H3C Technologies H3C SecPath F1000-E - Manual (Page 384)

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Configuring split horizon and poison reverse
NOTE:
If both split horizon and poison reverse are configured, only the poison reverse function takes effect.
The split horizon and poison reverse functions can avoid routing loops.
• Enable split horizon.
The split horizon function disables an interface from sending routes received from the interface to
prevent routing loops between adjacent routers.
To enable split horizon:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable split horizon. rip split-horizon
Optional.
Enabled by default.
NOTE:
Disabling the split horizon function on a point-to-point link does not take effect.
• Enable 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. This can avoid routing loops between
neighbors.
To enable poison reverse:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable poison reverse. rip poison-reverse Disabled by default.
Configuring the maximum number of ECMP routes
Perform this task to implement load sharing over ECMP routes.
To configure the maximum number of ECMP routes:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter RIP view.
rip [ process-id ] [ vpn-instance
vpn-instance-name ]
N/A