| 摘要 |
The present invention provides for a communications network configuration for the connection of at least three parties wherein second and third parties are both connected to a first party in a manner wherein connection between the second and third parties is prevented, the network comprising a virtual local area network, the first and second parties defining at least part of a first virtual local area network, and the first and third parties defining at least part of a second separate virtual local area network, wherein the first party includes a physical router interface common to both the first and the second virtual local area networks and configured as a plurality of logical sub-interfaces. <??>The configuration of the present invention consists of several VLANs each defined between the central party and each of the other parties respectively. <??>Thus, each such VLAN has two ports as members, i.e. that of the first party and that of the second or third party etc. The first party's aggregate interface is therefore advantageously a member of all of the VLANs serving to form the connection configuration required of the first, second and third parties. <??>Adoption of the IEEE 802.1q standard has become possible for routers, and indeed other devices attached to each switch, to identify VLAN tags such that such devices can thereby determine which VLAN a particular item of traffic belongs to and advantageously to tag it to that VLAN before it actually enters the switch. <IMAGE> |
