Unidirectional link detection data (1 résultats)

Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Please note that the content of this book primarily consists of articlesavailable from Wikipedia or other free sources online. UniDirectionalLink Detection (UDLD) is a data link layer protocol from Cisco Systemsto monitor the physical configuration of the cables and detectunidirectional links. UDLD complements the Spanning Tree Protocol (STP)which is used to eliminate layer 2 loops. If two devices, A and B, areconnected via a pair of fibres, one used for sending from A to B, otherfrom sending from B to A, it is a bidirectional link (two-way link). Ifone of these fibres are broken, we're left with a unidirectional link(one-way link). The goal of the UDLD protocol is to detect whenever abidirectional link is either broken, such that packets are sent onlyfrom one device to another, or connected wrongly, such that the fibresare connected to different ports.…