Chapter 5 NMT Execute Commands

PNNI Routing

Table 5-2 Preferred and Directed Route Configuration

Topic

Required Settings

Comments

 

 

 

Modeling

Voice, Data, and Bursty Traffic

 

Preferred or

tables

If the Preferred_Route field is left blank or is invalid, this field is

Directed Routes

 

DR field: Enter Y if the connection

ignored.

 

 

has the directed routing feature,

 

 

and N otherwise.

 

 

Preferred_Route field: Enter a

All site names must be in the Site Table, and each consecutive pair

 

series of node cross-connects,

of sites must have a trunk in the Link Table. The originating and

 

separated by equal signs (=).

terminating sites are optional.

 

 

 

The NMT has an Actual Route field with the same format as Preferred Routes. CET Extractions fill in the Actual Route, which is the tree route of the connection at that time. The Used Preferred Routes option in Execute Settings determines which set of routes to use with the route command. Preferred routes are always used in failure analysis commands.

PNNI Routing

When modeling a PNNI Network, the following must be done in the CNF tables:

•Enter Y in the PNNI field of the Site Table to enable PNNI at each site.

•If the PNNI network is a multi group, specify the peer group each site belongs to in the PNNI_PG field. For multi-level peer group networks, each peer group must be entered in the PNNI domains table, with its level and parent defined.

•If you want a specific site to be a peer group leader, enter Y in the PGL field for that site. If none are selected, NMT will select a leader for you.

•Enter Y in the PNNI field of the Link Table to enable PNNI on the links.

•Set the RT_Metrics field in the Bursty Connection table to one of the three types of PNNI routing algorithms. The choices are AW for administrative weight, CTD for Cell Transfer Delay, or CDV for Cell Delay Variance.

Note The Model setting PNNI parameters can be adjusted.

Partitioned AutoRoute/PNNI Network

If the modeled network has AutoRoute and PNNI connections, use the steps in the “AutoRoute” and “PNNI Routing” sections above to configure each portion of the network. If any links are partitioned, the partitions are defined in the Interface table. The link Port IDs cross reference the interface table entries. If no partitions are specified, the NMT will optimize the partition based on the connection demand.

Note MPLS partitions can also be specified. However, the NMT model does not consider traffic on MPLS partitions.

 

 

Cisco WAN Modeling Tools Guide

 

 

 

 

 

 

OL-10426-01, Rev. A0

 

 

5-3

 

 

 

 

 

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Cisco Systems OL-10426-01 manual Pnni Routing, Partitioned AutoRoute/PNNI Network, Directed Routes
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OL-10426-01 specifications

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