Figure 4-3 Adding A Third Pnni Node For Next Level Connectivity - Cabletron Systems SmartSwitch 6500 User Manual

PNNI Routing
Add a third node (at level 64) to either switch SWA3 or SWB3.
2.
Use the
3.
set pnnipglelection
PGL for the parent peer group, and specify the third node as the parent node of the second.
Perform steps 2 and 3 for switches with the same role in the other level 72 parent groups.
4.
These steps create a grandparent group at level 64, and establishes a virtual link between the LGNs that represent the
LGNs at level 72 (see Figure 4-3).
Third node
Second node
SWA3
PGL
First nodes
SWA3
PGL

Figure 4-3 Adding a third PNNI node for next level connectivity

command to designate the switch's second node (not third) as the
Grandparent Group
SWA3
LGN
Virtual Link
SWB3
PGL
Lowest Peer Groups
Level 64
Virtual Link
Level 72
PGL
Parent Groups
PGL
Level 80
Multi-level PNNI Topology
LGN
Virtual Link
PGL
SmartSwitch 6500 User Guide 4-7