Virtual local area networks having rules of precedence

H - Electricity – 04 – L

Patent

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H04L 12/46 (2006.01)

Patent

CA 2355648

A switch for use in a communications system having multiple local area networks interconnected by multiple switches so as to be configurable into different types of virtual local area networks inclules first and second communication ports. The first communication port is connected directly to a local area network and the second communication port interconnects with other system switches. A switch control detects a communication from the local area network and identifies a virtual local area network over which the communication is to be transmitted based upon rules of precedence for different types of virtual local area networks. The communication is appended with a VLAN tag representing the identified virtual local area network so as to form a VLAN communication that is directed to the second communication port for transmission over the identified virtual local area network.

L'invention concerne un commutateur utilisé dans un système de communications possédant plusieurs réseaux locaux d'entreprise (LAN) reliés par plusieurs commutateurs, de façon à être configurés selon différents types de réseaux locaux d'entreprise virtuels (VLAN), comprenant un premier et un second port de communication. Le premier port de communication est relié directement à un réseau local d'entreprise, et le second port de communication relie d'autres commutateurs de système. Une commande de commutateur détecte une communication issue du réseau local d'entreprise, et identifie un réseau local d'entreprise virtuel sur lequel la communication doit être transmise, en fonction de règles de préséance pour différents types de réseaux locaux d'entreprise virtuels. Une étiquette de réseau local d'entreprise virtuel représentant le VLAN identifié est attribuée à la communication, de façon à former une communication VLAN dirigée vers le second port de communication pour transmission sur les VLAN identifiés.

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