Installation guide

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Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Chapter 3 Installing the IGX
Setting Up a UXM-E
Use the following command sequence for bringing up the trunk. You must bring up the trunk before you
add connections.
For more information on switch software commands, see the Cisco WAN Switching Command
Reference.
Step 1 To verify the correct card locations in both the local and remote nodes, enter the dspcds command.
Step 2 Configure the cellbus bandwidth allocation for the card if you do not plan to rely on automatic increases
from switch software. Use the superuser command cnfbusbw on the CLI to see and increase the current
allocation.
Note Cisco recommends that you not allow oversubscription. Refer to the Cisco IGX 8400 Series
Provisioning Guide for the description of cellbus bandwidth allocation and the Cisco WAN
Switching SuperUser Command Reference for a description of the cnfbusbw command. Any
user can view the current cellbus bandwidth allocation by using the dspbusbw command.
Step 3 Activate the trunk by using the uptrk command. Run this command on the nodes at both ends of the
trunk. On the CLI, use the vt command to reach the far-end node to run commands. The only trunk cards
you can connect to a UXM-E trunk are another UXM-E trunk card or a BXM in trunk mode. The syntax
of the single-port trunk specification is slot.port.
To specify an inverse multiplexing over ATM (IMA) trunk through the CLI, enter the uptrk
slot.first_line–last_line command. The line numbers must be contiguous.
Step 4 At each end, configure trunk parameters as required by using the cnftrk command. Each type of trunk
comes up with a default configuration, but you can alter the configuration with the cnftrk command.
Refer to the description of the cnftrk command in the Cisco WAN Switching Command Reference for
the parameters that apply to each interface.
Step 5 Use the addtrk command to add the trunk. Adding the trunk makes it a usable resource, so you can
subsequently add connections through Cisco WAN Manager or the CLI using the addcon command.
Add the trunk at only one node. If, after you add the trunk, you later determine that changes to the trunk
parameters are necessary, you can change certain parameters with the cnftrk command without taking
the trunk out of service.
Step 6 Optionally, configure a UXM-E trunk as a clock source by entering the cnfclksrc command.
Step 7 Configure the cellbus bandwidth allocation with the cnfbusbw command if you plan to activate many
ports or carry a large number of connections on the UXM-E trunk. Use the dspbusbw or cnfbusbw
command to check cellbus usage and changes in bandwidth requirements for the UXM-E. For
information on cellbus bandwidth needs, see the Cisco IGX 8400 Series Provisioning Guide.
Step 8 To configure physical and logical trunk statistics, use the cnfphyslnstats and cnftrkstats commands,
respectively. See the Cisco IGX 8400 Series Provisioning Guide for UXM-E trunk statistics.