Users 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-cong 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 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:
• 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.
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Uplink Failure Detection (UFD) 1891