Cambium Networks PMP 450 AP, Configuration Manual

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Chapter 5: Troubleshooting Troubleshooting procedures
Page
5-5
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 5-5
• NAT/DHCP-configured SM has lost or does not establish connectivity on page 5-7
• SM Does Not Register to an AP on page 5-8
•
Module has lost or does not gain sync on page 5-9
• Module does not establish Ethernet connectivity on page 5-10
•
CMM4 does not pass proper GPS sync to connected modules on page 5-11
• Module Software Cannot be Upgraded on page 5-12
• Module Functions Properly, Except Web Interface Became Inaccessible on page 5-12
Module has lost or does not establish connectivity
To troubleshoot a loss of connectivity, perform the following steps:
Procedure 29 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