Web: Configuring Port Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . B-28
Locating a Device
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-28
C Troubleshooting
Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Troubleshooting Approaches
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5
Browser or Telnet Access Problems
. . . . . . . . . . . . . . . . . . . . . . . . . . . C-6
Unusual Network Activity
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
General Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
802.1Q Prioritization Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
IGMP-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9
LACP-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10
Port-Based Access Control (802.1X)-Related Problems . . . . . . . . . C-10
QoS-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-13
Radius-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-14
Spanning-Tree Protocol (MSTP) and Fast-Uplink Problems . . . . . . C-15
SSH-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-16
TACACS-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-17
TimeP, SNTP, or Gateway Problems . . . . . . . . . . . . . . . . . . . . . . . . . C-19
VLAN-Related Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-19
Fan Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-21
Using the Event Log for Troubleshooting Switch Problems
. . . . C-22
Event Log Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-22
Menu: Displaying and Navigating in the Event Log . . . . . . . . . . . . . C-28
CLI: Displaying the Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-29
CLI: Clearing Event Log Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-29
CLI: Turning Event Numbering On . . . . . . . . . . . . . . . . . . . . . . . . . . . C-30
Using Log Throttling to Reduce Duplicate
Event Log and SNMP Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-30
Log Throttle Periods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-31
Example of Event Counter Operation . . . . . . . . . . . . . . . . . . . . . C-31
Debug/Syslog Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-32
Debug/Syslog Messaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-32
xvi
Summary of Contents for PROCURVE 2520
Page 2: ......
Page 3: ...HP ProCurve 2520 Switches November 2009 S 14 03 Management and Configuration Guide ...
Page 60: ...Using the Menu Interface Where To Go From Here 3 16 ...
Page 82: ...Using the Command Line Interface CLI CLI Editing Shortcuts 4 22 ...
Page 146: ...Switch Memory and Configuration Automatic Configuration Update with DHCP Option 66 6 40 ...
Page 164: ...Interface Access and System Information System Information 7 18 ...
Page 292: ...Port Trunking Outbound Traffic Distribution Across Trunked Links 12 30 ...
Page 374: ...Configuring for Network Management Applications LLDP Link Layer Discovery Protocol 13 82 ...
Page 434: ...Monitoring and Analyzing Switch Operation Locating a Device B 30 ...
Page 514: ...Troubleshooting DNS Resolver C 80 ...
Page 524: ...Daylight Savings Time on ProCurve Switches E 4 ...
Page 542: ...16 Index ...
Page 543: ......