Инструкции По Установке для 3com S7906E

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Follow these steps to configure the prune delay time 

To do... 

Use the command... 

Remarks 

Enter system view 

— 

Enter public instance PIM view 
or VPN instance PIM view 

pim [ vpn-instance 
vpn-instance-name ] 

— 

Configure the prune delay 
interval 

prune delay interval 

Optional 

3 seconds by default 

 

PIM routers discover PIM neighbors and maintain PIM neighboring relationships with other routers by 

periodically sending out hello messages.  

Upon receiving a hello message, a PIM router waits a random period, which is smaller than the 

maximum delay between hello messages, before sending out a hello message. This avoids collisions 

that occur when multiple PIM routers send hello messages simultaneously.  

A PIM router periodically sends join/prune messages to its upstream for state update. A join/prune 

message contains the join/prune timeout time. The upstream router sets a join/prune timeout timer for 

each pruned downstream interface.  

Any router that has lost assert election will prune its downstream interface and maintain the assert state 

for a period of time. When the assert state times out, the assert losers will resume multicast forwarding.  

When a router fails to receive subsequent multicast data from multicast source S, the router does not 

immediately delete the corresponding (S, G) entry; instead, it maintains the (S, G) entry for a period of 

time, namely the multicast source lifetime, before deleting the (S, G) entry.  

Follow these steps to configure PIM common timers globally:  

To do... 

Use the command... 

Remarks 

Enter system view 

— 

Enter public instance PIM view 
or VPN instance PIM view 

pim [ vpn-instance 
vpn-instance-name ] 

— 

Configure the hello interval  

timer hello interval 

Optional 

30 seconds by default  

Configure the join/prune 
interval  

timer join-prune interval 

Optional 

60 seconds by default  

Configure the join/prune 
timeout time  

holdtime join-prune interval 

Optional 

210 seconds by default  

Configure assert timeout time  

holdtime assert interval 

Optional 

180 seconds by default  

Configure the multicast source 
lifetime  

source-lifetime interval 

Optional 

210 seconds by default