Chapter 4 Configuration Tables and Fields

Obsolete Products

Networks with Access Feeders or Access Concentrators

IPX and IGX switches can include devices that do the following tasks:

•concentrate small connections into large ones

•convert normal voice or legacy data connections into Frame Relay connections.

The NMT supports three access feeders that concentrate or convert data: the MC3810, the FastPAD, and the Port Concentrator. One IGX or IPX node can support up to 64 of these devices. Using NMT to model connections that terminate on these access feeders is similar to modeling MGX 8220 feeders for a tiered network.

MC3810

The NMT supports the MC3810 configured as a feeder to an IGX switch. The MC3810 concentrates voice and data connections into Frame Relay connections. The NMT configures as many MC3810s as are required to support the traffic. The NMT generally sets the feeder trunk speed to the minimum speed that can carry the traffic.

The NMT designs MC3810s automatically when MC3810 connections are added to the Voice Traffic, Data Traffic, or Bursty Traffic table, and the model is based on switch software release versions 8.2.5 to 8.3.9, or 8.5.0 and above.

Refer to Table 4-21for information on modeling a network using the MC3810.

Table 4-21 MC3810 Configuration

 

Topic

Required Settings

Comments

 

 

 

 

 

 

Setting MC3810

Model Settings table

If the NMT default value (920) is

 

 

Release

Make sure that the value of Switch Software Release is set to the release that

used, NMT will automatically design

 

 

 

 

MC3810s for all feeder connections,

 

 

 

 

is to be modeled. If that value is one that defaults to MC3810 (825 to 839, or

 

 

 

 

except for voice connection types that

 

 

 

 

850 and above), NMT will design MC3810s for any non-voice feeder

 

 

 

 

are exclusively for FastPad.

 

 

 

 

connections. All other values default to FastPAD for non-voice feeder

 

 

 

 

 

 

 

 

 

 

 

connections.

 

 

 

 

 

 

 

 

Adding MC3810 data

Data Traffic table

Each MC3810 data connection must

 

 

connections

Type field: Enter the data traffic speed. If the speed exceeds 512 Kbps, do not

originate and terminate on a MC3810.

 

 

 

 

If the switch software release does not

 

 

 

 

use the Data Traffic table; use the Bursty Traffic table instead.

 

 

 

 

support the MC3810, NMT designs

 

 

 

 

BC (Back Card) field: For each end of the connection, enter the back card of

 

 

 

 

FastPADs.

 

 

 

 

the FTC/ FTM card that links the hub IPX/IGX switch to the MC3810 (T1,

 

 

 

 

The minimum speed for synch data is

 

 

 

 

E1, V, or X).

 

 

 

 

19.2 kbps. For legacy data like

 

 

 

 

Fdr BC (Feeder Back Card) field: Enter the connection interface on the line

 

 

 

 

HDLC, use the Bursty Traffic table.

 

 

 

 

side of the MC3810.

 

 

 

 

 

 

 

 

 

 

 

 

Adding MC3810

Voice Traffic table

MC3810 dedicated voice connections

 

 

dedicated voice

Type field: Enter C32, A32, G729, G729V, G729A, or G729AV. The types

can have one end at a MC3810 and

 

connections

the other at a CDP, CVM, or UVM

 

refer to compression algorithms; all G types are 8 kbps.

 

 

 

 

card at an IPX or IGX switch.

 

 

 

 

BC (Back Card) field: For the MC3810 end of the connection, enter the back

 

 

 

 

For each feeder back card entry, the

 

 

 

 

card of the FTC/FTM card that links the hub IPX/IGX switch to the MC3810

 

 

 

 

NMT establishes a dedicated virtual

 

 

 

 

(T1, E1, V, or X).

 

 

 

 

circuit that connects one voice port on

 

 

 

 

Fdr BC (Feeder Back Card) field: For each end of the connection having a

 

 

 

 

a MC3810 to one voice port on

 

 

 

 

MC3810, enter V for analog voice, or T1 or E1 for digital voice.

 

 

 

 

another MC3810 or on an IPX/IGX

 

 

 

 

 

 

 

 

 

 

switch.

 

 

 

 

 

 

 

 

 

 

 

Cisco WAN Modeling Tools Guide

 

 

 

 

 

 

 

 

 

 

4-36

 

 

 

OL-10426-01, Rev. A0

 

 

 

 

 

 

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Cisco Systems OL-10426-01 manual Networks with Access Feeders or Access Concentrators, 21 MC3810 Configuration
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