646 CHAPTER 47: PIM CONFIGURATION
Follow these steps to complete basic C-BSR configuration:
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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-BSR and the other devices in the PIM-SM domain.
Configuring a global-scope C-BSR
Follow these steps to configure a global-scope C-BSR:
Configuring an admin-scope C-BSR
By default, a PIM-SM domain has only one BSR. The entire network should be
managed by this BSR. To manage your network more effectively and specifically,
you can divide a PIM-SM domain into multiple BSR admin-scope regions, with
each BSR admin-scope region having one BSR, which serves specific multicast
groups.
Specific to particular multicast groups, the BSR administrative scoping mechanism
effectively lessens the management workload of a single-BSR domain and provides
group-specific services.
In a network divided into BSR admin-scope regions, BSRs are elected from
multitudinous C-BSRs to serve different multicast groups. The C-RPs in a BSR
admin-scope region send C-RP-Adv messages to only the corresponding BSR. The
BSR summarizes the advertisement messages into an RP-set and advertises it to all
the routers in the BSR admin-scope region. All the routers use the same algorithm
to get the RP addresses corresponding to specific multicast groups.
Follow these steps to configure an admin-scope C-BSR:
To do… Use the command… Remarks
Enter system view system-view -
Enter PIM view pim -
Configure an interface as a
C-BSR
c-bsr interface-type
interface-number
[ hash-length [ priority ]]
Required
No C-BSR is configured by
default
Configure a legal BSR address
range
bsr-policy acl-number Optional
No restrictions on BSR address
range by default
To do… Use the command… Remarks
Enter system view system-view -
Enter PIM view pim -
Configure a global-scope
C-BSR
c-bsr global [ hash-length
hash-length | priority
priority ] *
Required
No global-scope C-BSRs by
default
To do… Use the command… Remarks
Enter system view system-view -
Enter PIM view pim -
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