Introduction 1-5
MGX 8220 Management
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Service Resource Module (SRM-T1E1)
This card provides loopback and bit error rate testing (BERT) functions and 1:N redundancy for
the service modules.
The ASC and the BNM modules must be present in an MGX 8220 shelf and are referred to as the
core modules.
T
he MGX 8220 shelf release 3.0 supports redundant core modules where one
ASC/BNM set is an active set and a second ASC/BNM is a standby set. In the event of a malfunction,
the standby set automatically takes over as the active set. The SRM is optional. If present, it is part
of the core card set, with switchover to the standby upon a malfunction of the active BNM or ASC.
MGX 8220 Management
The functions and operation of the MGX 8220 shelf are achieved through downloaded firmware. The
firmware controls the overall operation of the shelf and responds to configuration and other
commands received from a user terminal or workstation. The MGX 8220 shelf has a command
repertoire of over 60 user commands which are used to configure and display the various operational
parameters of the shelf.
The current status and configuration parameters of the MGX 8220 modules are maintained in a
Management Information Base (MIB) which is updated by the firmware as changes in status and
configuration occur. The MIB can be interrogated using SNMP commands.
Most of the functions of the MGX 8220 shelf Release 3.0 can be effected through the graphical user
interface provided in StrataView Plus 8.2.
The ASC module includes three ports for user input of management commands. A further means of
management access is provided in-band over the ATM trunk.
The maintenance port is a simple RS-232 port for direct connection to an alpha-numeric terminal
into which the user can type commands through a Command Line Interface (CLI).
The
control port
(SLIP protocol only), the LAN (Ethernet) port and the In-band ATM connection all
support the CLI (via Telnet), TFTP and SNMP protocols for communicating with the MGX 8220
shelf.
New in Release 3.0
This section provides a very brief description of the new MGX 8220 shelf features that have been
added since Release 2.x.
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A new Broadband Network Module is available which supports E3 trunking to the BPX switch.
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The new Circuit Emulation Service Modules (CESM) provide support for unstructured
synchronous data streams on both T1 and E1 lines.
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The Frame Service Module (FRSM) adds support for frame forwarding on a port-by-port basis.
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The ATM UNI Service Module (AUSM) now supports a number of new features including SRM
BERT support, enhanced CAC (Connection Admission Control), and Virtual Path Connection
capability.
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The optional SRM (Service Resource Module) which provides for loopback and BERT testing
of lines and ports now provides 1:N redundancy for service modules as a feature license.
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The new Inverse Multiplexing for ATM Trunk Module 0- (IMATM) permits BPX nodes to use
multiple (up to 8) T1 or E1 lines as ATM trunks instead of a single T3 or E3 line. This card is
housed in the MGX 8220 shelf but acts as an extension to the BPX BNI card.
