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Configuration Guide - IP Unicast Routing

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP Unicast Routing, including IP Routing, Static Route, RIP, RIPng, OSPF, OSPFv3, IPv4 IS-IS, IPv6 IS-IS, BGP, Routing Policy, and PBR.
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Configuring RIP to Check the Validity of Update Packets

Configuring RIP to Check the Validity of Update Packets

Context

Checking RIP Update packet validity improves network security. Validity check includes zero field check for RIP-1 packets and source address check for RIP Update packets.

  • In a RIP-1 packet, the values of some fields must be zero. These fields are zero fields. After zero field check is enabled, the device checks the zero fields in the RIP-1 packets and discards the packets in which the zero field values are not 0.
  • This command verifies the source IP address of the received RIP packet. Specifically, the command checks whether the IP address of the interface that sends the packet is in the same network segment as the IP address of the interface that receives the packet. If the addresses are not in the same network segment, the RIP packet will not be processed.

Procedure

  • Configure the zero field check for RIPv1 packets.
    1. Run system-view

      The system view is displayed.

    2. Run rip [ process-id ]

      The RIP view is displayed.

    3. Run checkzero

      The zero field check is configured for RIP-1 packets.

      Configuring the zero field check is invalid in RIP-2.

    4. Run commit

      The configuration is committed.

  • Configure the source address check for RIP Update packets.
    1. Run system-view

      The system view is displayed.

    2. Run rip [ process-id ]

      The RIP view is displayed.

    3. Run verify-source

      The source IP address check is configured for RIP Update packets.

    4. Run commit

      The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100074760

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