3com 5500-ei pwr Installation Instruction

 

17 

Configure a limit on the 
number of PIM neighbors 
on the interface 

pim neighbor-limit limit 

Optional 

By default, the upper limit on the 
number of PIM neighbors on an 
interface is 128. 

Configure a filtering rule to 
filter PIM neighbors 

pim neighbor-policy 
acl-number 

Optional 

By default, no filtering rule is 
configured. 

 

If the number of existing PIM neighbors exceeds the user-defined limit, the existing PIM neighbors will 

not be deleted.  

 

Initially, some data is lost when multicast receivers receive multicast data from a multicast source. The 

reason is that (S, G) entries in the PIM routing table and multicast routing table age out if no data stream 

is received within a configurable period of time, known as multicast source lifetime or (S, G) aging time. 

These entries need to be reestablished before the corresponding multicast data can be forwarded by 

the multicast switch again. In the process of table entry reestablishment, some data may be lost.  

If the multicast source lifetime is appropriately lengthened when the data traffic has stopped, the 

multicast data, when arriving at the multicast switch again, can be forwarded by the switch without the 

need of reestablishing the table entries. This helps avoid data loss.  

Follow these steps to configure multicast source lifetime: 

Enter system view 

— 

Enter PIM view 

— 

Configure multicast source 
lifetime 

source-lifetime interval 

Optional 

210 seconds by default 

 

The configured multicast source lifetime applies to all (S, G) entries in the PIM routing table and the 

multicast routing table rather than to a specific (S, G) entry, and the configuration changes the aging 

time of all the existing (S, G) entries.