3Com 7757 Configuration Manual page 297

Configuration Tasks
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Configuring RIP timers
Table 224 Configure RIP timers
Operation
Enter system view
Enter RIP view
Set the values of RIP timers
When configuring the values of RIP timers, you should take network performance
into consideration and perform consistent configuration on all routers running RIP
to avoid unnecessary network traffic and network route oscillation.
Configuring split horizon
Table 225 Configure split horizon
Operation
Enter system view
Enter interface view
Enable split horizon
Split horizon cannot be disabled on a point-to-point link.
Configuring RIP-1 packet zero field check
Table 226 Configure RIP-1 packet zero field check
Operation
Enter system view
Enter RIP view
Enable zero field check of RIP-1
packets
Some fields in a RIP-1 packet must be 0, and they are known as zero fields. For
RIP-1, zero field check is performed on incoming packets, those RIP-1 packets with
nonzero value in a zero filed will not be processed further. As a RIP-2 packet has
no zero fields, this configuration is invalid for RIP-2.
Setting RIP-2 packet authentication mode
RIP-2 supports two authentication modes, simple authentication and MD5
authentication.
RIP Network Adjustment and Optimization
Command
system-view
rip
timers { update update-timer |
timeout timeout-timer } *
Command
system-view
interface interface-type
interface-number
rip split-horizon
Command
system-view
rip
checkzero
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Description
-
-
Optional
By default, Update timer
value is 30 seconds and
Timeout timer value is 180
seconds.
Description
-
-
Optional
By default, an interface uses
split horizon to send RIP
packets.
Description
-
-
Optional
By default, zero field check
is performed on RIP-1
packets.