Skip to content
Skip to footer
Cisco.com Worldwide
MENU
CLOSE
Products
Support
Partners
More
Search
Log In
Log Out
Choose Language Selection
us
en
More
Log In
Log Out
Log In
Have an account?
Personalized content
Your products and support
Log In
Forgot your user ID and/or password?
Manage account
Need an account?
Create an account
Help
Choose Language Selection
us
en
Choose Language Selection
Products
Support
Training & Events
Buy
Partners
Support
Technology Support
LAN Switching
Ethernet
Troubleshooting TechNotes
View Documents by Topic
Choose a Topic
Gigabit Ethernet (802.3z)
Gigabit Ethernet (802.3z)
System Requirements to Implement Gigabit Ethernet on Catalyst Switches
UniDirectional Link Detection (UDLD)
Nexus 9000 TCAM values set to 0 dropping Arp, UDLD, LACP packets
Best Practices for Catalyst 4500/4000, 5500/5000, and 6500/6000 Series Switches Running CatOS Configuration and Management
29/Nov/2007
Resilient Ethernet Protocol Overview
22/Jul/2016
Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues
27/Oct/2009
Troubleshooting Switch Port and Interface Problems
03/Apr/2009
Configuring and Troubleshooting Ethernet 10/100/1000Mb Half/Full Duplex Auto-Negotiation
11/Feb/2019
Errdisable Port State Recovery on the Cisco IOS Platforms
23/Mar/2016
Overview of Keepalive Mechanisms on Cisco IOS
17/Dec/2014
Recovering From errDisable Port State on the CatOS Platforms
20/Jun/2007
Signal Quality Errors (SQE)
15/Nov/2005
Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues
27/Oct/2009
Troubleshooting Cisco Catalyst Switches to NIC Compatibility Issues
(PDF - 184 KB)
05/Jan/2017
Troubleshooting Switch Port and Interface Problems
03/Apr/2009
Support Documentation
All Support Documentation for this Series