3Com 7750 Series Chapter 2 RIP Configuration Commands

3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 2 RIP Configuration Commands
2-1
Chapter 2 RIP Configuration Commands
 Note:
The word “router” covered in the following text represent routers in common sense
and Ethernet switches running a routing protocol. To improve readability, this will not
be mentioned again in 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 enable zero field check of RIP-1 packets.
Use the undo checkzero command to disable zero field check.
By default, RIP-1 performs zero field check.
According to the protocol (RFC 1058) specifications, some fields in RIP-1 packets
must be zero and these fields are called zero fields. You can use the checkzero
command to enable/disable zero field check of RIP-1 packets. When zero field check
is enabled, if an incoming RIP-1 packet has a non-zero zero field, the packet will be
rejected.
This command does not apply to RIP-2 packets because they have no zero fields.
Example
# Disable zero field check on RIP-1 packets.
<3Com> system-view