H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 230)

24-12
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… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable poison reverse rip poison-reverse
Required
Disabled by default
Enabling Zero Field Check on Incoming RIPv1 Messages
Some fields in the RIPv1 message must be zero. These fields are called zero fields. You can enable
zero field check on received RIPv1 messages. If such a field contains a non-zero value, the RIPv1
message will not be processed. If you are sure that all messages are trusty, you can disable zero field
check to save CPU resources.
Follow these steps to enable zero field check on incoming RIPv1 messages:
To do… Use the command… Remarks
Enter system view system-view ––
Enter RIP view rip [ process-id ] ––
Enable zero field check on received
RIPv1 messages
checkzero
Optional
Enabled by default
Enabling Source IP Address Check on Incoming RIP Updates
You can enable source IP address check on incoming RIP updates.
For a message received on an Ethernet interface, RIP compares the source IP address of the message
with the IP address of the interface. If they are not in the same network segment, RIP discards the
message.
For a message received on a serial interface, RIP checks whether the source address of the message
is the IP address of the peer interface. If not, RIP discards the message.
Follow these steps to enable source IP address check on incoming RIP updates: