H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 129)

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Configuring VLAN termination
Support for VLAN termination may vary depending on your device model. For more information, see
About the WX Series Access Controllers Configuration Guides.
VLAN termination assigns a VLAN-tagged packet received to the corresponding interface according to
its VLAN tags, and then the interface removes its VLAN tags, and then forwards it via Layer 3 or
processes it in other ways. Whether the packet is tagged before being sent out depends on the
configuration of the outgoing interface. Before sending a packet, the port adds a VLAN tag to the packet
according to the VLAN termination configuration on the port.
QinQ termination terminates packets which carry two or more layers of VLAN tags and whose outermost
two layers of tags match the configured values. Packets sent out a QinQ termination interface are
double-tagged.
NOTE:
In this chapter, for a packet that carries two or more layers of VLAN tags, the outermost layer of VLAN
tags is called “Layer 1 VLAN tag,” and the second outermost layer of VLAN tags is called “Layer 2 VLAN
tag.” This also applies to VLAN IDs.
Application scenarios
Inter-VLAN communication
Hosts in different VLANs cannot directly communicate with each other. You can use Layer 3 routing to
allow all VLANs to communicate. To allow the specified VLANs to communicate, you can configure
VLAN termination on VLAN interfaces.
In
Figure 33 , Host A belongs to VLAN 2, and Host B belongs to VLAN 3. After you specify Host A’s
gateway IP address as 1.1.1.1/24 and Host B’s gateway IP address as 1.1.2.1/24 and configure VLAN
termination, Host A and Host B can communicate at Layer 3 through VLAN interfaces.