Microsoft ES4612 4-255, ip split-horizon, ip rip authentication key

IP Routing Commands
4-255
4
ip split-horizon
This command enables split-horizon or poison-reverse (a variation) on an interface.
Use the no form to disable split-horizon.
Syntax
ip split-horizon [poison-reverse]
no ip split-horizon
poison-reverse - Enables poison-reverse on the current interface.
Command Mode
Interface Configuration (VLAN)
Default Setting
split-horizon
Command Usage
• Split horizon never propagates routes back to an interface from which they
have been acquired.
• Poison reverse propagates routes back to an interface port from which they
have been acquired, but sets the distance-vector metrics to infinity. (This
provides faster convergence.)
Example
This example propagates routes back to the source using poison-reverse.
ip rip authentication key
This command enables authentication for RIPv2 packets and to specify the k ey that
must be used on an interface. Use the no form to prevent authentication.
Syntax
ip rip authentication key key-string
no ip rip authentication
key-string - A password used for authentication.
(Range: 1-16 characters, case sensitive)
Command Mode
Interface Configuration (VLAN)
Default Setting
No authentication
Command Usage
• This command can be used to restrict the interfaces that can e xchange RIPv2
routing information. (Note that this command does not apply to RIPv1.)
Console(config)#interface vlan 1
Console(config-if)#ip split-horizon poison-reverse
Console(config-if)#