Enterasys mrxi-22 ユーザーガイド
INTRODUCTION
1-3
The MRXI fully conforms to the IEEE 802.3 Repeater, AUI, and
10BASE-T specifications, and provides the flexibility to connect
networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment. A
Repeater Interface Controller (RIC) in the MRXI provides full 802.3
repeater capabilities integrated into a single chip. The MRXI transmits
re-timed data packets, regenerates the preamble, extends fragments, and
arbitrates collisions.
10BASE-T specifications, and provides the flexibility to connect
networks using IEEE 802.3, Ethernet Version 1 or Version 2 equipment. A
Repeater Interface Controller (RIC) in the MRXI provides full 802.3
repeater capabilities integrated into a single chip. The MRXI transmits
re-timed data packets, regenerates the preamble, extends fragments, and
arbitrates collisions.
The MRXI automatically partitions problem segments, and reconnects
non-problem segments to the network. This feature minimizes the impact
on network operation resulting from a problem on one segment by
isolating the problem segment. Only devices on the problem segment are
affected. When the problem is solved, the MRXI automatically reconnects
the isolated segment to the network.
non-problem segments to the network. This feature minimizes the impact
on network operation resulting from a problem on one segment by
isolating the problem segment. Only devices on the problem segment are
affected. When the problem is solved, the MRXI automatically reconnects
the isolated segment to the network.
Since the MRXI utilizes polarity detection and correction, the twisted pair
connections are not sensitive to signal polarity. The network will still
function properly with the (+) and (–) lines within a pair reversed.
Operating in this condition is not recommended and if this condition is
discovered, the segment should be removed from the network and wired
correctly by a technician. This reduces the potential for problems in the
future if equipment changes are made. Connector pinouts are provided in
Chapter 2,
connections are not sensitive to signal polarity. The network will still
function properly with the (+) and (–) lines within a pair reversed.
Operating in this condition is not recommended and if this condition is
discovered, the segment should be removed from the network and wired
correctly by a technician. This reduces the potential for problems in the
future if equipment changes are made. Connector pinouts are provided in
Chapter 2,
Installation Requirements / Specifications
.
You can configure the two front panel serial ports to support an SNMP
proxy for Uninterruptible Power Supplies (UPS) or the Serial Line
Internet Protocol (SLIP). MIB II and RMON support are built into the
MRXI for network analyzer functionality. In addition, Cabletron’s
Distributed LAN Monitor (DLM), a software option for the MRXI,
provides a method for locally polling and monitoring devices on a LAN to
minimize network management traffic on an enterprise, campus, or wide
area network.
proxy for Uninterruptible Power Supplies (UPS) or the Serial Line
Internet Protocol (SLIP). MIB II and RMON support are built into the
MRXI for network analyzer functionality. In addition, Cabletron’s
Distributed LAN Monitor (DLM), a software option for the MRXI,
provides a method for locally polling and monitoring devices on a LAN to
minimize network management traffic on an enterprise, campus, or wide
area network.
The MRXI uses Flash EEPROMs that allow you to download new and
updated firmware using Cabletron Systems Remote
LANVIEW/Windows, version 2.3 or later or any device using BOOTP or
TFTP protocols.
updated firmware using Cabletron Systems Remote
LANVIEW/Windows, version 2.3 or later or any device using BOOTP or
TFTP protocols.
The front panel of the MRXI also has a reset switch to initialize the
processor.
processor.