Cisco BPX 8600 Series, Руководство по установке и настройке

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18-5
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 18 Configuring Trunks and Adding Interface Shelves
Configuring Trunks
To display the current trunk parameters, use dsptrkcnf. If you can make all the needed parameter
changes without deleting the trunk, execute cnftrk. Use cnftrk at both ends of the trunk.
To change parameters that require you to first delete the trunk:
Step 1 Delete the trunk by executing deltrk at one end of the trunk.
Step 2 Execute cnftrk at both ends of the trunk to reconfigure parameters.
Step 3
Execute addtrk at only one end of the trunk to add the trunk.
Switch software triggers a reroute of connections only if a change to a parameter results in too few
resources to support the current load of connections.
If you attempt to change one of these parameters, the other endpoint will be updated by switch software.
It is not necessary to chagne both endpoints’ parameters.
Before Release 9.2, changes made to the following three parameters caused a reroute on the trunk:
• Statistical reserve
• Trunk Partitions SVC/PVC
•
Maximum PVC Channels
For example, any increase to Statistical reserve would cause a reroute of all connections on the trunk.
Any changes you make to these parameters will cause reroutes to PVCs on the trunk only if resources
are no longer available to support the current connection load
Note that MPLS partitions will not be affected by trunk/line reconfiguration, because label switching
partitions cannot be inreased beyond the available number of resources.
For a trunk between a node running Release 9.2 and node running an earlier release (such as 9.1 or 8.5),
you will be prompted that you can change a parameter only if both ends allow such a change.
Removing a Trunk
To remove a trunk:
Step 1 Use the deltrk command to delete the trunk. If both nodes are reachable, perform this command at one
end of the trunk only. Otherwise, you must perform this command at both ends. QConnections using
the deleted trunk that cannot be rerouted are automatically deleted.
Step 2 Use the dntrk command to down the trunk. Execute dntrk at both ends of the trunk.
Displaying or Printing Trunk Configurations
You can display the network trunk configuration on the screen or print it on the printer in a one-step
process by using any one of the following commands.
• dsptrks
Displays the current trunk configuration and alarm status at a node.
• prttrks
Prints the current trunk configuration and alarm status at a node.