Software configurable network switching device

A network switching device, comprising:

• a plurality of input/output devices, each configured to communicate packets;
• a processing unit and a memory, the processing unit configured to associate each of the input/output devices with at least one logical switching device, wherein each logical switching device includes one of a logical bridge and a logical router;
• and
• at least one data structure stored in the memory and configured to contain configuration information of the at least one logical switching device.

A network switching device comprising:

• a plurality of input/output devices configured to communicate packets;
• an enabler configured to enable a user to selectively associate each of said input/output devices with a selected one or more of a plurality of logical bridges, and to create one or more data structures that represent the input/output devices which have been associated with each logical bridge by the user;
• and
• a responder configured to respond to said one or more data structures by causing each logical bridge with which one or more input/output devices have been associated to operate as a media access control level bridge including each of the input/output devices represented as associated with such logical bridge by said one or more data structures, wherein the enabler is further configured to enable a user to selectively associate each of said logical bridges with a selected one or more of a plurality of logical routers, and to create one or more data structures that represent which logical bridges have been associated with each logical router by the user;
• and
• wherein the responder is further configured to respond to said one or more data structures representing which logical bridges have been associated with each logical router by causing each logical router to operate as a separate logical router having an interface to each of the logical bridges.

A network switching device comprising:

• a plurality of input/output devices configured to communicate packets;
• an enabler configured to enable a user to selectively associate each of said input/output devices with a selected one or more logical bridges, and to create one or more data structures that represent the input/output devices which have been associated with each logical bridge by the user;
• and
• a responder configured to respond to said one or more data structures by causing each logical bridge with which one or more input/output devices have been associated to operate as a media access control level bridge including, and having an attached port for, each of the input/output devices represented as associated with such logical bridge by said one or more data structures,
• wherein the enabler is further configured to enable a user to selectively associate each of said logical bridges with a selected one or more logical routers, and to create one or more data structures that represent which logical bridges have been associated with each logical router by the user;
• and
• wherein the responder is further configured to respond to said one or more data structures representing which logical bridges have been associated with each logical router by causing each logical router with which one or more logical bridges has been associated to operate as a separate network layer router having a network interface to each of the bridges represented as associated with such logical router by said one or more data structures.

A network switching device comprising:

• a plurality of input/output devices configured to communicate packets;
• an enabler configured to enable a user to selectively associate a plurality of logical bridges with a selected internal connection among logical bridges, and to create one or more data structures that represent the logical bridges which have been associated with the selected internal connection among logical bridges;
• and
• a responder configured to respond to said one or more data structures representing which logical bridges have been associated with the selected internal connection among logical bridges by causing the selected internal connection among logical bridges to operate as a separate internal connection to which each of its logical bridges is represented as associated by one or more data structures by forwarding packets from one associated logical bridge to all other associated logical bridges.

A network switching device comprising:

• a plurality of input/output devices configured to communicate packets;
• an enabler configured to enable a user to selectively associate a plurality of logical routers with a selected internal connection among logical routers, and to create one or more data structures that represent the logical routers which have been associated with the selected internal connection among logical routers;
• and
• a responder configured to respond to said one or more data structures representing which logical routers have been associated with the selected internal connection among logical routers by causing the selected internal connection among logical routers to operate as a separate internal connection to which each of its logical routers is represented as associated by one or more data structures by forwarding packets from one associated logical router to all other associated logical routers.

A network switching device comprising:

• a plurality of input/output devices configured to communicate packets;
• an enabler configured to enable a user to selectively associate a plurality of logical switching devices, each of which may be either a logical router or a logical bridge, with a selected internal connection among logical switching devices, and to create one or more data structures that represent the logical switching devices which have been associated with the selected internal connection among logical switching devices;
• and
• a responder configured to respond to said one or more data structures representing which logical switching devices have been associated with the selected internal connection among logical switching devices by the selected internal connection among logical switching devices to operate as a separate internal connection to which each of its logical switching devices is represented as associated by one or more data structures by forwarding packets from one associated logical switching devices to all other associated logical switching devices.