Specifications

4-9
Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 4 Cisco IGX 8400 Series Trunks
IGX Trunk Configuration
Setting Up a Trunk
Before setting up a trunk, finish setting up the nodes (see Chapter 3, “Cisco IGX 8400 Series Nodes”).
After setting up the nodes, follow this procedure to set up a trunk between the nodes:
Step 1 Confirm that the front and back cards supporting the desired line type and communication technology
for the trunk are in the slot you intend to use for the trunk.
Step 2 Activate the trunk so it can begin generating idle cells to allow end-to-end communication by running
the switch software uptrk command at each end of the trunk.
Tip If you run the uptrk command at only one end of the trunk, the trunk shows up in an alarm state on the
node. To clear the alarm, run the uptrk command at both ends of the trunk.
Step 3 Display the existing trunk parameters and determine which parameters need to be changed from the
default values with the switch software dsptrkcnf command.
Step 4 Override the default values for the trunk by running the switch software cnftrk command at each end of
the trunk.
Step 5 Add the trunk to the node with the switch software addtrk command. Adding the trunk causes the node
to see it as a usable resource. You do not have to use the addtrk command on both ends of the trunk.
Setting Up a Virtual Trunk
Note Virtual trunking is a purchased feature. Contact your Cisco account manager for more information (see
the “Obtaining Technical Assistance” section on page xiv).
Tip For information on setting up CoS, virtual slave interfaces, and other ATM services, see Chapter 8,
“Cisco IGX 8400 Series ATM Service.”
Configuring a Virtual Trunk on the IGX
Before setting up a virtual trunk, you must have finished setting up the nodes to be connected with a
virtual trunk. Follow this procedure to configure a virtual trunk on the IGX:
Step 1 If applicable, obtain a VPC from your ATM service provider or public ATM network administrator.
Step 2 Confirm that the right front cards and back cards are in the correct slot, and that there are no
compatibility issues.
Step 3 Activate the trunk with the switch software uptrk slot.port.vtrk command.
Step 4 Change the VPI to the value obtained from your ATM service provider with the switch software
cnftrk command. For UNI virtual trunks, the VPI can range from 1 to 255. For NNI virtual trunks, the
VIP can range from 1 to 4095.