H3C S9500E Series, Configuration Manual

Page: 332 / 459

332
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.
To do… Use the command… Remarks
Step 1
Enter system view system-view ––
Step 2
Enter interface view
interface interface-type interface-
number
––
Step 3
Enable the split horizon
function
ripng split-horizon
Optional
Enabled 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 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, which means the route is unreachable.
To do… Use the command… Remarks
Step 1
Enter system view system-view ––
Step 2
Enter interface view
interface interface-type interface-
number
––
Step 3
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
is discarded. If you are sure that all packets are trustworthy, disable the zero field check to
reduce the CPU processing time.
To do… Use the command… Remarks
Step 1
Enter system view system-view ––
Step 2
Enter RIPng view ripng [ process-id ] ––