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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.
Run system-view
The system view is displayed.
Run rip [ process-id ]
The RIP view is displayed.
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.
Run system-view
The system view is displayed.
Run rip [ process-id ]
The RIP view is displayed.
Run verify-source
The source IP address check is configured for RIP Update
packets.