- Make sure that the default-gateway IP address is reachable from the switch by using the "ping" command. - Use the "show interface" command to verify the IP address and subnet mask of the management interface. However, there are a few scenarios when an AP that was once a gateway will not become a gateway again after having its Ethernet cable reconnected. When this happens, you will see the AP signal LED's scan. Network connection Issues can be few of the things that can be a bit tricky to troubleshoot, Main reason being that there is always not one same cause behind the scenes that caused it, scenario to scenario the cause for the trouble can vary. Does the switch has IP address? Does the Switch connect to the Internet? Can the Switch resolve NCC server's domain? Is there any firewall rule blocks NCC protocol? Does the firewall/modem change its. A “Gateway Unreachable” error occurs when a device cannot communicate with the default gateway, suitable to internet disconnection and network access issues.
