Chapter 2 Rip Configuration Commands; Rip Configuration Commands; Checkzero - Huawei Quidway S3900 series Command Manual

Command Manual – Routing Protocol
Quidway S3900 Series Ethernet Switches-Release 1510

Chapter 2 RIP Configuration Commands

Note:
When running a routing protocol, the Ethernet switch also functions as a router. The
word "router" and the router icons 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.
<Quidway> system-view
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Chapter 2 RIP Configuration Commands