Configuring Split Horizon And Poison Reverse; Configuring Zero Field Check On Ripng Packets - HP VSR1000 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 neighbors.
HP recommends enabling 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
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 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:
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
357
Remarks
By default:
•
The update timer is 30 seconds.
•
The timeout timer is 180 seconds.
•
The suppress timer is 120 seconds.
•
The garbage-collect timer is 120 seconds.
Remarks
N/A
N/A
By default, split horizon is enabled.
Remarks
N/A
N/A
By default, poison reverse is
disabled.