公开(公告)号：WO1995035610A1

公开(公告)日：1995-12-28

申请号：PCT/US1995007485

申请日：1995-06-12

Applicant: CISCO SYSTEMS, INC.

Inventor： CISCO SYSTEMS, INC. ,  CHIN, Hon, Wah ,  SCOTT, Frederick

IPC: H04L12/18

CPC classification number: H04L12/1854 ,  H04L12/4641

Abstract: A method for establishing and maintaining virtual network domains in a segmented computer network (400), having a first domain and a second domain. A first table entry for a first end station (SA1, SA3) in a first forwarding table of a first switching fabric circuit (A) is created. The first table entry includes domain information specifying that the first end station (SA1, SA3) is in the first domain and port information specifying that the first end station is coupled to a first port (1). A packet having the first end station as a source is received by the first port (1) of the first switching fabric circuit (A), and a destination for the packet is determined. If the packet specifies a second end station (SA5, SA7) of the first domain as the destination, the packet is forwarded to the second end station. If the destination for the packet specifies more than one end station, the domain of the source of the packet is determined, and the packet is forwarded to the specified end stations of the first domain. For a second embodiment, source and destination information are compared to determine forwarding information for a packet, and the packet is forwarded as specified by the forwarding information. For a third embodiment, intelligent selection between multiple paths to the same end station is provided by the comparison of source and destination.

Abstract translation: 一种用于在具有第一域和第二域的分段计算机网络（400）中建立和维护虚拟网络域的方法。 创建第一交换结构电路（A）的第一转发表中的第一终端站（SA1，SA3）的第一表条目。 第一表条目包括指定第一端站（SA1，SA3）处于第一域的域信息，以及指定第一端站耦合到第一端口（1）的端口信息。 具有第一端站作为源的分组由第一交换结构电路（A）的第一端口（1）接收，并且确定分组的目的地。 如果分组指定第一域的第二终端站（SA5，SA7）作为目的地，则将该分组转发到第二终端站。 如果分组的目的地指定了多个终端站，则确定分组的源的域，并将分组转发到第一域的指定终端站。 对于第二实施例，比较源和目的地信息以确定分组的转发信息，并且转发如转发信息所指定的分组。 对于第三实施例，通过源和目的地的比较来提供到同一终端站的多个路径之间的智能选择。