I had a very similar issue with a SJC server.
My original ticket got a stock reply:
Hello,
Thank you for contacting us!
No, we are unaware of any such network issues during the referenced period of time. Are you still experiencing any issues?
Regards,
Bryan M.
Systems Administrator
To which I replied
To troubleshoot the problem, I was running tcpdump on the server (a FreePBX installation) 24/7 and also running pings every 2 seconds to 8.8.8.8 (Google DNS) and 71.94.xx.xx (my home). In addition, I was pinging the server from home.
Please see attached .pcap file, unfiltered other than saving only the time range 14:27 to 14:34. When the system was working normally (before and after the trouble) you can see ICMP requests and responses, SIP traffic, DNS lookups, etc.
During the trouble, packets are sent out normally but nothing is received, except ARP and ICMP errors. On the pings from home, there were “time to live exceeded” errors, so this seems very unlikely to be a problem with the server.
I have not seen any of the outages lasting only a few seconds since starting the detailed tracking, but they seem to occur every couple of days and I can update the ticket when one happens.
Let me know if any other info would be useful.
Thanks.
And their reply:
Hello,
Thanks for your patience. After further investigation, we identified a software bug within our edge infrastructure that caused an outage across our SJC Network around the time you reported. We have been working extensively with our Vendor Support in efforts of resolving the issue permanently. We appreciate your cooperation and let us know if there is anything else we can do to assist you in the future.
Thank you for being a part of Vultr.com
Regards,
Micah R.
Jr Network Engineer
The problem was quickly corrected.