Users Guide

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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, VLT, and Stacking modes, the UFD group number is 1 by default and cannot be changed.
clear ufd-disable
Re-enable one or more downstream interfaces on the switch/router that are in a UFD-Disabled Error state so that an interface can
send and receive trac.
Syntax
clear ufd-disable {interface interface | uplink-state-group group-id}
Parameters
interface interface Specify one or more downstream interfaces. For interface, enter one of the
following interface types:
• 10 Gigabit Ethernet: tengigabitethernet {slot/port |slot/
port-range}
• Port channel: port-channel {1-512 | port-channel-range}
Where port-range and port-channel-range specify a range of ports
separated by a dash (-) and/or individual ports/port channels in any order; for
example: tengigabitethernet 1/1-2,5,9,11-12 port-channel
1-3,5. A comma is required to separate each port and port-range entry.
uplink-state-group
group-id
Re-enables all UFD-disabled downstream interfaces in the group. The valid group-id
values are from 1 to 16.
Defaults A downstream interface in a UFD-disabled uplink-state group is also disabled and is in a UFD-Disabled Error
state.
Command Modes CONFIGURATION
Supported Modes Programmable-Mux (PMUX)
Command History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Related Commands
• downstream — assigns a port or port-channel to the uplink-state group as a downstream interface.
• uplink-state-group — creates an uplink-state group and enables the tracking of upstream links.
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Uplink Failure Detection (UFD)