Configuring Split Horizon And Poison Reverse; Configuring Zero Field Check On Ripng Packets - HP FlexFabric 12900E Series Configuration Manual

Step
3. Set 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 neighbors.
As a best practice, enable split horizon to prevent routing loops in normal cases.
To configure split horizon:
Step
1. Enter system view.
2. Enter interface view.
3. Enable split horizon.
Configuring poison reverse
Poison reverse 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 configure poison reverse:
Step
1. Enter system view.
2. Enter interface view.
3. Enable poison reverse.

Configuring zero field check on RIPng packets

Some fields in the RIPng packet header must be zero. These fields are called zero fields. You can
enable zero field check on incoming RIPng packets. If a zero field of a packet contains a non-zero
value, RIPng does not process the packets. If you are certain that all packets are trustworthy, disable
the zero field check to save CPU resources.
To configure RIPng zero field check:
Step
1. Enter system view.
Command
timers { garbage-collect
garbage-collect-value
suppress suppress-value
timeout timeout-value | update
update-value } *
Command
system-view
interface
interface-number
ripng split-horizon
Command
system-view
interface
interface-number
ripng poison-reverse
Command
system-view
383
Remarks
By default:
•
The update timer is 30 seconds.
|
•
The timeout timer is 180 seconds.
|
•
The suppress timer is 120 seconds.
•
The garbage-collect
seconds.
Remarks
N/A
interface-type
N/A
By default,
enabled.
Remarks
N/A
interface-type
N/A
By default, poison reverse is
disabled.
Remarks
N/A
timer is 120
split horizon is