Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide
Chapter 2 RIP Configuration Commands
3Com Corporation
2-1
Chapter 2 RIP Configuration Commands
 Note:
For the specific examples and parameter explanation of VPN instance, refer to “MPLS”
module of this manual.
2.1 RIP Configuration Commands
2.1.1 checkzero
Syntax
checkzero
undo checkzero
View
RIP view
Parameter
None
Description
Use the checkzero command to check the zero field of RIP-1 packet.
Use the undo checkzero command to cancel the check of the zero fields.
By default, RIP-1 performs the zero field check.
According to the protocol (RFC1058) specifications, some fields in RIP-1 packets must
be zero, called zero fields. With the checkzero command, the zero check operation for
RIP-1 packet can be enabled or disabled. During the zero check operation, if the RIP-1
packet in which the zero fields are not zeros is received, it will be rejected.
This command is ineffective to RIP-2 since RIP-2 packets have no zero fields.
Example
# Configure not to perform zero check for RIP-1 packet.
[3Com -rip] undo checkzero