Troubleshooting concepts, Symptoms and solutions, Connectivity issues – HP ProCurve 520wl Wireless Access Point User Manual

Page 76: Wl520 unit will not boot - no led activity, Serial link does not work, Ethernet link does not work, Basic software setup and configuration problems, Lost wl520, telnet, or snmp password, Connectivity issues -2, Ethernet link does not work -2

Troubleshooting Concepts

5-2

troubleshooting concepts

The following list identifies important troubleshooting concepts and topics. The most common initialization and installation

problems relate to IP Addressing. For example, you must have valid IP Addresses for both the WL520 device and the TFTP

server before you can transfer files over Ethernet.

IP Address management is fundamental

IP Address management is fundamental. Refer to

Recording Your Configuration Settings

Factory default units are set for “Dynamic” (DHCP) IP Address assignment

Factory default units are set for “Dynamic” (DHCP) IP Address assignment. The default IP Address for the WL520 is

10.0.0.1. If you connect the WL520 unit to a network with an active DHCP server, then use ScanTool to locate the IP

Address of your unit. If a DHCP server is not active on your subnet, then the ScanTool can be used to configure your

WL520.

The Trivial File Transfer Protocol (TFTP) provides a means to download and upload files

The Trivial File Transfer Protocol (TFTP) provides a means to download and upload files. These files include the WL520

Image (executable program) and configuration files.

If the

If the WL520 password is lost or forgotten, you will need to reset to default values

password is lost or forgotten, you will need to reset to default values

password is lost or forgotten, you will need to reset to default values. The

Reset to Factory Default Procedure

resets configuration, but does not change the current AP Image.

If all else fails

If all else fails… Use the

Forced Reload Procedure

to erase the current WL520 Image and then download a new image.

Once the new image is loaded, use the

Reset to Factory Default Procedure

to set the unit to factory default values and

reconfigure the unit.

WL520 supports a Command Line Interface (CLI)

supports a Command Line Interface (CLI)

supports a Command Line Interface (CLI). If you are having trouble locating your WL520 on the network, connect

to the unit directly using the serial interface and refer to

Using the Command Line Interface

for CLI command syntax and

parameter names.

symptoms and solutions

connectivity issues

Connectivity issues include any issues that prevent you from powering up or connecting to the WL520 device.

wl520 unit will not boot - no led activity

1. Make sure your power source is operating.
2. Make sure all cables are connected to the WL520 unit correctly.

serial link does not work

1. Make sure you are using the proper serial port cable.
2. Double-check the physical network connections.
3. Make sure your PC terminal program (such as HyperTerminal) is active and configured to the following values:

–

Com Port: (COM1, COM2, etc. depending on your computer);

–

Baud rate: 9600; Data bits: 8; Stop bits: 1; Flow Control: None; Parity: None;

–

Line Feeds with Carriage Returns

(In HyperTerminal select:

File -> Properties -> Settings -> ASCII Setup -> Send Line Ends with Line Feeds

File -> Properties -> Settings -> ASCII Setup -> Send Line Ends with Line Feeds.)

ethernet link does not work

1. Double-check the physical network connections. Use a known-good unit to make sure the network connection is present.

Once you have the WL520 IP Address, you can use the “Ping” command over Ethernet to test the IP Address. If the WL520

responds to the Ping, then the Ethernet Interface is working properly.

2. Perform network infrastructure troubleshooting (check switches, routers, etc.).

basic software setup and configuration problems

lost wl520, telnet, or snmp password

1. Perform the

Reset to Factory Default Procedure

in this guide. This procedure resets system and network parameters, but

does not affect the WL520 Image.

The default WL520 password is “public”, and the default Telnet password is also “public”.

2. Document your password(s) in the form provided in

Recording Your Configuration Settings