based on the VLAN switching table without searching the MAC address table. This improves
forwarding efficiency and network security, and prevents broadcast storms and attacks by using
MAC address.
The S7700 supports the following VLAN Switch functions:
l VLAN Switch switch-vlan, which replaces the outer VLAN tag. It is similar to VLAN
mapping and helps implement inter-VLAN communication.
l VLAN Switch stack-vlan, which adds a VLAN tag to single-tagged frames. Similar to
VLAN stacking, it is a technique for adding outer VLAN tags to frames carrying different
inner VLAN tags.
This section describes the VLAN Switch switch-vlan function.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
vlan-switch vlan-switch-name interface interface-type1 interface-number1 vlan vlan-
id1 [ inner-vlan vlan-id2 [ to vlan-id3 ] ] interface interface-type2 interface-
number2 [ switch-vlan vlan-id4 ]
VLAN Switch switch-vlan is configured to replace the outer VLAN tag.
Currently, the S7700 can be configured with a maximum of 4096 VLAN Switch tables. The
system will display an error message if you attempt to configure more VLAN Switch tables.
NOTE
l Ports specified for VLAN Switch must meet the following requirement:
The source and destination ports specified in the vlan-switch command must be hybrid or trunk ports,
but not access ports or Eth-Trunk member ports.
l VLAN IDs specified for VLAN switch must meet the following requirements:
l Any VLAN ID specified in the vlan-switch command cannot be a global VLAN ID. If a VLAN
ID has been applied in VLAN Switch, the VLAN cannot be created in the system view.
l If a specified VLAN ID has been applied in QinQ, this VLAN ID cannot be applied in VLAN
Switch.
l If the outer VLAN ID of a double-tagged frame has been applied in the port vlan-stacking or port
vlan-mapping command or a control VLAN, this VLAN ID cannot be applied in VLAN Switch.
l Currently, you can specify double tags before VLAN switching only on the E-series and F-series boards.
----End
3.5.5 Checking the Configuration
After inter-VLAN communication is configured, you can check whether users in different
VLANs can communicate with each other and check information about VLANs to which users
belong.
Prerequisite
The configurations of inter-VLAN communication are complete.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 3 VLAN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
95
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