Can MFF and VLAN mapping be configured simultaneously on the switch


In V100R006 and later versions, the switch supports combination of 1:1 VLAN mapping and MFF. MFF can be configured in translated VLANs of VLAN mapping entries.

Other related questions:
What is the difference for global vlan mapping on different Switch?
The global VLAN Mapping means that configure Vlan Mapping in vlan view. Only S2700EI、S3700EI and S3700SI can support globlal VLAN Mapping,others can not support. All the S2700EI Switch can not support global Vlan Mapping and interface Vlan Mapping at the same time except S2750EI. S3700EI and S3700SI can support them at the same time.

What are the limitations for configuring VLAN mapping on the S2700
A maximum of 16 VLANs can be mapped on an interface. The C-VLAN ID must be different from the value obtained through the modulo operation against 128 on the VLAN allowed by the interface (VLAN ID mod 128); otherwise, a conflict occurs. For example, if the interface allows VLAN 130 to pass, the result of VLAN ID mod 128 is 2. In this case, the C-VLAN ID cannot be set to 2. The S2700SI does not support VLAN mapping.

What are the precautions for configuring N:1 VLAN mapping
The S2752 and S3700 do not support N:1 VLAN mapping. N:1 VLAN mapping cannot be configured with port security or MAC address learning disabling. The interface configured with N:1 VLAN mapping cannot process unknown unicast, broadcast, and multicast return traffic.

What are precautions for configuring VLAN mapping on multiple interfaces of the switch
When configuring VLAN mapping on multiple user-side interfaces, do not map different C-VLAN IDs to the same S-VLAN ID. Otherwise, traffic sent from a user-side interface may be forwarded to another user-side interface that has the same S-VLAN ID configured.

When ARP rate suppression is configured and MFF is enabled in the VLAN on S series switches, can the rate of ARP packets processed by the MFF module be suppressed
For S series switches: In versions earlier than V200R001, the switch limits only the rate of ARP packets destined to the switch. Therefore, the switch does not limit the rate of ARP packets processed by the MFF module (ARP packets destined to other devices). In V200R001 and later versions, the switch checks the VLAN ID in an ARP packet to determine whether MFF is enabled in the VLAN. If MFF is enabled in the VLAN, the switch limits the rate of the ARP packet and then the MFF module processes the ARP packet.

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