Uplinks In A Hierarchical Structure - 3Com CoreBuilder 7000 Operation Manual

Uplinks in a
Hierarchical Structure
Parent
Children
the hierarchy). Table 21 shows the updated topology database that node
A.1.2 will have after receiving this new information.
Table 21 Updated Database for Node A.1.2
Node ID Description
A.1.2 Myself
A.1.3 My neighbor
A.1.1 A member of my group
A.2 A group connected to A.1 accessed by node A.1.2
A.3 A group connected to A.1 accessed by nodes A.1.2 and A.1.3
B A group connected to A accessed by groups A.2 and A.3
C A group connected to Group B
When a hierarchy is created, uplinks from the lowest level to the higher
levels are created. An uplink is a link from a node in the lower level of
hierarchy to a logical group node in a higher level. This link represents the
connection from the border node to its neighbor. Uplinks are shown for
the second level hierarchy group A in Figure 24.
Figure 24 Uplinks in a Hierarchy
PNNI Routing 83
Logical Link
Logical Uplink
Physical Link