Configuring Split Horizon And Poison Reverse; Configuring Zero Field Check On Ripng Packets - HP 4800G Series Configuration Manual

Configuring Split Horizon and Poison Reverse

If both split horizon and poison reverse are configured, only the poison reverse function takes effect.
Configure split horizon
The split horizon function disables a route learned from an interface from being advertised through the
same interface to prevent routing loops between neighbors.
Follow these steps to configure split horizon:
To do...
Enter system view
Enter interface view
Enable the split horizon
function
Generally, you are recommended to enable split horizon to prevent routing loops.
Configuring the poison reverse function
The poison reverse function enables a route learned from an interface to be advertised through the
interface. However, the metric of the route is set to 16. That is to say, the route is unreachable.
Follow these steps to configure poison reverse:
To do...
Enter system view
Enter interface view
Enable the poison reverse
function

Configuring Zero Field Check on RIPng Packets

Some fields in the RIPng packet must be zero. These fields are called zero fields. With zero field check
on RIPng packets enabled, if such a field contains a non-zero value, the entire RIPng packet will be
discarded. If you are sure that all packets are trusty, you can disable the zero field check to reduce the
CPU processing time.
Use the command...
system-view
interface interface-type interface-number
ripng split-horizon
Use the command...
system-view
interface interface-type interface-number
ripng poison-reverse
1-8
Remarks
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Optional
Enabled by default
Remarks
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Required
Disabled by default