Specifications

6-2
Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 6 Managing PNNI Nodes and PNNI Routing
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 6-1.
Figure 6-1 Example Hierarchical PNNI Network Topology Showing a Two-Level Hierarchy
In Figure 6-1, the five level-56 peer groups are isolated from each other until the upper level peer group
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.
Step 1 Establish a configuration session using a user name with SUPER_GP privileges or higher.
Step 2 Add the upper level PNNI logical node that will participate in the higher level PNNI group using the
following command.
8950_SF.7.PXM.a > addpnni-node level
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 48.
8950_SF.7.PXM.a > addpnni-node 48
Note You need to complete this step for all nodes that will serve as PGLs or backup PGLs.
66059 PNNI networks
Peer group 1
Peer
group 3
Peer
group 4
peer
group 5
Peer
group 5
Level 40
Level 56
Peer
group 2
Peer
group 2