R3303-HP HSR6800 Routers IP Multicast Configuration Guide

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Because the BSR and the other devices exchange a large amount of information in the PIM-SM domain,
provide a relatively large bandwidth between the C-BSRs and the other devices.
For C-BSRs interconnected through a GRE tunnel, configure static multicast routes to make sure the next
hop to a C-BSR is a tunnel interface. For more information about static multicast routes, see "Configuring
multicast routing and forwarding."
To configure a C-BSR:
Ste
p
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 an interface as a
C-BSR.
c-bsr interface-type
interface-number [ hash-length
[ priority ] ]
No C-BSRs are configured by
default.
4. Configure a legal BSR
address range.
bsr-policy acl-number
Optional.
No restrictions on BSR address
range by default.
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
p
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.
The following rules apply to the hash mask length and C-BSR priority:
• You configure the hash mask length and C-BSR priority globally, in an admin-scoped zone, and in
the global scope zone.
• The values configured in the global scope zone or admin-scoped zone have preference over the
global values.