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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 Multi-Interface ARP

Configuring Multi-Interface ARP

Context

After multi-interface ARP is configured, a device can send the packet destined for the cluster IP address to each server in the NLB cluster. All servers in an NLB cluster use the same cluster IP address and cluster MAC address. When a device is directly connected to NLB servers and functions as their access gateway, the device sends a packet from clients to the cluster IP address, where it is forwarded to every server in the NLB cluster. The servers themselves determine whether to process the packet.

NOTE:

The ES0D0G24SA00 and ES0D0G24CA00 cards cannot be connected to a client or an NLB cluster.

The SA series cards (except the EH1D2X12SSA0 and ET1D2X12SSA0 cards) do not support multi-interface ARP.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Configure a static MAC address entry mapping multiple outbound interfaces.

    NOTE:

    The VLAN specified in the following steps cannot be a MAC VLAN, super VLAN, leased line VLAN, MUX VLAN on the X series cards, or control VLAN of Smart Ethernet Protection (SEP) and Rapid Ring Protection Protocol (RRPP).

    • When the NLB cluster works in unicast or multicast mode, you can use either of the following methods to configure a static MAC address entry mapping multiple outbound interfaces.

      If the MAC address entry mapping multiple outbound interfaces is configured for the first time, run commands in the system view. If the MAC address entry mapping multiple outbound interfaces has been created and a certain interface needs to be added or deleted, run commands in the corresponding interface view.

      • Configuring a MAC address entry mapping multiple outbound interfaces in the system view

        Run the mac-address multiport mac-address interface { interface-type interface-number1 [ to interface-type interface-number2 ] } &<1-10> vlan vlan-id command to configure the MAC address entry mapping multiple outbound interfaces in the system view.

        By default, no MAC address entries on the device map multiple outbound interfaces.

        The interfaces mapping a MAC address entry must be located on the same card. The value of interface-number2 must be greater than that of interface-number1, and interface-number1 and interface-number2 determine an interface range.

        NOTE:

        When the outbound interfaces are Eth-Trunk interfaces, you must run the unknown-unicast load-balance enhanced command to configure the load balancing mode for unknown unicast traffic on the interfaces. Otherwise, the configuration is invalid.

      • Configuring a MAC address entry mapping multiple outbound interfaces in the interface view

        1. Run interface interface-type interface-number

          The interface view is displayed.

        2. Run mac-address multiport mac-address vlan vlan-id

          The MAC address entry mapping multiple outbound interfaces is configured in the interface view.

          By default, no MAC address entries on the device map multiple outbound interfaces.

        3. Run quit

          Return to the system view.

        Repeat the preceding steps on each outbound interface so that a MAC address in the MAC address table can map multiple outbound interfaces.

  3. Run arp static ip-address mac-address [ vpn-instance vpn-instance-name ]

    The short static ARP entry is configured.

    By default, the ARP table is empty and address mappings are obtained using dynamic ARP.

    The value of mac-address must be the same as the MAC address in the MAC address entry mapping multiple outbound interfaces.

Verifying the Configuration

  • Run the display mac-address multiport mac-address vlan vlan-id or display mac-address multiport [ vlan vlan-id ] [ total-number ] command to display the MAC address entry mapping multiple outbound interfaces.
  • Run the display arp static command to verify static ARP entries.
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Updated: 2019-04-20

Document ID: EDOC1100065743

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