HP ProCurve 6120G/XG Configuration Manual page 20

Procurve series 6120 blade switches management and configuration guide
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C Troubleshooting
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Troubleshooting Approaches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Browser or Telnet Access Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . C-7
Unusual Network Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
Using the Event Log for Troubleshooting Switch Problems . . . . C-24
Debug/Syslog Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-37
xviii
General Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
802.1Q Prioritization Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
IGMP-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
LACP-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-11
Port-Based Access Control (802.1X)-Related Problems . . . . . . . . . C-11
QoS-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-14
Radius-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-15
Spanning-Tree Protocol (MSTP) and Fast-Uplink Problems . . . . . . C-16
SSH-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-17
TACACS-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-19
TimeP, SNTP, or Gateway Problems . . . . . . . . . . . . . . . . . . . . . . . . . C-21
VLAN-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-21
Event Log Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-24
Menu: Displaying and Navigating in the Event Log . . . . . . . . . . . . . C-31
CLI: Displaying the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-32
CLI: Clearing Event Log Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-32
CLI: Turning Event Numbering On . . . . . . . . . . . . . . . . . . . . . . . . . . . C-33
Using Log Throttling to Reduce Duplicate
Event Log and SNMP Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-33
Log Throttle Periods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-34
Example of Log Throttling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-34
Example of Event Counter Operation . . . . . . . . . . . . . . . . . . . . . C-36
Debug/Syslog Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-37
Debug/Syslog Destination Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . C-37
Debug/Syslog Configuration Commands . . . . . . . . . . . . . . . . . . . . . . C-38
Configuring Debug/Syslog Operation . . . . . . . . . . . . . . . . . . . . . . . . . C-39

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