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Configuration Guide - Ethernet Switching

S7700 and S9700 V200R012C00

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, HVRP, and Layer 2 protocol transparent transmission.
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Enabling the MUX VLAN Feature on a Port

Enabling the MUX VLAN Feature on a Port


Enable the MUX VLAN feature to implement the following characteristics:
  • Allow principal VLAN and subordinate VLAN to communicate with each other.
  • Allow ports in a group VLAN to communicate with each other.
  • Disallow ports in a separate VLAN to communicate with each other.

Pre-configuration Tasks

Before enabling the MUX VLAN function, ensure that the interface has been added to a principal or subordinate VLAN as an access, hybrid, or trunk interface.


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run port link-type { hybrid | access | trunk }

    The link type of the port is set.

  4. Run port mux-vlan enable vlan { vlan-id1 [ to vlan-id2 ] } &<1-10>

    The MUX VLAN feature is enabled on the port.

    After the MUX VLAN feature is enabled on a port, VLAN mapping or VLAN stacking cannot be configured on the port.

    You cannot create a VLANIF interface for a subordinate group VLAN or separate VLAN. However, you can create a VLANIF interface for a principal VLAN. If a VLANIF interface is created for a principal VLAN, you cannot run the port mux-vlan enable vlan vlan-id command on an interface of the ES0D0G24SA00, ES0D0G24CA00, EH1D2G24SSA0, and EH1D2S24CSA0 cards of SA series to enable the MUX VLAN function including the principle and subordinate VLANs.

    The port mux-vlan enable command is not supported on a negotiation-auto or negotiation-desirable port.

    • Disabling MAC address learning or limiting the number of learned MAC addresses on a port will compromise the performance of the MUX VLAN feature.

    • MUX VLAN and port security cannot be configured on the same port.

    • MUX VLAN and MAC address authentication cannot be configured on the same port.

    • MUX VLAN and 802.1x authentication cannot be configured on the same port.

    • If a DHCP server is configured in the subordinate VLAN and DHCP clients are configured in the principal VLAN, the DHCP clients may fail to obtain IP addresses. Therefore, when the DHCP snooping function is configured, configure the DHCP server in the principal VLAN.

Updated: 2019-01-18

Document ID: EDOC1100038843

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