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caused by physical connection or incorrect configuration. Therefore, the user should pay
attention to the following issues:
Assure that physical connection is correct;
Assure the Protocol of Interface and Link is UP (use show interface command);
Assure that PIM Protocol is enabled in Global Mode (use ip pim multicast-routing)
Assure that PIM-SM is configured on the interface (use ip pim sparse-mode);
Multicast Protocol requires RPF Check using unicast routing; therefore the
correctness of unicast routing must be assured beforehand.
PIM-SM Protocol requires supports by rp and bsr, therefore you should use
show ip
pim bsr-router
first to see if there is bsr information. If not, you need to check if
there is unicast routing leading to bsr.
Use
show ip pim rp-hash
command to check if rp information is correct; if there is
not rp information, you still need to check unicast routing;
If all attempts including Check are made but the problems on PIM-SM can’t be
solved yet, then use debug commands such debug pim/debug pim bsr please, and then
copy DEBUG information in 3 minutes and send toTechnology Service Center.
17.3.5.1 Monitor And Debug Command
17.3.5.1.1 debug pim event
Command: debug pim event
no debug pim event
Function:
Enable or Disable pim event debug switch
Parameter:
None
Default:
Disabled
Command Mode:
Enable or Disable pim event debug switch
Usage Guide:
Enable pim event debug switch and display events information about pim
operation.
Example:
Switch# debug ip pim event
17.3.5.1.2 debug pim mfc
Command: debug pim mfc
no debug pim mfc
Function:
Enable or Disable pim mfc debug switch
Parameter:
None
Default:
Disabled
Command Mode:
Admin Mode and Global Mode
Usage Guide:
Enable pim mfc debug switch and display generated and transmitted
multicast id’s information.
