Reference Guide

Configure uplink failure detection
Consider the following before configuring an uplink-state group:
● You can assign a physical port or a port channel to an uplink-state group.
● You can assign an interface to only one uplink-state group at a time.
● You can designate the uplink-state group as either an upstream or a downstream interface, but not both.
● You can configure multiple uplink-state groups and operate them concurrently.
● You cannot assign both a port channel and its members to an uplink-state group, which would make the group inactive. The
port channels and individual ports that are not part of any port channel can coexist as members of an uplink-state group.
● If one of the upstream interfaces in an uplink-state group goes down, you can configure to set the downstream ports
in an operationally down state with an UFD Disabled error status. You can configure the system to disable either a user-
configurable set of downstream ports or all the downstream ports in the group.
● The downstream ports are disabled in an order starting from the lowest numbered port to the highest.
● When an upstream interface in an uplink-state group that was down comes up, the set of UFD-disabled downstream ports
that were down due to that particular upstream interface are brought up, and the UFD Disabled error clears in those
downstream ports.
● If you disable an uplink-state group, the downstream interfaces are not disabled, regardless of the state of the upstream
interfaces.
● If you do not assign upstream interfaces to an uplink-state group, the downstream interfaces are not disabled.
Uplink failure detection on VLT
System management
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