sources-per-group <limit>

no sources-per-group <limit>


Configures the total number of sources allowed for a group on the router. By default, there is no limit on the number of sources for a group. When the number of sources for a group exceeds the configured limit, multicast traffic from additional sources will be dropped.

The no form of this command removes the currently configured limit value.

Command context




Specifies the value to be configured as the sources allowed per group. Range: 1 to 4294967295.


Administrators or local user group members with execution rights for this command.


Flows exceeding the limit will be programmed as a bridge entry and will not have the outgoing interfaces list populated. This configuration does not allow new sources for the group. At the time of configuration, if the device has more sources for the given group than the configured value, already allowed sources continue to exist until they are removed.

The flows are programmed in the HW on a FCFS basis. There could be scenarios where the flow is forwarded in neighbor router, but it may not be forwarded on the current router because of exceeding the limits configured on the current router. In such cases, it is recommended to configure higher limits to avoid traffic outage.


Configuring and removing the sources allowed per group:

switch(config)# router pim
switch(config-pim)# sources-per-group 4
switch(config-pim)# no sources-per-group