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CLI-based Configuration Guide - IP Service

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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Configuring Dynamic Learning of ARP Entries with Multicast MAC Addresses

Configuring Dynamic Learning of ARP Entries with Multicast MAC Addresses

After a device is enabled to learn ARP entries with multicast MAC addresses, it can generate ARP entries for the received ARP packets with multicast MAC addresses as source MAC addresses.

Context

An IP address maps to a multicast MAC address in some service scenarios. For example, as shown in Figure 2-11, the Router connects to the NLB cluster through the Layer 2 switch LSW. The NLB cluster works in multicast mode and has a multicast MAC address as the cluster MAC address. After the Router is enabled to learn ARP entries with multicast MAC addresses, it can generate dynamic ARP entries. This reduces a network administrator's workload and decreases network operation and maintenance costs.
Figure 2-11  Networking diagram for connecting the Router to the NLB cluster through the LSW

Procedure

  • Globally enabling a device to learn ARP entries with multicast MAC addresses
    1. Run system-view

      The system view is displayed.

    2. Run arp learning multicast enable

      The device is globally enabled to learn ARP entries with multicast MAC addresses.

      By default, a device is globally disabled from learning ARP entries with multicast MAC addresses.

      If a device is globally enabled to learn ARP entries with multicast MAC addresses, the interfaces of this device are enabled to learn ARP entries with multicast MAC addresses.

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Updated: 2019-03-06

Document ID: EDOC1100069333

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