I have a small SG300-8 switch to connect 1Gbps Internet Connection to a router and a server console. Today we have suffered a network outage and I don't know the reason and if it has been related with the switch model.
Since this afternoon I have a great number of packet losses between the ISP and our switch. So many losses that I couldn't connect to any device (switch, router, service console) from Internet and we have completely lost internet connection. The ISP have told me that he was receiving a great number of input errors (mainly CRC errors) in his network interface. But suddenly it has begun working again.
I have only these logs from the switch and I'm very worried about this problem. The logs of the switch:
5-Jun-2012 03:23:01 :%STP-W-PORTSTATUS: gi2: STP status Forwarding
What device is gi2 connected to? It looks like there may be a port setting mismatch (ie full duplex v. half duplex) that may be causing the checksum errors. Can also look at the output from show spanning-tree detail.
Don't forget, you can always try cisco small biz support via chat. They are top notch.
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