Chapter 4 Configuration Tables and Fields

Feeders

Implicit IGX and IPX feeders can be generated when an IGX is used as the hub, but only when the traffic demands on the IGX exceed the resources of one node. Therefore, if the hub is an IGX, and you want to design IGX or IPX feeders, it is better to make the feeders explicit.

Implicit MGX 8820 feeders are generated when a BPX is used as a hub node, and the Bursty Traffic table contains connections designated for MGX 8220.

Refer to Table 4-19for information on modeling an implicit feeder tiered network with the NMT.

Table 4-19 Tiered Network Configurations with Implicit Feeders

Topic

Required Settings

Comments

 

 

 

IPX/IGX Feeders

Sites table

Only IGX and BPX can be used as hubs. An IGX hub will

 

Site field: Enter the name of the hub node

only generate implicit feeders when the resources required

 

exceed those allowed by an IGX.

 

Type field: Enter BPX or IGX.

 

 

 

Tiered feeder flag: Enter Y if implicit IPX should be a

 

 

tiered feeder.

 

 

IGX field: Enter N for IPX and Y for IGX.

 

 

BC field: Enter T3 or E3.

Specify type of feeder for BPX/IGX type of site in the Sites

 

table; specify the type of the link between hub and feeder.

 

FC field: Enter AIT.

 

 

 

RLC field: Enter Y for trunk card redundancy.

The redundancy of feeder links is determined by the RLC

 

 

 

 

field in the Sites table.

 

 

 

 

Voice, Data, or Bursty Traffic tables

Voice and data connections on IPX or IGX tiered network

 

Site fields: Enter the name of the hub node

feeders may only terminate on another IPX or IGX feeder.

 

 

 

Type field: Enter any valid IGX or IPX Voice, Data, or

 

 

Frame Relay connection type (that is not supported on

Hub IDs and feeder IDs are not defined for implicit IPX/IGX

 

BPX.)

feeders. To specify the physical location of feeder trunks and

 

BC field: Enter T1, E1, V, X, or other valid voice or

lines, you must make the feeder node explicit by having it

 

appear in the Sites table.

 

data back cards.

 

 

 

Fdr BC field: Leave blank or enter line interface for

In the Bursty Traffic table, verify that the connection

 

originates or terminates on the IPX feeder as a Frame Relay

 

access feeder such as Port Concentrator, MC3810, or

 

connection.

 

FastPAD.

 

 

 

 

 

MGX 8220 Feeders:

Bursty Traffic table

MGX 8220 edge concentrators are provisioned from the BC

General Instructions

Site field: Enter the site name. Must be BPX site.

and Fdr BC fields in the Bursty Traffic table. If the back card

 

specified can support MGX 8220, and the feeder back card

 

Type field: any from the list of choices.

 

can support the traffic type with an MGX 8220 service

 

 

 

BC (Back Card) field: Enter the back card that

module, NMT will provision an MGX 8220 edge

 

connects the BPX to the BNM card on the MGX 8220

concentrators.

 

edge concentrator.

The Fdr BC field determines the connection interface to the

 

 

 

Fdr BC (Feeder Back Card) field: Enter the customer

MGX 8220 feeder. The NMT determines the front card

 

interface on the MGX 8220 service module.

(FRSM, AUSM or CESM), based on the feeder back card

 

 

selected. If T3 is selected as the feeder back card, the NMT

 

 

assigns as SRM-3T3 service module.

 

 

If connection type implies AUSM card, the PCR value

 

 

determines the port speed and whether more than one T1/E1

 

 

is required.

 

 

 

 

 

Cisco WAN Modeling Tools Guide

 

 

 

 

 

 

OL-10426-01, Rev. A0

 

 

4-33

 

 

 

 

 

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Cisco Systems OL-10426-01 manual Tiered Network Configurations with Implicit Feeders, IPX/IGX Feeders Sites table
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