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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
It is beyond the scope of this guide to describe how to configure each model of the CPE to communicate
with the switch. To complete this configuration, you will need to learn the capabilities of the CPE and
the switch and define a set of communications parameters that are supported by both devices. For
example, the Cisco MGX switches support UNI 3.1 communications, but if the CPE does not, you must
select a signaling protocol (such as UNI 3.0) that is supported by both devices.
Once all the requirements have been met for SVC connections, CPE devices can establish SVC
connections to other CPE devices on the same switched network.
SPVC and SPVP Configuration Quickstart
A soft permanent virtual circuit (SPVC) is a permanent virtual circuit (PVC) that can be rerouted using
the Private Network-to-Network Interface (PNNI) Version 1.0 protocol. As with PVCs, SPVCs are
full-time connections. A PVC, however, uses a predefined circuit path and will fail if the path is
interrupted. Using the PNNI protocol, SPVCs can be rerouted to avoid failed communication links or to
use links that offer better bandwidth.
An SPVP is a permanent virtual path that can be rerouted using the PNNI Version 1.0 protocol. The
difference between an SPVC and an SPVP is that the SPVP supports multiple VCIs, whereas an SPVC
is by definition a single virtual circuit. As with SPVCs, when an SPVP fails, PNNI can determine if an
alternate route exists and reroute the connection.
The quickstart procedure in this section provides a summary of the tasks required to configure SPVCs
and SPVPs on Cisco MGX 8850 (PXM1E) and Cisco MGX 8830 switches. This procedure is provided
as an overview and as a quick reference for those who have previously configured these types of
connections.
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 GROUP1 privileges or higher.
Step 2
See “
,” which appears earlier
in this chapter.
Configure the trunks that link the switches to which the ATM end
stations connect.
Step 3
dsppnni-reachable-addr
network
Verify PNNI connectivity between the two nodes that will host
the SPVC or SPVP end points.
See “
Verifying End-to-End PNNI Communications
,” which
appears later in this chapter.
Step 4
See “
,” which
appears earlier in this chapter.
Configure lines for the ATM end stations at each end of the SPVC
or SPVP, and assign either static or dynamic addressing to each
line.
