Accton Technology ES4626 - Manual (Page 637)

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Routing Protocol, assure that each device can communicate with each other in the
network layer, and be able to implement dynamic routing update in virtue of Unicast
Routing Protocol.
16.3.5 PIM-SM Troubleshooting
In configuring and using PIM-SM Protocol, PIM-SM Protocol might not operate normally
caused by physical connection or incorrect configuration. Therefore, the user should pay
attention to the following issues:
z Assure that physical connection is correct;
z Assure the Protocol of Interface and Link is UP (use show interface
command);
z Assure that PIM Protocol is enabled in Global Mode (use ip pim
multicast-routing)
z Assure that PIM-SM is configured on the interface (use ip pim
sparse-mode);
z Multicast Protocol requires RPF Check using unicast routing; therefore the
correctness of unicast routing must be assured beforehand.
z 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.
z 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 to Technology Service Center.
16.3.5.1 Commands for Monitor And Debug
16.3.5.1.1 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: