UMN:CLI User Manual
V5808
480
To disable the MLD snooping debugging, use the following command.
no debug mld snooping {all |
decode | encode | fsm | tib |
events}
Disables MLD snooping debugging.
To display the debugging information, use the following command.
show debugging mld snooping
Shows the debugging status of MLD.
10.2.6 MLD-Proxy IF Flap Discredit
MLD IF is MLD Proxy-enabled upstream or downstream interface that is used for MLD
proxy implementation.
MLD IF flap discredit function is intended to apply a traffic flow penalty in MLD interface
due to its link down-up (Flap). All of MLD IFs have 100 credit values by default.
A MLD IF loses the specified credit value in case the flapping happens on this interface.
Therefore, the forwarding path for the flow must be recalculated, causing low multicast
forwarding performance.
Under the ECMP environment, if MLD Proxy multi-uplink interface is load-balancing mode,
a multicast traffic flow is split across the multipath according to the priority based on its
credit unit value and configurations. The upstream interfaces with the largest credit would
get the highest proxy-service priority.
If MLD Proxy multi-uplink interface is specified the priority mode, one upstream interface
of the highest priority based on its credit value, priority and vid handles a multicast traffic
flow.
MLD IF flap discredit function has been designed to minimize such a path recalculation
caused by the IF flapping, which can increase the stability and quality for multicast
service. Using this function, the V5808 gives a discredit to a MLD IF for every flapping
time, and then the IF is not selected as a forwarding path until its credit is regenerated.
MLD Proxy IF flap discredit function is implemented with the following restrictions, so you
must keep them in mind before setting the related commands or parameters.
• If you configure recover-interval value as 0, the decreased MLD IF credit is not re-
covered.
• If the credit unit becomes 0 because of the continuous flapping of MLD IF, the
credit is not recovered until clear ipv6 mld if flap discredit command is configured.
To enable/disable the MLD IF flap discredit function, use the following command.
ipv6 mld if flap discredit
Enables the MLD IF flap discredit. (default)
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