HP 6120XG ProCurve Series 6120 Blade Switches Management and Configuration Gui - Page 532

Troubleshooting Unusual Network Activity Global RADIUS Encryption Key Unique RADIUS Encryption Key for the RADIUS server at 10.33.18.119 Figure C-2. Displaying Encryption Keys Also, ensure that the switch port used to access the RADIUS server is not blocked by an 802.1X configuration on that port. For example, show portaccess authenticator < port-list > gives you the status for the specified ports. Also, ensure that other factors, such as port security or any 802.1X configura­ tion on the RADIUS server are not blocking the link. The authorized MAC address on a port that is configured for both 802.1X and port security either changes or is re-acquired after execution of aaa port-access authenticator < port-list > initialize. If the port is force-authorized with aaa port-access authenticator control authorized command and port security is enabled on the port, then executing initialize causes the port to clear the learned address and learn a new address from the first packet it receives after you execute initialize. A trunked port configured for 802.1X is blocked. If you are using RADIUS authentication and the RADIUS server specifies a VLAN for the port, the switch allows authentication, but blocks the port. To eliminate this problem, either remove the port from the trunk or reconfigure the RADIUS server to avoid specifying a VLAN. QoS-Related Problems Loss of communication when using VLAN-tagged traffic. If you cannot communicate with a device in a tagged VLAN environment, ensure that the device either supports VLAN tagged traffic or is connected to a VLAN port that is configured as Untagged. C-14