Cabletron Systems MMAC-Plus 9A128-01 Manuale di programmazione

9032070

MMAC-Plus

9A128-01/9A129-01

ATM Module

Local Management Appendix

Appendix

9A128-01 and 9A129-01

Module Speciﬁc Information

Introduction

This appendix contains local management information that is speciﬁc to the

following ATM Modules:

• 9A128-01 (1 Port, Multimode Fiber, SC Connector)

• 9A129-01 (1 Port, Single-Mode Fiber, SC Connector)

Module Interfaces

The 9A128-01 and 9A129-01 ATM Modules have four interfaces. Table 1 lists the

identifying number, name, and description of each interface.

Use the numbers listed in Table 1 to conﬁgure the module’s default interface (see

the General Conﬁguration Screen).

Table 1. 9A128-01/9A129-01 ATM Module Interfaces

Interface

Number

Interface

Name

Interface

Description

1 SMB-1 1 Mbps System Management Bus

2 SMB-10 10 Mbps System Management Bus

3 FNB Flexible Network Bus

4 ATM ATM (module front panel)

9A128-01 and 9A129-01 Module Speciﬁc Information

FNB Resource Conﬁguration Codes

The 9A128-01 and 9A129-01 ATM Modules provide connectivity between two

interfaces: the front panel interface and one of the FDDI rings on the backplane

(FNB-1 or FNB-2).

The FNB Resource Conﬁguration Screen allows you to connect the module’s front

panel interface to one of the chassis’ two FDDI networks (FNB-1 or FNB-2) via a

bridge/router.

The FNB Resource Conﬁguration Screen lists all the possible connections that the

module can support on the FNB, displays the current connection, and allows you

to change the connection. Table 2 lists and describes the FDDI connections from

which you can select.

Table 2. 9A128-01/9A129-01 ATM Module FNB Resource Conﬁguration Codes

Conﬁguration

ID FDDI Connections Description

1 No FDDI Connections

The FNB-1 and the FNB-2 on the

chassis’ backplane are not

connected to the module’s

bridge/router.

2 FNB-1

The FNB-1 on the backplane is

connected to the module’s

bridge/router.

3 FNB-2

The FNB-2 on the backplane is

connected to the module’s

bridge/router.

9A128-01 and 9A129-01 Module Speciﬁc Information

Virtual Channels andVirtual Paths

Rather than addressing cells to a speciﬁc destination, as in a LAN, ATM addresses

cells to Virtual Channels (VCs) and/or Virtual Paths (VPs). This addressing takes

place in the header ﬁeld of the ATM cell.

VCs and VPs are bi-directional (i.e., they transfer information in both directions

on a single channel or path), and are “set up” between devices on the ATM

network prior to transmission. Similar to WAN transmission, ATM technology

provides the ability to send several VCs together over a VP, and several VPs over

an ATM link segment.

Permanent and SwitchedVirtual Channels

ATM networks use two different types of Virtual Channels – Permanent Virtual

Channels (PVCs) and Switched Virtual Channels (SVCs). The difference between

PVCs and SVCs exists in the channel setup.

PVCs are pre-conﬁgured by an administration function, and are usually

established for long term use. After setting up this channel, nothing else is

required by the network to transfer information between the two established

points. This type of virtual channelling is established through a local or remote

management interface.

SVCs use a signaling and network switching procedure to set up dynamically. In

other words, SVCs are established “on the ﬂy,” as needed for a particular service,

used to transmit on the short term, and then terminated.

9A128-01 and 9A129-01 Module Speciﬁc Information

ATM Connection Setup Screen

The ATM Connection Setup Screen (Figure 1), displays the module’s Permanent

Virtual Channels (PVCs) and Switched Virtual Channels (SVCs). You can add or

delete PVCs.

Figure 1. ATM Connection Setup Screen

MMAC-Plus LOCAL MANAGEMENT

ATM CONNECTION SETUP

Module Name: 9A128-01 Firmware Revision: 02.10.13

Slot Number: 5 BOOTPROM Revision: 01.01.08

ATM Port 4 Current Connections: 11

VPI VCI Encapsulation Type AAL Type Oper. Status

0 0005 Other 5 Enabled

0 0016 Other 5 Enabled

0 0033 Other 5 Enabled

0 0034 VC Mux 802.3 LANE 5 Enabled

0 0041 VC Mux 802.3 LANE 5 Enabled

PORT: 4PREVIOUS NEXT ADD/DELETE RETURN

The screens shown in this appendix are for the 9A128-01 ATM Module. These

screens also apply to the 9A129-01 ATM Module.

NOTE

9A128-01 and 9A129-01 Module Speciﬁc Information

ATM Connection Setup Screen Fields

The following information brieﬂy explains each ATM Connection Setup Screen

ﬁeld.

ATM Port

Displays the MIB II interface number. Valid values are 4 through 67.

Current Connections

Displays the number of connections (PVCs and SVCs) conﬁgured to the module.

VPI

Displays the Virtual Path Identiﬁer (VPI) of each connection. You assign VPIs in

the Add/Delete Entry screen.

VCI

Displays the Virtual Channel Identiﬁer (VCI) of each connection. You assign VCIs

in the Add/Delete Entry screen.

EncapsulationType

Displays the method used to encapsulate data at the ATM Adaptation Layer 5

(AAL-5) for each connection. The 9A128-01/9A129-01 module supports the

following methods of encapsulation:

•

VC Mux 802.3 LANE (default)

VC Based Multiplexed 802.3 LAN Emulation. This method is speciﬁed by the

ATM Forum LAN Emulation speciﬁcation.

•

VC Mux Bridged 802.3

VC Based Multiplexing for bridged protocols as deﬁned by the IETF

RFC 1483.

•

LLC Encapsulation

Logical Link Control for Bridged Protocols as deﬁned by the IETF RFC 1483.

AALType

Displays the ATM Adaptation Layer (AAL) type of each connection. The AAL

divides the user information into segments suitable for packaging into series of

ATM cells. The ATM Forum’s LAN Emulation speciﬁcation dictates that AAL-5

be used for all LAN emulation trafﬁc. The 9A128-01/9A129-01 module supports:

• AAL-3/4

• AAL-5 (

default

)

9A128-01 and 9A129-01 Module Speciﬁc Information

Oper. Status

Displays the operational status of each connection. Valid values are:

• Enabled (

default

)

• Disabled

Displaying Information About Another Port

To display information about another port (change the MIB II interface number):

1. Use the arrow keys to highlight the

PORT:

ﬁeld (lower left corner of screen).

2. Press the

Space

Bar

to increment (press the

Backspace

key to decrement) the

port number.

Viewing Previous/Next Channels

To view the previous/next series of channels in the ATM Connection Setup

Screen:

1. Use the arrow keys to highlight

then press the

Return

key.

Displaying the Add/Delete Entry Screen

To display the Add/Delete Entry Screen:

1. Use the arrow keys to highlight

ADD/DELETE

, then press the

Return

key.

Exiting the ATM Connection Setup Screen

To exit the ATM Connection Setup Screen:

1. Use the arrow keys to highlight

RETURN

, then press the

Return

key.

9A128-01 and 9A129-01 Module Speciﬁc Information

ATM Connection Add/Delete Entry Screen

The ATM Connection Add/Delete Entry Screen (Figure 2), is used to add or

delete a PVC on the module.

Figure 2. ATM Connection Add/Delete Entry Screen

MMAC-Plus LOCAL MANAGEMENT

ATM CONNECTION ADD/DELETE ENTRY

Module Name: 9A128-01 Firmware Revision: 02.10.13

Slot Number: 5 BOOTPROM Revision: 01.01.08

Port VPI VCI AAL Type Encapsulation Type

4 0 0000 [5] [VC Mux Bridged 802.3]

ADD/MODIFY RETURN

9A128-01 and 9A129-01 Module Speciﬁc Information

ATM Connection Add/Delete Entry Screen Fields

The following information brieﬂy explains each ATM Connection Add/Delete

Entry Screen ﬁeld.

Port

The MIB II interface that the PVC is being created on.

VPI

Use this ﬁeld to enter the VPI of the PVC you want to add, delete, or modify. The

acceptable value for this ﬁeld is 0.

VCI

Use this ﬁeld to enter the VCI of the PVC you want to add, delete, or modify. This

ﬁeld allows values of 0–1023.

AALType (Toggle)

Use this ﬁeld to select the ATM Adaptation Layer for the PVC you want to add,

delete, or modify. Press the

Space

Bar

to toggle the selections, which are:

• AAL-3/4

• AAL-5 (

default

)

EncapsulationType (Toggle)

Use this ﬁeld to select the data encapsulation type used over AAL-5. Press the

Space

Bar

to select one of the following:

•

VC Mux Bridged 802.3

VC Based Multiplexing for bridged protocols as deﬁned by the IETF

RFC 1483.

•

LLC Encapsulation

Logical Link Control for Bridged Protocols as deﬁned by the IETF RFC 1483.

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