382
Figure 101 Relationship in view of geographical locations
As shown in Figure 101, for the IPv6 multicast groups with the same scope field value, the IPv6
admin-scope zones must be geographically separated and isolated. The IPv6 global-scoped zone
includes all routers in the IPv6 PIM-SM domain or IPv6 BIDIR-PIM domain. IPv6 multicast packets
that do not belong to any IPv6 admin-scope zones are forwarded in the entire IPv6 PIM-SM domain
or IPv6 BIDIR-PIM domain.
• In view of the scope field values
In terms of the scope field values, the scope field in an IPv6 multicast group address shows which
zone the IPv6 multicast group belongs to.
Figure 102 IPv6 multicast address format
An IPv6 admin-scoped zone with a larger scope field value contains an IPv6 admin-scoped zone
with a smaller scope field value. The zone with the scope field value of E is the IPv6 global-scoped
zone. Table 2 lists the po
ssible values of the scope field.
Table 2 Values of the Scope field
Value Meanin
Remarks
0, F Reserved N/A
1 Interface-local scope N/A
2 Link-local scope N/A
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