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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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Enabling the Switch to Perform Layer 2 Forwarding for IP Traffic During a Ring Network Switchover

Enabling the Switch to Perform Layer 2 Forwarding for IP Traffic During a Ring Network Switchover

Context

As shown in Figure 8-2, when the switch deployed with the ring network protocols (STP, RSTP, MSTP, SEP, ERPS, RRPP, VBST, and Smart Link) performs a link switchover due to a link fault, the switch needs to learn ARP entries again. This deteriorates Layer 3 convergence performance of IP traffic. If the switch is enabled to perform Layer 2 forwarding for IP traffic during the switchover, the convergence performance can be improved. By default, the switch is enabled to perform Layer 2 forwarding for IP traffic during a ring network switchover.

Figure 8-2  Connecting to the gateway using ring network protocols
NOTE:

Only the X series cards support this function.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run undo ip forwarding converge

    The switch is enabled to perform Layer 2 forwarding for IP traffic during a ring network switchover.

    By default, the switch is enabled to perform Layer 2 forwarding for IP traffic during a ring network switchover.

    After the switch is enabled to perform Layer 2 forwarding for IP traffic, it will forward the IP traffic in broadcast mode when the links are switched. Therefore, the IP traffic increases within a short time.

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Updated: 2019-04-20

Document ID: EDOC1100065743

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