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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 you want to configure as a PIM domain border.
To configure a PIM domain border:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Configure a PIM domain
border.
pim bsr-boundary
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 that corresponds to specific multicast groups.
You can configure the hash mask length and C-BSR priority globally, in an admin-scope zone, and in the
global scope zone.
• The values configured in the global scope zone or admin-scope zone have preference over the
global values.
• If you do not configure these parameters in the global scope zone or admin-scope zone, the
corresponding global values will be used.
For configuration of C-BSR parameters for an admin-scope zone and global scope zone, see
"Configuring C-BSRs for each admin-scope zone and the global-scope zone."
P
erform the following configuration on C-BSR routers.
To configure C-BSR parameters:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enter public network PIM view
or VPN instance PIM view.
pim [ vpn-instance
vpn-instance-name ]
N/A
3. Configure the hash mask
length.
c-bsr hash-length hash-length
Optional.
30 by default.
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