure an action of marking traffic with outer VLAN tag priority in the traffic behavior.
Protocols and Standards
IEEE 802.1Q: IEEE standard for local and metropolitan area networks: Virtual Bridged Local Area
Networks
Configuring Basic QinQ
Enabling Basic QinQ
Follow these steps to enable basic QinQ:
To do... Use the command... Remarks
Enter system view system-view —
Enter
Ethernet port
view
interface interface-type
interface-number
Enter
Layer-2
aggregate
interface
view
interface bridge-aggregation
interface-number
Enter
interface
view or port
group view
Enter port
group view
port-group { manual
port-group-name | aggregation
agg-id }
Required
Use either command.
z
Settings made in
Ethernet interface view
take effect only on the
current port.
z
Settings made in Layer-2
aggregate interface view
take effect on the Layer-2
aggregate interface and
the member ports in the
aggregation group
corresponding to the
Layer-2 aggregate
interface.
z
Settings made in port
group view take effect on
all ports in the port group.
Enable QinQ on the port(s) qinq enable
Required
Disabled by default