API Guide
Configure uplink failure detection
Consider the following before configuring an uplink-state group:
● An uplink-state group is considered to be operationally up if it has at least one upstream interface in the Link-Up state.
● An uplink-state group is considered to be operationally down if it has no upstream interfaces in the Link-Up state.
● 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 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 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 order starting from the lowest numbered port to the highest numbered port.
● 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.
1310
Uplink Failure Detection