UMN:CLI
User Manual
V8102
526
no ip pim message-interval
Deletes a specified interval to send join/prune messag-
es.
10.3.2.7
PIM VIF Flap Discredit
PIM VIF is a PIM-specific virtual interface that is used to send or receive PIM control
packets in the implementation level. It includes the methods for processing and compos-
ing PIM control messages, as well as various states per interface.
PIM routers are internally connected with PIM VIFs, and the equal cost multipath (ECMP)
can also exist between them. Under the ECMP environment, a traffic flow is split across
the multipath based on its source and group address as the physical interface
’s case.
However, if a VIF flapping happens, the forwarding path for the flow must be recalculated,
causing low multicast forwarding performance.
PIM VIF flap discredit function has been designed to minimize such a path recalculation
caused by the VIF flapping, which can increase the stability and quality for multicast ser-
vice. Using this function, the V8102 gives a discredit to a VIF for every flapping time, and
then the VIF is not selected as a forwarding path until its credit is regenerated.
To enable/disable the PIM VIF flap discredit function, use the following command.
Command
Mode
Description
ip pim vif flap discredit
Global
Enables the PIM VIF flap discredit. (default)
no ip pim vif flap discredit
Disables the PIM VIF flap discredit.
To set the discredit value for the VIF flapping, use the following command.
Command
Mode
Description
ip pim vif flap discredit unit
<10-
50>
Global
Sets the discredit value for the VIF flapping.
(default: 10)
no ip pim vif flap discredit unit
Deletes a configured discredit value.
To set the VIF credit regenerating rate, use the following command.
Command
Mode
Description
ip pim vif flap discredit half-
recover-time
<0-3600>
Global
Sets the VIF credit regenerating rate.
(default: 10 seconds)
no ip pim vif flap discredit half-
recover-time
Deletes a configured VIF credit regenerating rate.
If you configure this rate as 0, the VIF credit is not regenerated!
To set the current credit as the default (100), use the following command.
Command
Mode
Description
clear ip pim vif flap discredit
[
vif
<0-127>]
Enable
Global
Sets the current credit as the default (100).
0-127: VIF index
!
