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 is mutually exclusive with EVB. Do not configure both features on a port. For more information about EVB, see EVB Configuration Guide.