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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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Configuring a Primary IP Address for the IP Numbered Interface

Configuring a Primary IP Address for the IP Numbered Interface


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number[.subinterface-number]

    The interface view or sub-interface view is displayed.

    IP unnumbered interfaces can borrow IP addresses from interfaces including Ethernet, loopback, and VLANIF interfaces, and Ethernet sub-interfaces.

    • Only the E series, X series, F series, and SC series cards on the S7700 and S9700 support Ethernet sub-interface configuration. For details about the cards, see Cards in the Hardware Description.

    • Only hybrid and trunk interfaces on the preceding series of cards support Ethernet sub-interface configuration.
    • After you run the undo portswitch command to switch Layer 2 interfaces on the preceding series of cards into Layer 3 interfaces, you can configure Ethernet sub-interfaces on the interfaces.

    • The SA series cards do not support Ethernet sub-interface configuration and cannot forward IP traffic to Ethernet sub-interfaces on other cards.

    • You are advised to add a member interface to an Eth-Trunk and then configure an Eth-Trunk sub-interface. The Eth-Trunk sub-interface can be successfully configured only when the card on which the member interface locates supports Ethernet sub-interface configuration.

    • VLAN termination sub-interfaces cannot be created on a VCMP client.

  3. (Optional) On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

  4. Run ip address ip-address { mask | mask-length }

    A primary IP address is configured for the interface.

    Each interface has only one primary IP address. If you configure a new primary IP address for an interface, the original one is deleted and the new primary IP address takes effect.

Updated: 2019-04-20

Document ID: EDOC1100065743

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