3com S7906E Instruccion De Instalación

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As the administrative core of a PIM-SM domain, the BSR sends the collected RP-Set information in the 

form of bootstrap messages to all routers in the PIM-SM domain.  

A PIM domain border is a bootstrap message boundary. Each BSR has its specific service scope. A 

number of PIM domain border interfaces partition a network into different PIM-SM domains. Bootstrap 

messages cannot cross a domain border in either direction  

Perform the following configuration on routers that can become a PIM domain border.  

Follow these steps to configure a PIM domain border: 

Enter system view 

— 

Enter interface view 

interface interface-type 
interface-number 

— 

Configure a PIM domain border  pim bsr-boundary 

Required 

By default, no PIM domain 
border is configured. 

 

In each PIM-SM domain, a unique BSR is elected from C-BSRs. The C-RPs in the PIM-SM domain 

send advertisement messages to the BSR. The BSR summarizes the advertisement messages to form 

an RP-set and advertises it to all routers in the PIM-SM domain. All the routers use the same Hash 

algorithm to get the RP address corresponding to specific multicast groups.  

Perform the following configuration on C-BSR routers.  

Follow these steps to configure C-BSR parameters: 

Enter system view 

— 

Enter public instance or VPN 
instance PIM view 

pim [ vpn-instance 
vpn-instance-name ] 

— 

Configure the Hash mask 
length 

c-bsr hash-length hash-length

Optional 

30 by default 

Configure the C-BSR priority 

c-bsr priority priority 

Optional 

By default, the C-BSR priority is 
0.