3Com SuperStack II 32x, Installation Manual

Page: 52 / 76

4-4 C
HAPTER
4: T
ROUBLESHOOTING
Troubleshooting
the Token Ring
Connection
This section is not applicable to model 320. Table 4-4 summarizes
problems that can occur with a token ring connection and what action
you can take.
Table 4-4 Troubleshooting the Token Ring Connection (Models 327 and 527 only)
Symptom Cause and Action
The LAN LEDs are doing the following:
■
16 MB LED is blinking slowly
(turning on then off at
approximately 15 second intervals).
■
The Fault LED is on.
The following are possible problems indicated by the LED indicators:
Cable connection problem
The LAN cable may be improperly connected. Verify that the LAN
cable is properly connected at both ends. Check the wall plate if used
and the multistation access unit (MAU) of the central wiring center.
Bad cable
You may be cabling your STP or UTP connector with a faulty or
improperly wired cable. Swap the cable for another cable that is
known to work.
Bad concentrator port
The port or port connector of the MAU may be defective. Move the
station’s cable to another MAU port that is known to work.
Heavy network traffic
The Activity LED may remain off longer than expected. Wait for
network traffic to subside.
Insertion at the wrong speed
The system may have attempted to enter the token ring network at
the wrong speed. Check the setting of the ring speed for path 1.
Boundary Router users may use the System Configuration menu to
set the token ring speed. Full router users use SHow !1 -PATH BAud.
Also, check the path to make sure that it is enabled (SHow !1 -PATH
CONTrol).
Duplicate node address
Check to make sure that the MAC address of the system on your
network is unique.
Token ring experiencing network error recovery
The Activity LED may remain off longer than expected. Wait for
normal token ring operation after an automatic error recovery.
If none of these actions solves your problem, contact your network
supplier.
(continued)
SS2TRHWBook Page 4 Monday, May 5, 1997 3:11 PM