Specifications

6-4
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 first time the dsppnni-election command was entered, the PGL state was OperNotPgl, which means
that the node is operating, but is not operating as a PGL. After the priority is changed, the PGL state
changes to AwaitUnanimity, which means the node is communicating with the other nodes in its peer
group to see if it has the highest priority and should be PGL. If you enter the dsppnni-election command
again after about 15 seconds, the PGL state changes as shown in the following example:
8950_SF.7.PXM.a > dsppnni-election
node index: 1
PGL state...... OperPgl Init time(sec)....... 15
Priority....... 250 Override delay(sec).. 30
Re-election time(sec) 15
Pref PGL...............56:160:47.00918100000100036b5e31b3.00036b5e31b3.01
PGL....................56:160:47.00918100000100036b5e31b3.00036b5e31b3.01
Active parent node id..48:56:47.009181000001000000000000.00036b5e31b3.00
node index: 2
PGL state...... OperNotPgl Init time(sec)....... 15
Priority....... 0 Override delay(sec).. 30
Re-election time(sec) 15
Pref PGL...............0:0:00.000000000000000000000000.000000000000.00
PGL....................0:0:00.000000000000000000000000.000000000000.00
Active parent node id..0:0:00.000000000000000000000000.000000000000.00
In the example above, the PGL state changes to show that logical node 1 is now the PGL. Notice that the
priority value is 250. An earlier example in this procedure set the priority to 200. When a node is elected
PGL, the node adds 50 to its priority value to prevent instability that might be caused by other peer group
nodes with a marginally higher priority value.
Step 5 Repeat this procedure for backup peer group leaders and be sure to set their priority value to a lower
value so that they operate as backup PGLs.
Enabling and Disabling Routes Through a Node
The restricted transit option allows you to allow or block call routes that pass through the node and
terminate on other nodes. The default setting for this option enables calls to pass through.
To enable or disable PNNI routing through a node, enter the cnfpnni-node command as follows:
8850_LA.7.PXM.a > cnfpnni-node <node-index > -transitRestricted on|off
Replace node-index with the index that identifies the logical node you are modifying, and enter either
on or off for the -transitRestricted parameter. When this parameter is set to on, the node only accepts
calls that terminate on this node. When the -transitRestricted parameter is set to off, the node accepts
calls that pass through the node and terminate on other nodes.