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Configuration Guide - IP Service

S2720, S5700, and S6720 V200R013C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DHCP policy VLAN, 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 the Trap Function for Hash Conflicts of ND Entries

Configuring the Trap Function for Hash Conflicts of ND Entries

Context

After the trap function for hash conflicts of ND entries is configured, the switch sends traps when a hash conflict of ND entries occurs so that you can obtain the status of ND entries promptly. ND entry resources are key resources on the switch. Monitoring the ND entry status effectively ensures proper running of the switch.

To improve the IPv6 forwarding performance, the switch saves ND entries using hash links. When multiple ND entries obtain the same key based on the hash algorithm, the ND entries cannot be saved. This is a hash conflict of ND entries.

When a hash conflict of ND entries occurs, the switch has available ND entry space but cannot save ND entries. The switch cannot forward IPv6 traffic matching the ND entries with a hash conflict.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run nd trap hash-conflict enable

    The trap function for hash conflicts of ND entries is enabled.

    By default, the trap function for hash conflicts of ND entries is enabled.

  3. (Optional) Run nd trap hash-conflict interval interval-time

    The interval at which the switch reports traps when a hash conflict of ND entries occurs is set.

    By default, a switch reports traps at an interval of 60 seconds when a hash conflict of ND entries occurs.

  4. (Optional) Run nd trap hash-conflict history history-number

    The number of traps reported within each interval when a hash conflict of ND entries occurs is set.

    By default, a switch reports a maximum of 10 traps within each interval when a hash conflict of ND entries occurs.

Verifying the Configuration

Run the display current-configuration command to check whether the trap function for hash conflicts of ND entries is configured on the switch.

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Updated: 2019-04-20

Document ID: EDOC1100065678

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