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specific multicast group range. The global scope zone also maintains a BSR, which serves the
remaining multicast groups.
Enabling administrative scoping
Before you configure an admin-scope zone, you must enable administrative scoping.
Perform the following configuration on all routers in the PIM-SM domain.
To enable administrative scoping:
Step 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.
Enable administrative
scoping.
c-bsr admin-scope
Disabled by default.
Configuring an admin-scope zone boundary
ZBRs form the boundary of each admin-scope zone. Each admin-scope zone maintains a BSR,
which serves a specific multicast group range. Multicast protocol packets (such as assert messages
and bootstrap messages) that belong to this range cannot cross the admin-scope zone boundary.
Perform the following configuration on routers that you want to configure as a ZBR.
To configure an admin-scope zone boundary:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Configure a multicast
forwarding boundary.
multicast boundary
group-address
{
mask
|
mask-length
}
By default, no multicast
forwarding boundary is
configured.
The
group-address
{
mask
|
mask-length
} argument can
specify the multicast groups that
an admin-scope zone serves, in
the range of 239.0.0.0/8.
Configuring C-BSRs for each admin-scope zone and the global-scope zone
In a network with administrative scoping enabled, group-range-specific BSRs are elected from
C-BSRs. C-RPs in the network send advertisement messages to the specific BSR. The BSR
summarizes the advertisement messages to form an RP-set and advertises it to all routers in the
specific admin-scope zone. All routers use the same hash algorithm to get the RP address
corresponding to the specific multicast group.
Configure C-BSRs for each admin-scope zone and the global-scope zone.
•
Configure C-BSRs for each admin-scope zone:
Perform the following configuration on the routers that you want to configure as C-BSRs in
admin-scope zones.
To configure a C-BSR for an admin-scope zone:
