Administrator Guide

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.
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:
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the slot/port[/subport] | slot/port[/subport]-
range
● 40-Gigabit Ethernet:fortyGigE {slot/port}
● Port channel: port-channel {1–128 | 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: gigabitethernet 1/1-2,5,9,11-12 port-channel 1-3,5. A
comma is required to separate each port and port-range entry.
If a 40G port is fanned-out into 10G ports, the range is entered as slot/sort/
subport-slot/port/subport.
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, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10.0.2 Introduced on the Z9100–ON.
62
1684 Uplink Failure Detection (UFD)