Cabletron Systems MMAC-Plus 9A128-01 Programming manual

9032070
MMAC-Plus
®
9A128-01/9A129-01
ATM Module
Local Management Appendix

1
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
2
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.

3
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
4
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

5
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
6
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 PREVIOUS or NEXT , 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.

7
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
8
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.