Vsis And Virtual Trunking - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

Chapter 23 Configuring BXM Virtual Switch Interfaces
Step 2 Configure the trunk VPI by using the cnftrk command.
NOTE: ILMI automatically runs on the BXM card for virtual trunks.
This is not configurable by using the cnftrk command.
Step 3 Configure a VSI paritition on the virtual trunk interface by using the cnfrsrc command.
Step 4 Enable VSI ILMI functionality for the VSI partition by using the cnfvsipart command.
NOTE: VSI ILMI can be enabled for only one VSI partition on trunk interface.
To display VSI ILMI functionality on interfaces:
•

VSIs and Virtual Trunking

The
VSI master controllers can terminate connections on virtual trunk interfaces.
You activate and configure VSI resources on a virtual trunk using the same commands you use to
configure physical interfaces (for example,
an optional virtual trunk identifier that you append to the slot and port information to identify virtual
trunk interfaces.
A virtual trunk is a VPC that terminates at each end on the switch port. Each virtual trunk can contain
up to 64,000 VCCs, but it may not contain any VPCs.
Virtual trunk interfaces cannot be shared between VSI and Automatic Routing Management. Therefore,
configuring a trunk as a VSI interface prevents you from adding the trunk as an Automatic Routing
Management trunk. Similarly, a trunk that has been added to the Automatic Routing Management
topology cannot be configured as a VSI interface.
Virtual trunks on the BPX use a single configurable VPI. Because virtual trunk interfaces are dedicated
to VSI, the entire range of VCIs is available to the VSI controllers.
The virtual trunking feature introduces the concept of defining multiple trunks within a single trunk port
interface. This creates a fan-out capability on the trunk card. Virtual trunking is implemented on the
BNI, UXM, and BXM cards.
Once VSI is enabled on the virtual trunk, Automatic Routing Management does not include this trunk
in its route selection process.
To configure a VSI virtual trunk:
Step 1 Activate the virtual trunk by using the command
uptrk <slot.port.vtrunk>
Step 2 Set up VPI value and trunk parameters by using the command
cnftrk <slot.port.vtrunk>
Step 3 Enable VSI partition by using the command
cnfrsrc <slot.port.vtrunk>
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Display VSI ILMI status (whether enabled or not) for various VSI partitions on the interface by
using the dspvsipartcnf command.
feature lets you use BXM virtual trunks as VSI interfaces. Using this capability,
VSI virtual trunking
, ). The syntax you use to identify a trunk has
cnfrsrc dsprsrc
Cisco BPX 8600 Series Installation and Configuration
VSI Configuration Procedures
23-9