Cabletron Systems 9A426-01, Руководство пользователя

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Introduction
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Conversely, canonical frames destined for the FNB bus on the SmartSwitch 9000
backplane are converted into FDDI packets via the 9A426-01 Module’s FDDI
Network Interface Block (FNIB), and then forwarded onto the FNB.
Canonical frames destined for the INB bus on the SmartSwitch 9000 backplane are
converted into fixed length data packets via the 9A426-01 Module’s INB Network
Interface Block (INB NIB), and then forwarded onto the INB.
Features
Processor
The 9A426-01 Module is equipped with an advanced Intel i960 microprocessor.
This microprocessor provides a platform for all management functions within a
scalable RISC-based architecture.
SmartSwitch Core
The 9A426-01 Module incorporates the SmartSwitch Core, a collection of custom
Application Specific Integrated Circuits (ASICs) designed specifically for high
speed switching. The SmartSwitch ASIC bus is 64 bits wide with a bandwidth of
640 Mbps. Since all frame translation, address lookups, and forwarding decisions
are performed in hardware, the 9A426-01 Module can obtain a throughput
performance of greater than 750K pps.
Management
The 9A426-01 Module has one full implementation of SMT (Version 7.3) and
SNMP for local and remote management. Local management is provided through
the RS-232 COM ports on the SmartSwitch 9000 Environmental Module using a
standard VT-220™ terminal or emulator, or via telnet. Remote management is
achieved through Cabletron’s SPECTRUM or any SNMP-compliant management
tool. Switching statistics of the selected FNB interface include frames filtered,
frames forwarded, and all Spanning Tree Protocol parameters.
Connectivity
The 9A426-01 Module is designed to accept two standard Cabletron ATM Port
Interface Modules (APIMs). However, only one APIM can be active at one time (a
second APIM becomes active whenever the first APIM becomes inactive). Thus,
the second APIM is not necessary, but can be installed if physical layer
redundancy is desired. This redundancy protects against loss of data due to cable
failure, ATM Switch failure or APIM failure. If two APIMs are installed in the
9A426-01 Module, the second APIM does not have to be the same as the first
APIM. For example, you can place an APIM-21 (multimode fiber) in one APIM
port, and an APIM-29 (single mode fiber) in the module’s second APIM port.
Cabletron APIMs are designed to accept a variety of cable types including: single
mode fiber, multimode fiber, twisted-pair, and coaxial.