Cambium Networks PMP 450 AP, Configuration Manual

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Chapter 5: Troubleshooting Troubleshooting procedures
Page
5-7
NAT/DHCP-configured SM has lost or does not establish
connectivity
Before troubleshooting this problem, identify the NAT/DHCP configuration from the following list:
• NAT with DHCP Client (DHCP selected as the Connection Type of the WAN interface) and DHCP
Server
• NAT with DHCP Client (DHCP selected as the Connection Type of the WAN interface)
• NAT with DHCP Server
• NAT without DHCP
To troubleshoot a loss of connectivity for a SM configured for NAT/DHCP, perform the following steps.
Procedure 30 Troubleshooting loss of connectivity for NAT/DHCP-configured SM
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.
4 At the SM:
• Access the NAT Table tab in the Logs web page.
• Verify that the correct NAT translations are listed.
RESULT: NAT is eliminated as a possible cause if these translations are correct.
5 If this SM is configured for NAT with DHCP, then at the SM:
• Execute ipconfig (Windows) or ifconfig (Linux)
•
Verify that the PC has an assigned IP address.
• If the PC does not have an assigned IP address, then
o
enter ipconfig /release “Adapter Name” .
o
enter ipconfig /renew “Adapter Name” .
o
reboot the PC.
o
after the PC has completed rebooting, execute ipconfig
o
if the PC has an assigned IP address, then
o
access the NAT DHCP Statistics tab in the Statistics web page of the SM.
o
verify that DHCP is operating as configured.
6 After connectivity has been re-established, reinstall network elements and variables that
you removed in Step 1.