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Chapter 6 CLI – Layer 3
P332G-ML User’s Guide 161
ip rip poison-reverse Command
Use the ip rip poison-reverse command to enable split-horizon with
poison-reverse on an interface. The no form of this command disables the poison-
reverse mechanism.
The split-horizon technique prevents information about routes from exiting the
router interface through which the information was received. This prevents routing
loops.
Poison reverse updates explicitly indicate that a network or subnet is unreachable
rather than implying they are not reachable. Poison reverse updates are sent to
defeat large routing loops.
The syntax for this command is:
[no] ip rip poison-reverse
ip rip split-horizon Command
Use the ip rip split-horizon command to enable split-horizon mechanism.
The no form of this command disables the split-horizon. By default split-horizon is
enabled.
The split-horizon technique prevents information about routes from exiting the
router interface through which the information was received. This prevents routing
loops.
The syntax for this command is:
[no] ip rip split-horizon
Example:
Router-N(config-if:marketing)# no ip rip split-horizon
ip rip authentication mode Command
Use the ip rip authentication mode command to specify the type of
authentication used in RIP Version 2 packets. The no form of this command restores
the default value of none.
The syntax for this command is: [no] ip rip authentication mode
[simple|none]
simple|none The authentication type used in RIP Version 2 packets:
• simple - clear text authentication.
• none - no authentication.