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Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, Cisco MGX 8830, and Cisco MGX 8880 Configuration Guide
Release 5.0.10, OL-3845-01 Rev. B0, August 16, 2004
Chapter 3 Provisioning PXM1E Communication Links
Quickstart Provisioning Procedures
XLMI Link Configuration Quickstart
An Extended Link Management Interface (XLMI) link joins a PNNI network with an AutoRoute
network. After you establish an XLMI link, you can configure connections that link CPE in the PNNI
network with CPE in the AutoRoute network. The interconnection of PNNI and AutoRoute networks
enables network expansion beyond the limits of AutoRoute and facilitates a gradual migration from an
all AutoRoute network to an all PNNI network.
To establish an XLMI link, you need to do the following tasks:
1.
Configure a PXM1E port for the XLMI link.
2.
Configure a BXM port for the XLMI link.
3.
Create a connection between a destination on the PNNI network and a destination on the AutoRoute
network.
The quickstart procedure in this section describes how to configure a PXM1E port to support an XLMI
link, and references the instructions for creating a connection between the PNNI and AutoRoute
networks. Before you begin configuration, consider the following guidelines and limitations:
•
XLMI cannot be provisioned on a port which already has connections provisioned. To change the
port to XLMI, you must first delete all existing connections.
•
The control VC for LMI uses VPI = 3 and VCI = 31. These numbers are not allowed on other types
of connections.
•
Each PXM1E card supports a maximum of 16 links to AutoRoute networks and feeder nodes.
•
Each PXM1E port can support one link to an AutoRoute network, so the maximum number of links
to AutoRoute networks is equal to the maximum number of physical PXM1E ports.
•
XLMI links support SPVCs and SPVPs. SVCs and LVCs are not supported.
•
XLMI is not supported on virtual trunks.
•
The various XLMI timers are not configurable on the PXM1E. Timer configuration is done on the
BPX. The values for the LMI timers on PXM1E are
–
LMI SPVC Status Enquiry Timer (T393): 10 sec
–
LMI SPVC Update Status Timer (T394): 10 sec
–
LMI Retry Timers (N394 and N395): 5 sec
The following quickstart procedure provides a summary of the tasks required to configure XLMI links
on Cisco MGX 8850 (PXM1E) and Cisco MGX 8830 switches.
Command
Purpose
Step 1
username
<password>
Start a configuration session.
Note
To perform all the steps in this quickstart procedure, you
must log in as a user with SUPER_GP privileges or
higher.
Step 2
Bring up PXM1E lines as described in the “
,” which appears earlier in this chapter.
