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CLI-based Configuration Guide - IP Unicast Routing

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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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.
  • The device checks whether the IP addresses of interfaces that send and receive Update packets are on the same network segment. If not, the switch does not process the packets.

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.

  • 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.

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Updated: 2019-05-17

Document ID: EDOC1000174069

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