I am relatively new to this forum, and wanted to get some useful feedbacks and resolution from "network-PROs" on my problem..
I have a network with a main router connected to the Fortigate Firewall 100E, that is connected to a Cisco SG300-28PP 28-Port Gigabit PoE+ Managed Switch through which all the user computers and IP phones are connected.
Lately, time-to-time, out of no-where, the internet keeps disconnecting. From the LAN, I'm unable to access the firewall and its unreachable. The WiFi from the main router works fine, that means the Internet is okay. After restarting the firewall physically, everything is back to normal and the internet runs fine.. I have checked the switch, and it shows no sign of problem in any way!
I don't know if its the problem of the firewall or the switch. Hope someone can guide me to the right direction.
That power supply lost is from the time, when I had to restart the Firewall from the switch, since it was inaccessible.
P.S: I have been seeing this logs about Link-up and Link-down for the WAN.. The same problem hasn't happened yet. I have also restarted the CISCO Switch couple of days back, since then, there is no problem.