Cisco OL-10426-01 User manual

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Cisco WAN Modeling Tools User Guide
Release 15.3.00
May 2006
Customer Order Number:
Text Part Number: OL-10426-01

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Cisco WAN Modeling Tools Guide
Copyright © 2006, Cisco Systems, Inc.
All rights reserved.

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CONTENTS
Preface ix
Related CWM and Switch Documentation ix
Obtaining Documentation x
Cisco.com xi
Documentation DVD xi
Ordering Documentation xi
Documentation Feedback xi
Cisco Product Security Overview xii
Reporting Security Problems in Cisco Products xii
Obtaining Technical Assistance xiii
Cisco Technical Support Website xiii
Submitting a Service Request xiii
Definitions of Service Request Severity xiv
Obtaining Additional Publications and Information xiv
CHAPTER 1Overview of the WAN Modeling Tools 1-1
Cisco WAN Modeling Tools Overview 1-1
Functionality of the NMT 1-2
Cisco Products Supported by the NMT 1-3
Basic Usage/Charter Functionality 1-4
Gaps 1-5
Data Translation Tools 1-6
CHAPTER 2Installing the Cisco WAN Modeling Tools 2-1
System Requirements 2-1
Installing the NMT 2-2
Installing the NMT on a UNIX Platform 2-2
Installing the NMT on a PC Platform 2-5
Upgrading the NMT Software 2-6
Starting the NMT 2-6
Removing NMT 2-7
Installing a Cisco WAN Modeling Tools Sub-application 2-7
Installing the Cisco WAN Modeling Tools sub-applications on a UNIX Platform 2-8

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Installing the SSI on a PC Platform 2-8
Removing Sub-applications 2-9
Troubleshooting NMT Installation 2-9
CHAPTER 3Using the NMT 3-1
NMT Startup 3-1
NMT Menu Bar 3-2
File Menu 3-3
Configure Menu 3-4
Execute Menu 3-7
Display Menu 3-7
Report Menu 3-8
Maintenance Menu 3-9
Help Menu 3-9
Quit 3-9
Keyboard Commands 3-9
Help Keys 3-11
Message Keys 3-11
Modeling Processes 3-11
Error Checking 3-12
Troubleshooting NMT 3-13
CHAPTER 4Configuration Tables and Fields 4-1
General Table Information 4-1
Sites Table 4-2
Configuring Sites Example 4-6
Links Table 4-6
Minimal Link Table Usage 4-7
Link Special Cases 4-10
IMATM Trunks 4-10
Virtual Trunks 4-11
Voice Table 4-11
Data Table 4-14
Bursty Table 4-17
Bursty Table Special Cases 4-23
Interface Table 4-24
Feeder Table 4-26

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Card Table 4-27
Groups and Network Table 4-28
Nodes Table 4-29
Network Settings 4-29
Model Options 4-31
Feeders 4-32
Modeling Implicit Feeders 4-32
Modeling Explicit Feeders 4-34
Obsolete Products 4-35
Networks with Access Feeders or Access Concentrators 4-36
FastPAD 4-38
Port Concentrator 4-41
Tiered Networks 4-42
CHAPTER 5NMT Execute Commands 5-1
Using the Route Command 5-1
AutoRoute 5-1
AutoRoute Least Cost Routing 5-1
Preferred and Directed Routes 5-2
PNNI Routing 5-3
Partitioned AutoRoute/PNNI Network 5-3
Fail Analysis Command 5-4
Build Sites Command 5-4
Optimize Command 5-5
NMT Command Results 5-6
CHAPTER 6NMT Reports 6-1
Site Report 6-1
Link Report 6-1
Network Summary Report 6-1
Link Load Report 6-2
ATM & FR Ports Report (or Bursty Data Ports Report) 6-3
Data & Voice Ports Report (or Voice & Data Ports Report) 6-3
Connection Routes Report 6-3
Failed Connections Report 6-3
Parts List Report 6-4
Resource Report/Card Statistics Report 6-4
PNNI Topology Report 6-5

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View Summary 6-5
Using the Map Tool 6-5
CHAPTER 7NMT Utilities Command Line 7-1
CHAPTER 8NMT Map 8-1
NMT Map Startup 8-1
Navigating Though a Network View 8-3
Obtaining Link Information - Physical Links 8-5
Obtaining Link Information - Logical Links 8-5
Zooming the Map 8-6
Panning the Map 8-7
Map Color Coding 8-7
Controlling Map Displays in NMT 8-7
NMT Map Main Menu 8-8
Adding New Groups 8-10
Adding Nodes to Existing Groups 8-11
Deleting Groups 8-12
Deleting Nodes or Groups from Existing Groups 8-12
Saving Your Work 8-13
Retrieving Map Data Into NMT 8-14
Using the Map Tool with Fail Analysis 8-14
Using the Map Tool to Analyze Traffic Levels 8-14
CHAPTER 9Configuration Extraction Tool 9-1
Fields Addressed by CET 9-1
Using the CET 9-2
Other CET Commands 9-4
AIX Platform Support 9-5
Troubleshooting CET 9-5
Remote CET Extracts 9-8
Troubleshooting 9-10
CHAPTER 10 WANDL — Third-Party Interface 10-1
Translating Between NMT and WANDL Formats 10-1
Converting NMT Configuration Files into WANDL Files 10-2

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Converting WANDL Files into NMT .cnf Files 10-4
CHAPTER 11 SpreadSheet Interface 11-1
NMT to Microsoft Excel 11-1
Microsoft Excel to NMT 11-4
Usage Review 11-5
SSI TroubleShooting 11-6
CHAPTER 12 Cisco Network Designer Importer 12-1
CND PC Import Utilities 12-1
Installing the NMT2CND file 12-1
Nmt2Cnd Operating Instructions 12-2
Installing The DBF2Cnd Utility 12-2
DBF2Cnd Operating Instructions 12-3
CND PC Utilities 12-4
I NDEX

Contents
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Preface
The Cisco WAN Modeling Tools User Guide provides instructions for using the WAN Modeling Tools,
a design aid for WANs. The WAN Modeling Tools consist of the following software tools:
•Network Modeling Tool (NMT). UNIX and PC versions are available.
•Map Tool to display a graphical model of network topology.
•Configuration Extraction Tool (CET) for retrieving existing topologies from the Cisco Wan Manager
(CWM) database.
•Conversion Plug-ins: the Third-Party Interface (TPI) for sharing NMT information with WANDL
and the SpreadSheet Interface (SSI) for exchanging NMT configurations with Microsoft Excel.
These tools are integrated into NMT, but are also available as UNIX stand alone commands.
•Cisco Network Designer (CND) importing tool for importing and storing topologies in a project
format.
The guide is written for anyone who operates or manages a WAN and has a general understanding of
data communications concepts, some knowledge of UNIX and/or PC desktop, and knowledge of the
interfaces used by devices connected to their WAN.
Related CWM and Switch Documentation
A Guide to Cisco Multiservice Switch Documentation ships with your product. This guide contains
general information about how to locate Cisco MGX, BPX, SES, and CWM documentation online.
These documents comprise the CWM documentation set. The first five documents are on the CWM
Documentation CD and on Cisco.com:
•Cisco WAN Manager Installation Guide, Release 15.3.00
•Cisco WAN Manager User’s Guide, Release 15.3.00
•Cisco WAN Manager SNMP Service Agent Guide, 15.3.00
•Cisco WAN Manager Database Interface Guide, Release 15.3.00
•Cisco WANDEST Installation and Reference, Release 2.7
These documents are available on Cisco.com:
•Release Notes for Cisco WAN Manager, Release 15.3.00
•Release Notes for the Cisco WAN Modeling Tools, Release 5
•Cisco WAN Modeling Tools User Guide, 15.3.00

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Obtaining Documentation
•Release Notes for CWM Automated Bulk Provisioning, Release 15.3.00
•Cisco WAN Manager Automated Bulk Provisioning Guide, Release 15.3.00
The CWM Modeling Tools and Automated Bulk Provisioning user guides are also available on their
software CDs and ordered separately.
Refer to the current CWM release notes for information on all the switch products that CWM supports
and that are certified in this release.
You can access all CWM documentation at this website:
http://www.cisco.com/en/US/products/sw/netmgtsw/ps2340/tsd_products_support_series_home.html
These documents support this release of the Cisco Multiservice Switch products and are shipped with
the product:
•Regulatory Compliance and Safety Information for Cisco Multiservice Switch Products (MGX, BPX,
and SES)—Familiarizes you with safety precautions for your product.
•A Guide to Cisco Multiservice Switch Documentation—Describes how to find the manuals and
release notes that support multiservice switches and network management products. These
documents are available only online. This guide ships with the product.
•Installation Warning Card—Contains precautions that you should take before you insert a card into
a slot. This Warning Card ships with the product.
You can access the MGX switch documentation at this website. See MGX Switches:
http://www.cisco.com/en/US/products/hw/switches/tsd_products_support_category_home.html
Refer to these MGX technical manuals as appropriate:
•For planning information if your network contains MGX and SES products—Cisco PNNI Network
Planning Guide for MGX and SES Products
•For information about installing cards and cables in the MGX chassis:
– Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, and Cisco MGX 8830 Hardware
Installation Guide, Releases 2 Through 5 for installing cards and cables in these chassis.
– Cisco MGX 8xxx Edge Concentrator Installation and Configuration Guide for installing cards
and cables in the Cisco MGX 8230, Cisco MGX 8250, or Cisco MGX 8850 (PXM1) chassis.
•For configuring your MGX switch and processor cards:
– Cisco MGX 8850 (PXM1E/PXM45), Cisco MGX 8950, and Cisco MGX 8830 Configuration
Guide, Release 5 for these chassis.
– Cisco MGX 8xxx Edge Concentrator Installation and Configuration Guide for the Cisco MGX
8230, Cisco MGX 8250, or Cisco MGX 8850 (PXM1) chassis.
You can also use Cisco.com to search for any product and topic by entering a word or phrase in the
Search window. For example, you can search for “configuring MGX 8850” or “PXMIE.” By using the
Advanced Search option, you can search the entire Cisco.com or Technical Support & Documentation.
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several
ways to obtain technical assistance and other technical resources. These sections explain how to obtain
technical information from Cisco Systems.

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Documentation Feedback
Cisco.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/univercd/home/home.htm
You can access the Cisco website at this URL:
http://www.cisco.com
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation DVD
Cisco documentation and additional literature are available in a Documentation DVD package, which
may have shipped with your product. The Documentation DVD is updated regularly and may be more
current than printed documentation. The Documentation DVD package is available as a single unit.
Registered Cisco.com users (Cisco direct customers) can order a Cisco Documentation DVD (product
number DOC-DOCDVD=) from the Ordering tool or Cisco Marketplace.
Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/
Cisco Marketplace:
http://www.cisco.com/go/marketplace/
Ordering Documentation
You can find instructions for ordering documentation at this URL:
http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
You can order Cisco documentation in these ways:
•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from
the Ordering tool:
http://www.cisco.com/en/US/partner/ordering/
•Nonregistered Cisco.com users can order documentation through a local account representative by
calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in
North America, by calling 1 800 553-NETS (6387).
Documentation Feedback
You can send comments about technical documentation to [e-mail].

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Cisco Product Security Overview
You can submit comments by using the response card (if present) behind the front cover of your
document or by writing to the following address:
Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
Cisco Product Security Overview
Cisco provides a free online Security Vulnerability Policy portal at this URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
From this site, you can perform these tasks:
•Report security vulnerabilities in Cisco products.
•Obtain assistance with security incidents that involve Cisco products.
•Register to receive security information from Cisco.
A current list of security advisories and notices for Cisco products is available at this URL:
http://www.cisco.com/go/psirt
If you prefer to see advisories and notices as they are updated in real time, you can access a Product
Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed from this URL:
http://www.cisco.com/en/US/products/products_psirt_rss_feed.html
Reporting Security Problems in Cisco Products
Cisco is committed to delivering secure products. We test our products internally before we release them,
and we strive to correct all vulnerabilities quickly. If you think that you might have identified a
vulnerability in a Cisco product, contact PSIRT:
•Emergencies—[email protected]
•Nonemergencies— [email protected]
Tip We encourage you to use Pretty Good Privacy (PGP) or a compatible product to encrypt any sensitive
information that you send to Cisco. PSIRT can work from encrypted information that is compatible with
PGP versions 2.xthrough 8.x.
Never use a revoked or an expired encryption key. The correct public key to use in your correspondence
with PSIRT is the one that has the most recent creation date in this public key server list:
http://pgp.mit.edu:11371/pks/lookup?search=psirt%40cisco.com&op=index&exact=on
In an emergency, you can also reach PSIRT by telephone:
•1 877 228-7302
•1 408 525-6532

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Obtaining Technical Assistance
Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco
Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical
Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical
Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service
contract, contact your reseller.
Cisco Technical Support Website
The Cisco Technical Support Website provides online documents and tools for troubleshooting and
resolving technical issues with Cisco products and technologies. The website is available 24 hours a day,
365 days a year, at this URL:
http://www.cisco.com/techsupport
Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password.
If you have a valid service contract but do not have a user ID or password, you can register at this URL:
http://tools.cisco.com/RPF/register/register.do
Note Use the Cisco Product Identification (CPI) tool to locate your product serial number before submitting
a web or phone request for service. You can access the CPI tool from the Cisco Technical Support
Website by clicking the Tools & Resources link under Documentation & Tools. Choose Cisco Product
Identification Tool from the Alphabetical Index drop-down list, or click the Cisco Product
Identification Tool link under Alerts & RMAs. The CPI tool offers three search options: by product ID
or model name; by tree view; or for certain products, by copying and pasting show command output.
Search results show an illustration of your product with the serial number label location highlighted.
Locate the serial number label on your product and record the information before placing a service call.
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3
and S4 service requests are those in which your network is minimally impaired or for which you require
product information.) After you describe your situation, the TAC Service Request Tool provides
recommended solutions. If your issue is not resolved using the recommended resources, your service
request is assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone.
(S1 or S2 service requests are those in which your production network is down or severely degraded.)
Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business
operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: [phone] (Australia: 1 800 805 227)
EMEA: [phone]
USA: 1 800 553-2447
For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts

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Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity
definitions.
Severity 1 (S1)—Your network is “down,” or there is a critical impact to your business operations. You
and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your
business operation are negatively affected by inadequate performance of Cisco products. You and Cisco
will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations
remain functional. You and Cisco will commit resources during normal business hours to restore service
to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or
configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online
and printed sources.
•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit
Cisco Marketplace, the company store, at this URL:
http://www.cisco.com/go/marketplace/
•Cisco Press publishes a wide range of general networking, training and certification titles. Both new
and experienced users will benefit from these publications. For current Cisco Press titles and other
information, go to Cisco Press at this URL:
http://www.ciscopress.com
•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and
networking investments. Each quarter, Packet delivers coverage of the latest industry trends,
technology breakthroughs, and Cisco products and solutions, as well as network deployment and
troubleshooting tips, configuration examples, customer case studies, certification and training
information, and links to scores of in-depth online resources. You can access Packet magazine at
this URL:
http://www.cisco.com/packet
•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies
learn how they can use technology to increase revenue, streamline their business, and expand
services. The publication identifies the challenges facing these companies and the technologies to
help solve them, using real-world case studies and business strategies to help readers make sound
technology investment decisions. You can access iQ Magazine at this URL:
http://www.cisco.com/go/iqmagazine
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering
professionals involved in designing, developing, and operating public and private internets and
intranets. You can access the Internet Protocol Journal at this URL:
http://www.cisco.com/ipj

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•World-class networking training is available from Cisco. You can view current offerings at
this URL:
http://www.cisco.com/en/US/learning/index.html

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CHAPTER
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Overview of the WAN Modeling Tools
This chapter provides an overview of the applications that make up the Cisco WAN Modeling Tools, and
of the Cisco products they support.
Cisco WAN Modeling Tools Overview
Cisco WAN Modeling Tools includes the following tools:
•The Network Modeling Tool (NMT)
•The Configuration Extraction Tool (CET)
•The Third-Party Interface (TPI)
•The Spread Sheet Interface (SSI)
The NMT is the primary application of the Cisco WAN Modeling Tools. NMT verifies the provisioning
and predicts the routing behavior of the network. NMT supports the following Cisco MSSBU ATM
platforms:
•MGX series
•BPX series
•IGX series
For each major switch software release, NMT verifies the physical and logical provisioning of the front
and back cards that support the specified topology. NMT also verifies connection routing and rerouting
capabilities of each supported switch in the network.
The CET, SSI, and TPI tools enable the exchange of information between the NMT and other
applications. These tools provide interfaces to CWM, Excel, and WANDL.

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Functionality of the NMT
Figure 1-1 shows the relationship between the applications that make up the Cisco WAN Modeling
Tools.
Figure 1-1 Relationship between the Cisco WAN Modeling Tools
Functionality of the NMT
The NMT is a menu driven application that enables you to model the behavior of both simple and
complex networks. The program processes information provided by you and returns a proposed
configuration. This configuration can then be modified and reprocessed to add redundant links, support
additional sites, and so forth. You can also perform failure analysis of the network model by failing
selected links and then evaluating the rerouting capability of the remaining links. The NMT allows you
to interface to WANDL and other systems to further optimize the design.
Only a few fields need to be completed in order for the NMT to generate a configuration. To create the
best configuration possible,. you should have extensive knowledge of computer networks, including
ATM and Frame Relay networks. In addition, entering precise values for optional fields will help the
NMT provide you with a precise parts list that you can use to order Cisco products.
Once the NMT processes the data, it provides configuration information in the following form:
•Updated tables—Modifies your configuration tables as necessary to create a working configuration.
•Reports—Provides a series of reports that describe links, nodes, part numbers, costs, and so on.
•Graphical display—Displays your network design graphically with node icons and maps.
•Import/Export—Displays data imported/exported to other systems.
The NMT always selects the newest available parts for a function, based on the software release you
specify. You can explicitly request older cards from the input tables. Some obsolete parts are not
supported.
NMT
netowork
topology
data
CWM
CND
WANDL
NMT
EXCEL
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Cisco Products Supported by the NMT
Cisco Products Supported by the NMT
New functionality is added in each release of the NMT to accurately reflect the current capabilities of
the following Cisco equipment:
•MGX 8850, MGX 8830, and MGX 8950 switches—Enables a wide range of user services to be
supported by the BPX service node. Interfaces supported by the NMT include the following:
– Frame Relay
– ATM User-Network Interface (UNI)
– Circuit emulation
– n x T1/E1 inverse multiplexing for ATM (IMATM AUSM-8) UNI
– 3T3 interface using the SRM-3T3 module
•MGX 8220, MGX 8230, and MGX 8250 edge concentrators—MGX Edge concentrators enable a
wide range of user services to be supported by the BPX service node. Interfaces supported by the
NMT include the following:
– Frame Relay
– ATM User-to-Network Interface (UNI)
– Circuit emulation
– n x T1/E1 inverse multiplexing for ATM (IMATM AUSM-8) UNI
– 3T3 interface using the SRM-3T3 module
•BPX switch—A standards based high-capacity (9.6 Gb) broadband ATM switch that provides
backbone ATM switching and delivers a wide range of user services. Fully integrated with the IPX
and IGX switches, the BPX switch provides broadband ATM services when ASI and BXM cards are
used. It also provides a variety of narrowband services; these services are provided by tiered network
configurations that use IPX switches and MGX 8220 feeders.
The BPX switch supports the high density Broadband Switch Module (BXM) cards that provide
standard interfaces for connecting to cell-based equipment by way of the ATM User-Network
Interface (UNI).
– BXM DS3/E3 supports E3/DS3 native ATM access and trunk ports.
– BXM 155 supports OC-3/STM-1 native ATM access and trunk ports.
– BXM 622 supports OC-12/STM-4 native ATM access and trunk ports.
BXM cards also support ATM Frame Relay networks and services and enables configuration of
permanent virtual circuits (PVCs) or switched virtual circuits (SVCs) for the following defined
service classes:
– Constant bit rate (CBR)
– Variable bit rate (VBR)
– Unspecified bit rate (UBR)
– Available bit rate (ABR)
•SES PNNI Controller—Attaches to a BPX switch to provide Private Network-to-Network Interface
(PNNI) signaling and routing for the establishment of ATM switched virtual circuits (SVCs) and soft
permanent virtual circuits (SPVCs) over a BPX 8600 wide area network (WAN). Features supported
by the NMT include PNNI Routing, resource partitioning, and shelf provisioning.

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Basic Usage/Charter Functionality
•IGX switch—A multi-service ATM networking switch that provides interfaces to support legacy and
emerging broadband applications. It supports ATM technology over subrate, narrowband E1 and T1,
and broadband E3 and T3 trunks. The IGX switch is used as the basis for a leased-line campus,
metropolitan area network (MAN) and WAN network, as an intelligent access device to high
speed-public digital services such as ATM, in a hybrid application using both, and as a WAN service
switch.
•Generic Node -- The NMT allows you to create your own node type for an ATM switch or feeder.
Use the node table to provide the high level specifications for the WAN product.
•Obsolete Equipment -- The NMT models obsolete equipment that users may encounter in CWM
extracts, and need to model for upgrade considerations. The following obsolete platforms are
modeled:
IPX switch, 3810 feeder, FastPad feeder, Port Concentrator Shelf Feeder
Basic Usage/Charter Functionality
The NMT models the WAN network using a classic node, link, and demand model. The nodes are the
sites in the site table, which are provisioned as Cisco MSSBU WAN switches. The links are the inter
switch trunks in the link table. The connections are specified in the voice, data, and bursty table.
The model provisions the network using the latest Cisco equipment, unless otherwise specified. The
model will verify that the network will route all connections, or will report on what resources have been
exceeded.
The NMT tool predicts the behavior of a WAN network that uses Cisco WAN switches (MGX, BPX and
IGX product series) as follows:
1. the user specifies the site locations and switch types, the links, and the connections in the network.
2. the NMT uses the AutoRoute and PNNI routing algorithms identical to those in the products.
3. based on the Connection Admission Control (CAC) parameters, the NMT verifies that the links and
connections can be provisioned, and that the connections can be routed.
4. the WAN network is modeled at the chassis, front card, and back card granularity level.
Note All connections used by the NMT are ATM connections, with the exception of some legacy IGX voice
and data services.
Keep the following in mind when you use the NMT:
•The NMT provides the primary reason any connections cannot be provisioned or routed, based on
the CAC rules.
•The NMT does not do discrete simulation, and no real time statistics are involved in the modeling.
•The NMT address the following real time issues only:
– delay estimate
– requirements specified in the CAC.
•The NMT verifies the connections routed in the base state
•The NMT verifies which connections will re-route under any network failure scenario.