Configuring Split Horizon And Poison Reverse - 3Com S7906E Configuration Manual

Based on network performance, you need to make RIP timers of RIP routers identical to each other to
avoid unnecessary traffic or route oscillation.

Configuring Split Horizon and Poison Reverse

If both split horizon and poison reverse are configured, only the poison reverse function takes effect.
The split horizon and poison reverse functions can avoid routing loops.
Enabling split horizon
The split horizon function disables an interface from sending routes received from the interface to
prevent routing loops between adjacent routers.
Follow these steps to enable split horizon:
To do...
Enter system view
Enter interface view
Enable split horizon
Disabling the split horizon function on a point-to-point link does not take effect.
Enabling poison reverse
The poison reverse function allows an interface to advertise the routes received from it, but the metric of
these routes is set to 16, making them unreachable.
Follow these steps to enable poison reverse:
To do...
Enter system view
Enter interface view
Use the command...
system-view
interface interface-type
interface-number
rip split-horizon
Use the command...
system-view
interface interface-type
interface-number
1-13
Remarks
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Optional
Enabled by default
Remarks
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