3Com S7906E - Switch, Configuration Manual

Page: 1046 / 2621

1-24
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.
Follow these steps to configure C-BSR parameters:
To do… Use the command… Remarks
Enter system view 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.