H3C S5500-EI Series Operation Manual page 121

Operation Manual – Multicast
H3C S5500-EI Series Ethernet Switches
II. Relationship between BSR admin-scope regions and the global scope zone
A better understanding of the global scope zone and BSR admin-scope regions should
be based on two aspects: geographical space and group address range.
1) Geographical space
BSR admin-scope regions are logical regions specific to particular multicast groups,
and each BSR admin-scope region must be geographically independent of every other
one, as shown in
Figure 7-7 Relationship between BSR admin-scope regions and the global scope zone
in geographic space
BSR admin-scope regions are geographically separated from one another. Namely, a
router must not serve different BSR admin-scope regions. In other words, different BSR
admin-scope regions contain different routers, whereas the global scope zone covers
all routers in the PIM-SM domain.
2) In terms of multicast group address ranges
Each BSR admin-scope region serves specific multicast groups. Usually, these
addresses have no intersections; however, they may overlap one another.
Figure 7-7.
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Chapter 7 PIM Configuration