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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R011C10

This document describes the configuration of Ethernet services, including configuring link aggregation, VLANs, Voice VLAN, VLAN mapping, QinQ, GVRP, MAC table, STP/RSTP/MSTP, SEP, and so on.
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Configuring IP Subnet-based VLAN Assignment

Configuring IP Subnet-based VLAN Assignment


Both IP subnet-based and protocol-based VLAN assignment are called network layer-based VLAN assignment, which reduces manual VLAN configuration workload and allows users to easily join a VLAN, transfer from one VLAN to another, and exit from a VLAN. IP subnet-based VLAN assignment applies to scenarios where there are high requirements for mobility and simplified management and low requirements for security, for example, scenario where a PC configured with multiple IP addresses needs to access servers on different network segments and scenario where the switch adds PCs to other VLANs when the PCs' IP addresses change.

The switch that has IP subnet-based VLAN assignment enabled processes only untagged frames, and treats tagged frames in the same manner as interface-based VLAN assignment.

After receiving untagged frames from an interface, the switch determines the VLANs to which the frames belong according to source IP addresses or network segments and transmits the frames in specified VLANs.


  1. Run system-view

    The system view is displayed.

  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 a batch, run the vlan batch { vlan-id1 [ to vlan-id2 ] } &<1-10> command to create VLANs in a batch, and then run the vlan vlan-id command to enter the view of a specified VLAN.


    If a device is configured with multiple VLANs, configuring names for these VLANs is recommended:

    Run the name vlan-name command in the VLAN view. After a VLAN name is configured, you can run the vlan vlan-name vlan-name command in the system view to enter the corresponding VLAN view.

    The vlan configuration command completes the VLAN configuration when the VLAN is not created.

  3. Run ip-subnet-vlan [ ip-subnet-index ] ip ip-address { mask | mask-length } [ priority priority ]

    An IP subnet is associated with a VLAN.

    • ip-subnet-index specifies the index of an IP subnet. The index of an IP subnet can be configured manually or automatically generated by the system according to the sequence in which IP subnets were associated with a VLAN.

    • ip-address specifies the source IP address or network segment associated with a VLAN. The value is in dotted decimal notation.

    • priority specifies the 802.1p priority of a VLAN associated with an IP address or a network segment. The value ranges from 0 to 7. A larger value indicates a higher priority. The default value is 0. After the 802.1p priority of a VLAN associated with an IP address or a network segment is specified, the switch first forwards high-priority frames in the case of congestion.

    • The switch supports a maximum of 256 network segments and each VLAN supports a maximum of 12 network segments.

  4. Run quit

    Return to the system view.

  5. Configure attributes for the Ethernet interface.

    1. Run interface interface-type interface-number

      The view of the Ethernet interface to be added to the VLAN is displayed.

    2. Run port link-type hybrid

      The interface is configured as the hybrid interface.

      On access and trunk interfaces, IP subnet-based VLAN assignment can be used only when the IP subnet-based VLAN is the same as the PVID. It is recommended that IP subnet-based VLAN assignment be configured on hybrid interfaces.

    3. port hybrid untagged vlan { { vlan-id1 [ to vlan-id2 ] } &<1-10> | all }

      The hybrid interface is configured to allow the IP subnet-based VLAN.

  6. (Optional) Run vlan precedence ip-subnet-vlan

    The device is configured to preferentially use IP subnet-based VLAN assignment.

    By default, the device preferentially uses MAC address-based VLAN assignment.


    The vlan precedence command is not supported on the X series cards.

  7. Run ip-subnet-vlan enable

    IP subnet-based VLAN assignment is enabled.

    By default, IP subnet-based VLAN assignment is disabled.


    IP subnet-based VLAN assignment is invalid for packets with the VLAN ID of 0 on the X series cards.

Verifying the Configuration

  • Run the display ip-subnet-vlan vlan { all | vlan-id1 [ to vlan-id2 ] } command in any view to check information about IP subnets associated with VLANs.
  • Run the display vlan command in any view to check information about VLANs.
Updated: 2019-10-18

Document ID: EDOC1000178310

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