332Configure split horizonThe split horizon function disables a route learned from an interface from being advertisedthrough the same interface to prevent routing loops between neighbors.To do… Use the command… RemarksStep 1 Enter system view system-view ––Step 2 Enter interface view interface interface-type interface-number ––Step 3 Enable the split horizonfunction ripng split-horizon OptionalEnabled by default• Generally, H3C recommends enabling split horizon to prevent routing loops.• In NBMA networks, split horizon may need to be disabled to ensure route advertisement.Configuring the poison reverse functionThe poison reverse function enables a route learned from an interface to be advertised throughthe interface. However, the metric of the route is set to 16, which means the route is unreachable.To do… Use the command… RemarksStep 1 Enter system view system-view ––Step 2 Enter interface view interface interface-type interface-number ––Step 3 Enable the poisonreverse function ripng poison-reverse RequiredDisabled by defaultConfiguring zero field check on RIPng packetsSome fields in the RIPng packet must be zero. These fields are called zero fields. With zero fieldcheck on RIPng packets enabled, if such a field contains a non-zero value, the entire RIPng packetis discarded. If you are sure that all packets are trustworthy, disable the zero field check toreduce the CPU processing time.To do… Use the command… RemarksStep 1 Enter system view system-view ––Step 2 Enter RIPng view ripng [ process-id ] ––
