We have a site which experienced a rare failure. An “18-wheeler” lost control and plowed down 3 or 4 power/utility poles. This wiped out power and internet to our clinic and it was discovered that the on-site power backup solution was not working. We have most of the clinic back up with the exception of one segment (and, finally to the point of this question.)
We rebooted everything but had no connectivity (to anything), checked a few things on the local firewall and restarted it, this gave us “some” connectivity. We then moved all cabling from the primary switch onto the remaining two (these are Enterprise class D-Link switches, one managed and two smart). By the end of the day we had the segment working well.
The next morning another call, no connectivity on this node! We discovered quickly that those systems connected to the last switch were still functional so this made for a quick fix and we moved the critical connections onto the last switch. Case closed.
Next day, yet another trouble ticket. This time the clients closest to the remaining switch, less than ~20 feet, were still functioning, those ~45 feet or less away were getting sporadic connectivity, and those ~50 feet or greater were getting no connectivity.
I have never seen anything like this, anybody have any suggestions?
JRM
