Troubleshooting Guide

For detailed information on Cisco bug IDs, refer to the Bug Toolkit (registered customers only) .
Refer to Catalyst 4500 Series Release Notes for more Catalyst 2948G, 2980G, and 4000 documented bug
fixes.
Catalyst 2950 and 3550 Switches
This table lists several known issues found on the Catalyst 2950 and 3550 switches.
Table 10
For detailed information on Cisco bug IDs, refer to the Bug Toolkit
(registered customers only) .
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
linecard are affected regardless
of the slot in which the linecard
is installed. The workaround is
to reset the switch.
CSCds89148
(registered
customers
only)
5.5.6,
6.2.1
Xmit-Err counter increments on
unconnected ports for
unexplained reasons. The bug
also resolves an issue of high-
CPU utilization conditions that
can be caused by unconnected
ports that are configured as host
ports.
Cisco Bug ID
Resolved
In
Description
CSCdz44520
(registered
customers
only)
12.1(13)
EA1
The Catalyst 3550-24PWR
inline power interfaces do not
link up to certain 10/100/1000
interfaces configured as
auto/auto. To connect the
Catalyst 3550-24PWR inline
power interfaces to a
10/100/1000 interface
configured as auto/auto on a
Catalyst 3550-12G or 3550-12T
does not work.
CSCdz32789
(registered
customers
only)
12.1(13)
EA1
The link to certain NICs fails to
come up when the switch port
is hardcoded to 100 Mbps, full-
duplex or 100 Mbps, half-
duplex.
CSCdy72718
(registered
customers
only)
12.1(13)
EA1
The switch port does not
receive packets if the port is
hardcoded to a speed of 100,
however it transmits properly.
CSCea36322
(registered
customers
only)
12.1(14)
EA1
If a 10/100 port on the Catalyst
3550-24PWR switch is
connected to a Gigabit Ethernet
NIC, with the speed/duplex
setting set to auto, and the port
speed changed from 100 Mbps
to 10 Mbps, or from 10 Mbps to
100 Mbps, the link between the
port and the NIC can potentially
not come up.
NIC
Model/Manufacture
Symptom Description Resolution
Intermittently
Driver versions
earlier than
2.04 can