H3C Technologies H3C S5560 Series Switches - Manual (Page 251)

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Figure 68 Two-to-two VLAN mapping implementation
General configuration restrictions and guidelines
When you configure VLAN mapping, follow these restrictions and guidelines:
• When you configure one-to-two VLAN mapping on a QinQ-enabled port, the switch operates as
follows:
{
If a packet matches the one-to-two VLAN mapping, the switch tags the packet with the SVLAN
that is specified in the VLAN mapping.
{
If a packet does not match the one-to-two VLAN mapping, the switch tags the packet with the
PVID.
• When you configure one-to-one or many-to-one VLAN mapping on a QinQ-enabled port, the
switch operates as follows:
{
If a packet matches the one-to-one or many-to-one VLAN mapping, the switch replaces the
CVLAN tag with the SVLAN tag specified in the VLAN mapping.
{
If a packet does not match the one-to-one or many-to-one VLAN mapping, the switch tags the
packet with the PVID.
For more information about QinQ, see "Configuring QinQ."
• You can configure both VLAN mapping and a QoS policy for VLAN tagging. The QoS policy takes
effect if a configuration conflict occurs. For information about QoS policies, see ACL and QoS
Configuration Guide.
VLAN mapping configuration task list
IMPORTANT:
Use the appropriate VLAN mapping methods for the devices in the network.
To configure VLAN mapping:
Tasks at a glance Remarks
Configuring one-to-one VLAN mapping
Configure one-to-one VLAN mapping on the
wiring-closet switch, as shown in
Figure 62 .
Network-side port Customer-side port Uplink traffic Downlink traffic
Customer
network
SP network
SVLAN Data CVLAN
SVLAN Data CVLAN
Two-to-two VLAN
mapping
Data CVLAN’ SVLAN’
Data CVLAN’ SVLAN’