Server A and Server B both are connected with Switch1. Both the servers are running with 100 Mbps Full Duplex and both the switch ports are configured with Auto. But the server A connected port showin as 100 MB Half Duplex. Because of this I am getting slow connectivity and the interface Output error also increasing gradually.
Yes, you are correct. But the problem is the connectivity to this server was fine before this. Suddenly the connection speed gone down. When I chekced the switch I foudn its working on a-Half a-100. How it will happen automatically.
I've seen this issue in the past. Having the Server NICs and Cisco Switchports set to Auto/Auto is desirable and if the Server NIC is working to standard, it should negotiate to it's best capability (i.e. 100/Full).
When Auto/Auto negeotiates to "half" duplex on the switch side, it typically means that either the Server NIC has it's speed/duplex hard set or that the NIC is not working correctly.
I might suggest that you contact the Server NIC manufacturer, or browse their tech-support web site and check out any known issues.
Bad cabling can also cause the downshift to slower speed or half duplex.
Most often it's a "split pair pins 3&6" because someone didn't follow the correct pair order (per EIA/TIA 568a or b).
The split pair causes significant crosstalk and the NIC and / or port will downshift to 10BASE-T ... occasionally 100Half ... in half duplex, since only one side is talking at a time, the split pair is less of an issue.
Have you tried another cable? Output errors generally indicate congestion ... which can be a swamped device upstream, or a crappy cable killing the signal / dropping frames and boosting re-transmissions (reenforcing the congestion).
Late collisions are also frequently cabling related.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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