Deployment Guide

Table Of Contents
Uplink Failure Detection (UFD)
Uplink failure detection (UFD) provides detection of the loss of upstream connectivity and, if you use this with NIC teaming,
automatic recovery from a failed link.
Topics:
clear ufd-disable
debug uplink-state-group
description
downstream
downstream auto-recover
downstream disable links
enable
show running-config uplink-state-group
show uplink-state-group
uplink-state-group
upstream
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 traffic.
C9000 Series
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}
40 Gigabit Ethernet: fortyGigE {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
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
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