New ESXi host going into a rack that hangs off a campus 3850. Management on copper came up without drama, the 10G uplinks did not: as soon as the server boots, the switch port drops into err-disable and the host sees nothing on that vmnic. Lenovo ThinkSystem SR650, 7X06CTO1WW, with an Emulex VFA5.2…
Two Flex System enclosures, each with an EN4093R 10Gb Scalable Switch (option 49Y4270) as the network module. Ports come back error-disabled after a chassis power event, and less often drop into the same state while everything is running. It is not always the same ports, which is what makes this so…
On an Arista 7050QX running EOS 4.14 the poster tried to use third-party QSFP+ DAC cables; the ports went to errdisable as unqualified transceivers. They patched the XcvrAgent.py agent under /usr/lib/python2.7/site-packages to skip the manufacturer check, which cleared the errdisable state but left…
