3Com 4500 26-PORT, 4500 PWR 50-PORT, 4500 PWR 26-PORT manual Checkzero Syntax, Default cost Syntax

RIP Configuration Commands 149

	Example
	To configure the next hop of the default route as 129.102.0.2, enter the
	following:
	<4500>system-view
	System View: return to User View with Ctrl+Z.
	[4500]ip route-static 0.0.0.0 0.0.0.0 129.102.0.2
RIP Configuration	This section describes the commands you can use to configure the Routing
Commands	Information Protocol (RIP).
	When the Switch 4500 runs a routing protocol, it is able to perform the functions
	of a router. The term router in this section can refer either to a physical router or to
	the Switch 4500 running a routing protocol.
checkzero	Syntax
	checkzero
	undo checkzero
	View
	RIP view
	Parameter
	None
	Description
	Use the checkzero command to check the zero field of RIP-1 packets. By default,
	RIP-1 performs zero field checking.
	Use the undo checkzero command to disable the checking of the zero fields.
	According to the RFC1058 protocol specifications, some fields in RIP-1 packets
	must be set to zero. These are called zero fields. During the zero check operation,
	if a RIP-1 packet is received in which the zero fields are not zeros, it will be
	rejected. Use the checkzero command to enable or disable the zero check
	operation on RIP-1.
	This command does not work with RIP-2 packets, since RIP-2 packets have no zero
	fields.
	Example
	To configure the Switch not to perform zero checking for RIP-1 packet, enter the
	following:
	<4500>system-view
	System View: return to User View with Ctrl+Z.
	[4500]rip
	[4500-rip]undo checkzero
default cost	Syntax

default cost value