HP 6125XLG Configuration Manual page 76

Figure 30 Relationship in view of geographical locations
As shown in Figure
admin-scoped zones must be geographically separated and isolated. A router cannot belong to
multiple admin-scoped zones. An admin-scoped zone contains routers that are different from other
admin-scoped zones. However, the global-scoped zone includes all routers in the PIM-SM domain.
Multicast packets that do not belong to any admin-scoped zones are forwarded in the entire
PIM-SM domain.
In view of multicast group address ranges:
•
Each admin-scoped zone provides services for specific multicast groups, of which the multicast
group addresses are valid only within the local zone. The multicast groups of different
admin-scoped zones might have intersections. The global-scoped zone provides services for all the
multicast groups other than those of the admin-scoped zones.
Figure 31 Relationship in view of multicast group address ranges
Admin-scope 1
G1 address
Global-scope
− −
G G1 G2 address
As shown in Figure
admin-scoped zone 3 is a subset of the admin-scoped zone 1. The global-scoped zone provides
services for all the multicast groups that are not covered by the admin-scoped zones 1 and 2,
G−G1−G2 in this case.
30, for the multicast groups in a specific group address range, the
Admin-scope 3
G3 address
31, the admin-scoped zones 1 and 2 have no intersection, but the
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Admin-scope 2
G2 address