1/LAN stops working on XG230

Question

1 / LAN stops working. We have had twice now where we lose all outside connections. We have changed to a backup internet and can get to the web interface and use tools to ping anything on the outside through 2/WAN. We think we "fix" the issue by changing the port to DHCP or Static and rebooting. We have gone from Static where we started to DHCP and it started working. Stopped two days later, we changed back to static and rebooted. Worked again. That is where we currently are sitting.

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Aditya Patel · Answer

HI AdamVanDusen, 
 
 As per your issue you loose internet connection after 2-3 days , seems consistent unless you reboot the appliance would need to conduct simple test 
 Test 1. 
 First, check the arp table for WAN interface if the Gateway address is associated with a Mac Address . If it is complete then it is possible the ARP entry on the Router is deleted. If it shows "In-complete" you may add a Static Arp Entry for the same and the MAC address would be your WAN gateway's MAC address. 
 To diagnose this issue could you run a command in console/SSH 
 console >system diagnostics utilities arp ping interface PortB (Gateway address) 
 If you got the reply , you may check again if the internet connection is restored or not . 
 If the connection is restored then it is possible that the ISP gateway may have rebooted automatically and the ARP table on the router is wiped clean. Now at this stage the XG appliance already have an ARP entry and would not send again . 
 You would need to follow two steps if necessary to maintain the ARP on the ISP gateway . 
 Connect a Common Layer 2 switch in between the WAN interface and ISP connection . If that does not work , Arp bind the MAC address with XG WAN address on the Gateway Router. 
 Hope this would resolve your issue. 
 Thanks and Regards 
 Aditya Patel | Network and Security Engineer

Aditya Patel · Answer

HI AdamVanDusen, 
 you may use the same Steps for you LAN as Well, since its your premise you may check the ARP table on the Switch . Also check if the LAN address entry is registered . If you using L3 device is LAN then ARP ping it , if a L2 device Arp Ping to one of the systems from XG . 
 Thanks 
 Aditya Patel