This read-write value, in milliseconds, sets the switch-wide network latency threshold after which undelivered frames are dropped if they were not delivered in transmission order, and it must always be set higher than the switch's own fcSwitchLatency value. An administrator adjusts this to match the actual round-trip latency across the fabric so frames are not prematurely discarded. For example, extending fcNetworkDropLatency on a switch connected across a longer-distance fabric link avoids dropping frames that are simply delayed by distance rather than lost.