Tag: UDLD

Switching

Fiber optics and UDLD

RenĂ© Jorissen on October 20, 2008 • 0 Comments • Tags: #aggressive #bpdu #detection #fiber #forwarding #learning #link #listening #mode #normal #optics #stp #udld #unidirectional

UDLD (Unidirectional Link Detection) is a protocol to help prevent forwarding loops in switched networks. A fiber cable is build from two separate fibers (transmit and receive), where one of the two fiber could fail, which would result in a switch port not able to receive or send traffic. This scenario could result in some … Read More