User's Manual

Chapter 11: Troubleshooting
Troubleshooting procedures
Page 11-5
Troubleshooting procedures
Proceed to any appropriate set of diagnostic steps. These are organized as follows:
 Module has lost or does not establish connectivity on page 11-5
 NAT/DHCP-configured SM has lost or does not establish connectivity on page 11-7
 SM Does Not Register to an AP on page 11-9
 Module has lost or does not gain sync on page 11-10
 Module does not establish Ethernet connectivity on page 11-11
 CMM4 does not pass proper GPS sync to connected modules on page 11-12
 Module Software Cannot be Upgraded on page 11-13
 Module Functions Properly, Except Web Interface Became Inaccessible on page 11-13
Module has lost or does not establish connectivity
To troubleshoot a loss of connectivity, perform the following steps:
Procedure 36 Troubleshooting loss of connectivity
1
Isolate the end user/SM from peripheral equipment and variables such as routers,
switches and firewalls.
2
Set up the minimal amount of equipment.
3
On each end of the link:
 Check the cables and connections.
 Verify that the cable/connection scheme—straight-through or crossover—is
correct.
 Verify that the LED labeled LNK is green.
 Access the General Status tab in the Home page of the module.
 Verify that the SM is registered.
 Verify that Received Power Level is -87 dBm or higher.
 Access the IP tab in the Configuration page of the module.
 Verify that IP addresses match and are in the same subnet.
 If RADIUS authentication is configured, ensure that the RADIUS server is
operational