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Configuration Guide - IP Service

S7700 and S9700 V200R013C00

This document describes the configurations of IP service, including IP address, ARP, DHCP, DNS, mDNS gateway, mDNS relay, UDP Helper, IP performance optimization, IPv6, DHCPv6, IPv6 DNS, IPv6 over IPv4 tunnel and IPv4 over IPv6 tunnel.
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Licensing Requirements and Limitations for mDNS Gateways

Licensing Requirements and Limitations for mDNS Gateways

Involved Network Elements

Other network elements are not required.

Licensing Requirements

mDNS gateway is a basic feature of a switch and is not under license control.

Version Requirements

Table 5-1  Products and versions supporting the mDNS gateway function


Product Model

Software Version


S7703, S7706, and S7712

V200R010C00, V200R011C10, V200R012C00, V200R013C00

S7703 PoE


S7706 PoE



S9703, S9706, and S9712

V200R010C00, V200R011C10, V200R012C00, V200R013C00

For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Feature Limitations

  • A switch cannot function as both mDNS relay and gateway at the same time. A protection failure will occur if the mdns relay enable and mdns gateway enable commands are both configured on the same switch.

  • To prevent high CPU usage, it is recommended that you configure the following when deploying mDNS gateway services: the mDNS group function (using the mdns group group-name, user-vlan vlan-id &<1-32>, and service-vlan vlan-id &<1-32> commands) and the service types that can be recorded by the mDNS gateway (using the mdns permit service-type service-type id id command).

  • If high CPU usage occurs in the MDGW (mDNS gateway) module after the mDNS gateway service is deployed, configure the mDNS group function and the service types that can be recorded by the mDNS gateway to reduce CPU usage. (To check CPU usage, run the display cpu-usage command.)

Updated: 2019-04-20

Document ID: EDOC1100065743

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