To troubleshoot a loss of connectivity, perform the following steps:
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 |
4 |
On the SM end of the link: · Verify that the PC that is connected to the SM is correctly configured to obtain an IP address through DHCP. · Execute ipconfig (Windows) or ifconfig (linux) · Verify that the PC has an assigned IP address. |
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5 |
On each end of the link: · Access the General tab in the Configuration page of each module. · Verify that the setting for Link Speeds (or negotiation) matches that of the other module. · Access the Radio tab in the Configuration page of each module. · Verify that the Radio Frequency Carrier setting is checked in the Custom Radio Frequency Scan Selection List. · Verify that the Color Code setting matches that of the other module. · Access the browser LAN settings (for example, at · Verify that none of the settings are selected. · Access the Link Capacity Test tab in the Tools page of the module. · Perform a link test · Verify that the link test results show efficiency greater than 90% in both the uplink and downlink · Execute ping. o Verify that no packet loss was experienced. o Verify that response times are not significantly greater than § 4 ms from AP to SM § 15 ms from SM to AP o Replace any cables that you suspect may be causing the problem.
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6 |
After connectivity has been re-established, reinstall network elements and variables that you removed in Step 1. |