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4.2.2.4 1 nnn - Ethernet Heartbeat Error -
Problem
The transceiver is a non-DIGITAL transceiver that was made to con-
form to the Ethernet Version 1.0 specification. Some manufacturers
transceivers conform to the earlier Ethernet specification which did
not include the heartbeat signal. All DIGITAL transceivers conform
to Version 2.0 and supply this signal.
Correction: If you are using a non-DIGITAL transceiver, you should
disable the server's heartbeat detection action by defining the server
characteristic, HEARTBEAT, as DISABLED. Enter the DEFINE
SERVER HEARTBEAT DISABLED command (see Chapter 5,
MUXserver 100 COMMAND DESCRIPTIONS). Reinitialize the
server to make this change operational.
NOTE
The steady green light and error message status Innn still appear
even with HEARTBEAT disabled. However, the server will func-
tion normally.
Problem
There is a transceiver fault or a cabling problem.
Correction: Refer to Section 4.2.2.3, nlnn - Ethernet Loopback
Error.
4.2.3 No Supervisor Port Messages
The Supervisor terminal has no display when the server initializes.
Problem
The supervisor terminal is faulty.
Correction: Refer to Section 4.4, PROBLEMS AFFECTING
INDIVIDUAL PORTS, for troubleshooting steps for problems that
affect individual ports.
Problem
The supervisor terminal's characteristics are not set up correctly.
Correction: Refer to Section 4.4 for troubleshooting steps for prob-
lems that affect individual ports.
NOTE
For server installation, the supervisor port terminal must be confi-
gured to operate with a speed of 9600 bps and a character size of
eight bits with no parity. Following installation, you can use the
DEFINE PORT command to set up the console terminal with
other values for speed, character size and parity.
12
CHAPTER 4 MUXserver 100 TROUBLESHOOTING
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