Figure 8-1 Example Hierarchical Pnni Network Topology Showing A Two-Level Hierarchy - Cisco MGX 8850 (PXM1E/PXM45) Configuration Manual

Managing PNNI Nodes
The actual procedure for creating an upper level peer group for your WAN depends on the structure of
your WAN. This section shows how to create an upper level peer group for the WAN shown in
Figure
Figure 8-1
Peer Peer
group 2 group 2
Peer
group 3
In Figure
is created. The members of the upper level peer group are the peer group leaders from the lower level
peer groups. To create an upper level peer group, you need to configure the peer group leaders and add
the upper level PNNI process to each peer group leader (PGL) node. It is also a good practice to
configure secondary peer group leaders that can take over if a PGL fails.
To configure peer group leaders, use the following procedure.
Establish a configuration session using a user name with SUPER_GP privileges or higher.
Step 1
Add the upper level PNNI logical node that will participate in the higher level PNNI group using the
addpnni-node <level> command.
Replace level with the PNNI level for the higher level peer group. The PNNI level value must be smaller
than the level value for the lower level peer groups. The following example creates a logical PNNI node
at PNNI level 40.
PXM1E_SJ.7.PXM.a > addpnni-node 40
Note
Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
8-2
8-1.
Example Hierarchical PNNI Network Topology Showing a Two-Level Hierarchy
8-1, the five level-56 peer groups are isolated from each other until the upper level peer group
You need to complete this step for all nodes that will serve as PGLs or backup PGLs.
Chapter 8
Peer group 1
PNNI networks
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Managing PNNI Nodes and PNNI Routing
Level 40
Peer peer
group 5 group 5
Level 56
Peer
group 4