Context
VLANs configured based on IP subnets process only untagged frames. and treat tagged frames
in the same manner as VLANs configured based on ports.
After receiving untagged frames, a device determines the VLANs to which the frames belong
based on their source IP addresses before sending them to corresponding VLANs.
The configuration roadmap is as follows:
1. Create VLANs.
2. Associate IP subnets with VLANs to determine mappings between subnets and VLANs.
3. Configure the port type and features.
(1) Set the port type to hybrid.
(2) Configure a port to allow frames with the specified VLAN IDs to pass through.
4. (Optional) Set a higher priority for IP subnet-based VLAN division.
NOTE
By default, MAC address-based VLAN division is set as the preference. To use IP subnet-based
VLAN division, set a higher priority for it.
5. Enable IP subnet-based VLAN division.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
vlan vlan-id
A VLAN is created, and the VLAN view is displayed. If the specified VLAN has been created,
the VLAN view is directly displayed.
The VLAN ID ranges from 1 to 4094. If VLANs need to be created in batches, run the vlan
batch { vlan-id1 [ to vlan-id2 ] } &<1-10> command to create VLANs in batches, and then run
the vlan vlan-id command to enter the view of a specified VLAN.
Step 3 Run:
ip-subnet-vlan [ ip-subnet-index ] ip ip-address { mask | mask-length }
[ priority priority ]
An IP subnet is associated with the VLAN.
l The optional parameter ip-subnet-index specifies the IP subnet index. The subnet index can
be specified by a user or automatically generated by the system.
l The parameter ip-address specifies the source IP address or network address based on which
a VLAN is configured. The value is in dotted decimal notation.
l The optional parameter priority specifies the 802.1p priority value related to the VLAN
configured based on the IP address or network address. The value ranges from 0 to 7. The
greater the value, the higher the priority. The default value is 0. After the 802.1p priority
value is specified, frames with high priorities are first forwarded when traffic is congested.
Step 4 Run:
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.
82
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