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NIC Compatibility and Operation Issues
Disclaimer: Use this table as a guide in order to troubleshoot NIC issues. Consult the NIC vendor for
verification and proper resolution of the issue.
Table 11
NIC
Model/Manufacture
Symptom Description Resolution
Apple Macintosh
G3
Intermittently loses
network services
when the built−in
Ethernet interface is
used.
Driver versions
earlier than 2.04 can
experience this issue.
Contact vendor
technical support for
more information.
Upgrade to driver version
2.04 or later.
Apple Macintosh,
Power Macintosh
G3, and Powerbook
G3
Unable to set speed
and duplex of
built−in Ethernet
interface manually.
Apple Speed/Duplex
tool is required to
manually set
speed/duplex of
Ethernet interface.
Download Apple
Speed/Duplex tool from
Apple support website.
Apple Macintosh
OS with Open
Transport 2.5.1 and
2.5.2
Unable to obtain
DHCP address from
DHCP server.
Upon bootup,
Macintosh can fail to
obtain IP address
from DHCP server.
See Apple technical
information library
article 25049.
Apple Macintosh
Built−In Ethernet
Unable to determine
hardware MAC
address.
In order to
troubleshoot network
connectivity issues,
host MAC address
can be required.
Contact vendor technical
support.
Apple Macintosh
Performance Issues
and NuBus
Built−in Ethernet
interfaces
outperform NuBus
Ethernet cards.
Concern of maximum
data transfer rate
possible with the
built−in Ethernet.
See Apple technical
information library
article 12000.
Apple Powerbook
G3/G4 with Internal
NIC
Slow performance
when large file
transfers are
performed.
Some NICs can
operate
out−of−specification,
as published in IEEE
802.3. Some
Catalysts are more
tolerant of
out−of−spec NICs
and do not notice any
performance
degradation.
Use of external or PC
card. Contact Apple
technical support.
Various Apple
G3/G4 Laptops and
Workstations with
Internal NICs
Slow performance.
Notable slow
performance.
Upgrade to latest NIC
driver and load Duplexer
utility. Verify
autonegotiation settings.