Dell PowerEdge FX2/FX2s - Manual (Page 263)

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Uplink Failure Detection (UFD)
Uplink failure detection (UFD) provides detection of the loss of upstream connectivity and, if you use this
with network interface controller (NIC) teaming, automatic recovery from a failed link.
NOTE: In Standalone and VLT modes, the UFD group number is 1 by default and cannot be
changed.
The UFD commands described in this chapter are:
• defer-timer
• enable
defer-timer
Configure a timer that prevents unwanted flapping of downstream ports when the uplink port channel
goes down and comes up.
Syntax defer-timerseconds
Defaults 10 (Standalone mode)
Parameters
seconds Specify the time (in seconds) to wait for the upstream port
channel (LAG 128) to come back up before server ports are
brought down. The range is from 1 to 120.
Command
Modes UPLINK-STATE-GROUP
Command
History
Version 9.4(0.0) Supported on the FN I/O aggregator.
Usage
Information This command is not supported in programmable-mux mode.
enable
Re-enable upstream-link tracking for an uplink-state group after it has been disabled.
Syntax enable
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