How Uplink Failure Detection Works - Dell Force10 S4810P Configuration Manual

High-density, 1ru 48-port 10gbe switch

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Figure 51-1. Uplink Failure Detection

How Uplink Failure Detection Works

UFD creates an association between upstream and downstream interfaces. The association of uplink and

downlink interfaces is called an uplink-state group. An interface in an uplink-state group can be a physical

interface or a port-channel (LAG) aggregation of physical interfaces.

An enabled uplink-state group tracks the state of all assigned upstream interfaces. Failure on an upstream

interface results in the automatic disabling of downstream interfaces in the uplink-state group. As a result,

downstream devices can execute the protection or recovery procedures they have in place to establish

alternate connectivity paths as shown in

Uplink Failure Detection (UFD)