Configuring Split Horizon And Poison Reverse; Configuring Zero Field Check On Ripng Packets - HP 830 Series Configuration Manual

Step
3. Configure RIPng
timers.

Configuring split horizon and poison reverse

If both split horizon and poison reverse are configured, only the poison reverse function takes effect.
Configuring split horizon
Split horizon disables RIPng from sending routes through the interface where the routes were learned to
prevent routing loops between adjacent routers.
HP recommends enabling split horizon to prevent routing loops.
To configure split horizon:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the split horizon
function.
Configuring the poison reverse function
Poison reverse allows RIPng to send routes through the interface where the routes were learned. The
metric of these routes is always set to 16 (unreachable) to prevent routing loops between neighbors.
To configure poison reverse:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the poison reverse
function.

Configuring zero field check on RIPng packets

Some fields in the RIPng packet must be zero, which are called "zero fields." When zero field check on
RIPng packets is enabled, the entire RIPng packet is discarded if such a field contains a non-zero value.
Command
timers { garbage-collect
garbage-collect-value | suppress
suppress-value | timeout
timeout-value | update
update-value } *
Command
system-view
interface interface-type
interface-number
ripng split-horizon
Command
system-view
interface interface-type
interface-number
ripng poison-reverse
156
Remarks
Optional.
The RIPng timers have the following
defaults:
•
Update timer—30 seconds.
•
Timeout timer—180 seconds.
•
Suppress timer—20 seconds.
•
Garbage-collect timer—20 seconds.
HP recommends that you not change the
default values of these timers.
Remarks
N/A
N/A
Optional.
Enabled by default.
Remarks
N/A
N/A
Disabled by default.