Transition Networks
SISTP1040-382B-LRT Install Guide
33806 Rev. B
Page 30 of 39
problem, while other switches or PDs may show a greater immunity to the problem. This is a typical
occurrence during lightning storms or AC power maintenance. In a worst-case scenario, a PoE power supply
may appear to shut down, with no PoE output voltage to any port. It’s possible the switch’s Ethernet
functions appear normal, and only the PoE functions are disrupted or degraded, or the switch may power
down completely due to the AC disturbance. PDs may exhibit unusual behavior. In such cases, power cycle
the switch (unplug the switch, wait at least three seconds, then plug it back in. This will ensure a total system
reset that should restore normal operation.
17.
Check if related features (LLDP mode, CDP mode) are enabled. See the Transition Networks
more information.
