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OmniSwitch Troubleshooting Guide September 2005 page 18-1
18 Troubleshooting
Authenticated VLANs
In order to troubleshoot Authenticated VLAN (AVLAN), a basic understanding of how authentication
works in the switch is required. Understanding of Radius and DHCP server will be useful in troubleshoot-
ing Authenticated VLAN.
Note. Reading the “Managing Authentication Servers” and the “Configuring Authenticated VLANs”
chapters in the appropriate OmniSwitch Network Configuration Guide is highly recommended.
In This Chapter
“Introduction” on page 18-1
“Troubleshooting AVLAN” on page 18-2
“Useful Notes on Client Issues” on page 18-5
“Troubleshooting Using Debug Systrace” on page 18-5
“Dshell Troubleshooting” on page 18-12
Introduction
The main function of Authenticated VLAN is to control user access to network resources based on VLAN
assignment and user login process. This process is sometimes called user authentication or Layer 2
Authentication. The term Authenticated VLANs (AVLANs) and Layer 2 Authenticaion are synonymous.
Note. This document does not discuss the basic operation of the AVLAN. To learn about how AVLAN
works, refer to the “Managing Authentication Servers” and the “Configuring Authenticated VLANs”
chapters in the appropriate OmniSwitch Network Configuration Guide.