N e t w o r k O p e r a t i o n a l P r o b l e m s
C h a p t e r 1 1 : T r o u b l e s h o o t i n g
❖
11-5
There are intermittent
breaks in transmission.
A network cable is damaged.
A damaged cable may still be capable of
intermittent throughput, with occasional
breaks in transmission. It is difficult to detect
if no external cable damage is visible.
Try to disassemble and test each section
separately until the bad cable or connectors
are found. Replace cable or connectors
immediately.
The maximum cable length is
exceeded.
Check cable length specifications for your
network.
Ethernet networks
have limitations on the
maximum cable length for each network
segment. Exceeding these limitations can
cause problems such as ghosting
(intermittent appearance and disappearance
of network services or devices).
Following are the recommended maximum
allowable cable lengths:
ThinNet (10Base2, uses RG-58/U coaxial
cable with T connectors to attached
devices, and two 50 ohm terminators,
one at each end of the bus.)
A maximum of 185 meters (607 feet)
and 30 attachments per segment.
10BaseT (10Base-T uses 24 gauge,
unshielded twisted pair cables with
RJ-45 connectors. The cables run from
attached printers to a central hub.)
100 meters (330 feet) per cable.
Token Ring networks
have limitations on
the maximum cable length for each network
segment. Exceeding these limitations can
cause problems such as ghosting
(Intermittent appearance or disappearance
of network services or devices.)
Table 11.1 Network Operational Problems
(continued)
Problem
Possible Causes
Corrective Actions
ETR-CH11 Page 5 Thursday, October 24, 1996 7:14 AM
