3Com 4510G - Configuring Zero Field Check on Ripng Packets

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same interface to prevent routing loops between neighbors.
Follow these steps to configure split horizon:
To do… Use the command… Remarks
Enter system view system-view ––
Enter interface view interface interface-type interface-number ––
Enable the split horizon
function
ripng split-horizon
Optional
Enabled by default
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… Use the command… Remarks
Enter system view system-view ––
Enter interface view interface interface-type interface-number ––
Enable the poison reverse
function
ripng poison-reverse
Required
Disabled by default
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.
Follow these steps to configure RIPng zero field check:
To do… Use the command… Remarks
Enter system view system-view ––
Enter RIPng view ripng [ process-id ] ––
Enable the zero field check checkzero
Optional
Enabled by default