Cisco Systems OL-7396-01 Configuring the Node Election Leadership Priority

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ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter11 Configuring ATM Routing and PNNI
Basic PNNI Configuration
To configure a parent node, perform these steps, beginning in global configuration mode:
Example
The following example shows how to create a parent node for node 1:
Switch(config)# atm router pnni
Switch(config-pnni-node)# node 1
Switch(config-pnni-node)# parent 2
Displaying the Parent Node Configuration
To display the parent node configuration, use the following privileged EXEC command:
Example
The following example shows the ATM parent node information using the show atm pnni hierarchy
privileged EXEC command:
Switch# show atm pnni hierarchy
Locally configured parent nodes:
Node Parent
Index Level Index Local-node Status Node Name
~~~~~ ~~~~~ ~~~~~~ ~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~
1 80 2 Enabled/ Running Switch
2 72 N/A Enabled/ Running Switch.2.72
Configuring the Node Election Leadership Priority
Normally the node with the highest election leadership priority is elected PGL. If two nodes share the
same election priority, the node with the highest node identifier becomes the PGL. To be eligible for
election the configured priority must be greater than zero. You can configure multiple nodes in a peer
group with nonzero leadership priority so that if one PGL becomes unreachable, the node configured
with the next highest election leadership priority becomes the new PGL.
Note The choice of PGL does not directly affect the selection of routes across the peer group.
Command Purpose
Step1 Switch(config)# atm router pnni
Switch(config-atm-router)#
Enters ATM router PNNI mode.
Step2 Switch(config-atm-router)# node node-index Enters node configuration mode.
Step3 Switch(config-pnni-node)# parent node-index Configures the parent node index.
Command Purpose
show atm pnni hierarchy Displays the PNNI hierarchy.