Cisco Systems 17053 appendix Catalyst 2950 and 3550 Switches

Page 17

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.

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

Cisco Bug ID

Resolved In

Description

 

 

 

The Catalyst 3550−24PWR

 

 

inline power interfaces do not

CSCdz44520

 

link up to certain 10/100/1000

 

interfaces configured as

( registered

 

 

auto/auto. To connect the

customers only)

 

12.1(13)EA1

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

 

The link to certain NICs fails to

( registered

 

 

come up when the switch port is

customers only)

 

12.1(13)EA1

hardcoded to 100 Mbps,

 

 

 

full−duplex or 100 Mbps,

 

 

half−duplex.

CSCdy72718

 

 

( registered

 

The switch port does not receive

customers only)

12.1(13)EA1

packets if the port is hardcoded

 

to a speed of 100, however it

 

 

 

 

 

transmits properly.

 

 

If a 10/100 port on the Catalyst

 

 

3550−24PWR switch is

CSCea36322

 

connected to a Gigabit Ethernet

( registered

 

NIC, with the speed/duplex

customers only)

12.1(14)EA1

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.

 

 

 

Image 17
Contents Prerequisites IntroductionDocument ID RequirementsBackground Information General Troubleshooting for 10/100/1000 Mbps NICsAutonegotiation Valid Configuration Duplex Configuration2Mismatch Correct∙ show port modDport Verifying Physical Connection and Link∙ show interfaces type Verifying Switch Port ConfigurationMaintaining Link Link Up/Down Situations Performance Notes Understanding Data Link Errors∙ Adjust switch jitter tolerance FCS Explanation of CatOS show port Command CountersPossible Causes for Incrementing CatOS Counters Explanation of CatOS show mac Command Counters Sniffer Trace Gigabit Autonegotiation Configuration Table Additional Troubleshooting for 1000BASE−X NICsTeaming of Network Interface Cards Gigabit Autonegotiation No Link to Connected DeviceCatalyst 8510 and 8540 CSR Catalyst 6000 and 6500 SwitchesSet port enable Catalyst 5000 and 5500 SwitchesCatalyst 4000, 2948G, and 2980G Switches Day to once a month. This issue can Catalyst 2950 and 3550 Switches NIC NIC Compatibility and Operation IssuesPage LnkChk to enable. 33921641.2241835 Hardware Panel SystemDevice ManagerPage R2BE/RBE/CBE Physical Interface PHY Control Register Programmable Options Appendix B Understanding How Autonegotiation Works= loopback mode switched on Related Information Networking Professionals Connection Featured Conversations

17053 specifications

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