This pilot fish gets a request for a new server, and after being satisfied with all his post-install checks, he turns it over to the customers. But they say the server is experiencing intermittent network connectivity.
So fish has the network team check the port, network switch and cable. All seems fine: constant link status and no dropped packets. But the problem persists. Fish calls vendor for help and sends it the diag report from the lights-out interface. But the hardware looks fine.
New day, new strategy. Fish tries “watch nmap” from his workstation; no issues. He tries it from the Kickstart server. And this is interesting: The server is working one run, but no response the next. On a hunch, fish adds ARP check in the watch. Now he’s getting somewhere: ARP is alternating between two MAC address from the same IP, one of which fish doesn’t recognize.
from Computerworld https://ift.tt/2tXY2sT
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