- Hewlett-Packard Switch User Manual
Table Of Contents
- HP ProCurve 2520 Switches Management and Configuration Guide
- Front Cover
- Title Page
- Copyright, Notices, & Publication Data
- Contents
- Feature Index
- 1.Getting Started
- 2.Selecting a Management Interface
- 3.Using the Menu Interface
- 4.Using the Command Line Interface (CLI)
- 5.Using the ProCurve Web Browser Interface
- 6.Switch Memory and Configuration
- 7.Interface Access and System Information
- 8.Configuring IP Addressing
- 9.Time Protocols
- 10.Port Status and Configuration
- Contents
- Overview
- Viewing Port Status and Configuring Port Parameters
- Menu: Port Status and Configuration
- CLI: Viewing Port Status and Configuring Port Parameters
- Customizing the Show Interfaces Command
- Viewing Port Utilization Statistics
- Viewing Transceiver Status
- Enabling or Disabling Ports and Configuring Port Mode
- Enabling or Disabling Flow Control
- Configuring a Broadcast Limit on the Switch
- Configuring ProCurve Auto-MDIX
- Web: Viewing Port Status and Configuring Port Parameters
- Using Friendly (Optional) Port Names
- 11.Power Over Ethernet (PoE) Operation
- 12.Port Trunking
- Contents
- Overview
- Port Trunk Features and Operation
- Trunk Configuration Methods
- Menu: Viewing and Configuring a Static Trunk Group
- CLI: Viewing and Configuring Port Trunk Groups
- Web: Viewing Existing Port Trunk Groups
- Trunk Group Operation Using LACP
- Trunk Group Operation Using the “Trunk” Option
- How the Switch Lists Trunk Data
- Outbound Traffic Distribution Across Trunked Links
- 13.Configuring for Network Management Applications
- Contents
- Using SNMP Tools To Manage the Switch
- LLDP (Link-Layer Discovery Protocol)
- Terminology
- General LLDP Operation
- Packet Boundaries in a Network Topology
- Configuration Options
- Options for Reading LLDP Information Collected by the Switch
- LLDP and LLDP-MED Standards Compatibility
- LLDP Operating Rules
- Configuring LLDP Operation
- LLDP-MED (Media-Endpoint-Discovery)
- Displaying Advertisement Data
- LLDP Operating Notes
- LLDP and CDP Data Management
- A.File Transfers
- B.Monitoring and Analyzing Switch Operation
- Contents
- Overview
- Status and Counters Data
- Menu Access To Status and Counters
- General System Information
- Task Monitor—Collecting Processor Data
- Switch Management Address Information
- Port Status
- Viewing Port and Trunk Group Statistics and Flow Control Status
- Viewing the Switch’s MAC Address Tables
- Spanning Tree Protocol (MSTP) Information
- Internet Group Management Protocol (IGMP) Status
- VLAN Information
- Web Browser Interface Status Information
- Interface Monitoring Features
- Locating a Device
- C.Troubleshooting
- Contents
- Overview
- Troubleshooting Approaches
- Browser or Telnet Access Problems
- Unusual Network Activity
- General Problems
- 802.1Q Prioritization Problems
- IGMP-Related Problems
- LACP-Related Problems
- Port-Based Access Control (802.1X)-Related Problems
- QoS-Related Problems
- Radius-Related Problems
- Spanning-Tree Protocol (MSTP) and Fast-Uplink Problems
- SSH-Related Problems
- TACACS-Related Problems
- TimeP, SNTP, or Gateway Problems
- VLAN-Related Problems
- Fan Failure
- Using the Event Log for Troubleshooting Switch Problems
- Debug/Syslog Operation
- Debug/Syslog Messaging
- Debug/Syslog Destination Devices
- Debug/Syslog Configuration Commands
- Configuring Debug/Syslog Operation
- Debug Command
- Logging Command
- Adding a Description for a Syslog Server
- Adding a Priority Description
- Configuring the Severity Level for Event Log Messages Sent to a Syslog Server
- Operating Notes for Debug and Syslog
- Diagnostic Tools
- Viewing Switch Configuration and Operation
- Restoring the Factory-Default Configuration
- Restoring a Flash Image
- DNS Resolver
- D.MAC Address Management
- E.Daylight Savings Time on ProCurve Switches
- F.Power-Saving Features
- Index
- Notices & Publication Data

Troubleshooting
Using the Event Log for Troubleshooting Switch Problems
Date is the date in the format mm/dd/yy when an entry is recorded in the log.
Time is the time in the format hh:mm:ss when an entry is recorded in the log.
Event Number is the number assigned to an event. You can turn event
numbering on and off with the [no] log-number command.
System Module is the internal module (such as “ports:” for port manager) that
generated a log entry. If VLANs are configured, then a VLAN name also appears
for an event that is specific to an individual VLAN. Table C-1 lists the different
system modules with a description of each one.
Event Message is a brief description of the operating event.
Table C-1. Event Log System Modules
System
Module
Description
Documented in ProCurve Hardware/
Software guide
802.1x 802.1X authentication: Provides access control on a per-client
or per-port basis:
• Client-level security that allows LAN access to 802.1X
clients (up to 32 per port) with valid user credentials
• Port-level security that allows LAN access only on ports on
which a single 802.1X-capable client (supplicant) has
entered valid RADIUS user credentials
Access Security Guide
addrmgr Address Table Manager: Manages MAC addresses that the
switch has learned and are stored in the switch’s address
table.
Management and Configuration Guide
auth Authorization: A connected client must receive authorization
through web, AMC, RADIUS-based, TACACS+-based, or
802.1X authentication before it can send traffic to the switch.
Access Security Guide
cdp Cisco Discovery Protocol: Supports reading CDP packets
received from neighbor devices, enabling a switch to learn
about adjacent CDP devices. ProCurve switches do not
support the transmission of CDP packets to neighbor devices.
Management and Configuration Guide
chassis Hardware operation, including modules and ports, power
supply, fans, transceivers, CPU interrupt errors, switch
temperature, and so on. Chassis messages include events on
Power Over Ethernet (POE) operation.
Installation Guides
Management and Configuration Guide
console Console interface used to monitor switch and port status,
reconfigure the switch, read the event log through an in-band
Telnet or out-of-band connection.
Installation and Getting Started Guide
C-23










