H3C Technologies H3C S7500E Series Switches - Manual (Page 163)

6-26
To do… Use the command… Remarks
Configure a legal BSR address
range
bsr-policy acl-number
Optional
No restrictions on BSR address
range by default
z Since a large amount of information needs to be exchanged between a BSR and the other
devices in the PIM-SM domain, a relatively large bandwidth should be provided between
the C-BSRs and the other devices in the PIM-SM domain.
z For C-BSRs interconnected via a Generic Routing Encapsulation (GRE) tunnel, multicast
static routes need to be configured to ensure that the next hop to a C-BSR is a GRE
interface. For more information about multicast static routes, refer to Multicast Routing and
Forwarding Configuration in the IP Multicast Configuration Guide.
Configuring a PIM domain border
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:
To do… Use the command… Remarks
Enter system view 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.
Configuring global C-BSR parameters
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.