Reconfiguring A Trunk; Table 18-2 Interface Types Supported On The Same Card - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 18 Configuring Trunks and Adding Interface Shelves
You can configure port, routing trunk, and feeder trunk interfaces simultaneously on a slot containing
a BXM card. For example, you can up port 1 on a BXM slot as a trunk interface while also upping port
2 as a line interface. For BXM cards, you do not need to upgrade the firmware.
You cannot use a virtual trunk as an interface shelf (feeder) trunk; similarly, you cannot configure an
interface shelf trunk to act as a virtual trunk. Similarly, you cannot terminate interface shelf (feeder)
connections on a virtual trunk.

Table 18-2 Interface Types Supported on the Same Card

Interface Type
Physical trunks
Virtual trunk
Interface shelf (feeder) trunks
Ports (UNI)
To set up a trunk:
Use the uptrk command to activate the trunk.
Step 1
Use the uptrk command to activate the port so that it can start to generate framing. It also determines
whether the trunk is a physical-only trunk or a virtual trunk. The third digit you specify in the
command (represented by
see Chapter 25, Configuring BXM Virtual Trunks.
Use uptrk at each end of the trunk. When the trunk is upped at only one end, the node detects the trunk
as being in an alarm state (see dsptrks). Upping the trunk at both ends clears the alarm.
Use the cnftrk command to override the trunk's default values. You must use cnftrk for virtual trunks,
Step 2
but it is an optional command for physical trunks. For virtual trunks, you must change the VPI to a
non-0 value before executing addtrk.
If you use cnftrk, you must make the same changes at both ends of the trunk. To display existing trunk
parameters, use the dsptrkcnf command. The configurable parameters are listed for each card type in
Table 18-1. (The possible parameters are PKT for FastPackets, ATM cells, BNI if the trunk is a BNI
card, or All.) Not all of these parameters apply to the BPX node.
After you configure the trunk and add the trunk (addtrk), you can respecify certain parameters. For
example, a period of trunk use may give you enough information to indicate that you should change
parameters to optimize how the trunk is used.
Use addtrk to add the trunk. Adding the trunk makes the trunk a usable resource, so you can add
Step 3
connections (addcon) to carry traffic. You need only add one end of the trunk.

Reconfiguring a Trunk

This section describes how to change trunk parameters after you have added the trunk.
After you have added a trunk, you can reconfigure some parameters without first deleting the trunk
(with deltrk). This means that you can reconfigure the following list of trunk and line parameters when
the port is in use (active). The
parameters that are not configurable.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
BXM
supported
supported
supported
supported
) indicates that the trunk is virtual. For details on virtual trunking,
slot.port.vtrk
display highlights all configurable parameters, and dims
cnftrk
Cisco BPX 8600 Series Installation and Configuration
Configuring Trunks
UXM
supported
supported
not supported
supported
uptrk
18-3