3com S7906E 설치 설명서

1-27 

Enter system view 

— 

Enter interface view 

interface interface-type 
interface-number 

— 

Configure a multicast 
forwarding boundary 

multicast boundary 
group-address { mask | 
mask-length } 

Required 

By default, no multicast 
forwarding boundary is 
configured.  

 

The  group-address { mask | mask-length } parameter of the multicast boundary command can be 

used to specify the multicast groups an admin-scope zone serves, in the range of 239.0.0.0/8. For 

details about the multicast boundary command, see Multicast Routing and Forwarding Commands in 

the IP Multicast Volume.  

 

In a network with administrative scoping enabled, group-range-specific BSRs are elected from C-BSRs. 

C-RPs in the network send advertisement messages to the specific BSR. The BSR summarizes the 

advertisement messages to form an RP-set and advertises it to all routers in the specific admin-scope 

zone. All the routers use the same Hash algorithm to get the RP address corresponding to the specific 

multicast group.  

Configure C-BSRs for each admin-scope zone and the global-scope zone. 

1)  Configure C-BSRs for each admin-scope zone 

Perform the following configuration on the routers that will work as C-BSRs in admin-scope zones.  

Follow these steps to configure a C-BSR for an admin-scope zone: 

Enter system view 

— 

Enter public instance or VPN 
instance PIM view 

pim [ vpn-instance 
vpn-instance-name ] 

— 

Configure a C-BSR for an 
admin-scope zone  

c-bsr group group-address 
{ mask | mask-length } 
[ hash-length hash-length | 
priority priority ] * 

Required 

No C-BSRs are configured for 
an admin-scope zone by 
default.