Multiple VLAN Architecture system

A multiple VLAN architecture system, in which multiple different VLANs are capable of operating within a single network, comprising

• at least one network communication medium;
• and
• a LAN-switch coupled to said at least one network communication medium and disposed to receive and route packets, each said packet having a VLAN identifier, and comprising means for routing from a first VLAN to a second VLAN, said means for routing comprising means for removing a first VLAN encapsulation and means for adding a second VLAN encapsulation, said means for adding said second VLAN encapsulation replacing said first VLAN encapsulation with said second VLAN encapsulation, said means for removing and said means for adding located at said LAN-switch;
• wherein said LAN-switch comprises a plurality of static ports, each said static port being associated with one of said VLANs.

A multiple VLAN architecture system, in which multiple different VLANs are capable of operating within a single network, comprising

• a plurality of network communication media;
• a first VLAN comprising a first plurality of devices, each one of said first plurality of devices coupled to at least one of said network communication media;
• and
• a second VLAN comprising a second plurality of devices, each one of said second plurality of devices coupled to at least one of said network communication media;
• said first plurality of devices and said second plurality of devices sharing at least one common device;
• and
• said system further comprising:
• means for receiving a packet having a first encapsulation according to said first VLAN;
• means for removing said first encapsulation;
• means for re-encapsulating said packet with a second encapsulation according to said second VLAN;
• and
• means for receiving a packet from a source coupled to said first VLAN and transmitting said packet to a destination coupled to said second VLAN;
• wherein said first encapsulation and said second encapsulation are substantially different, and said means for removing and said means for re-encapsulating are located at said at least one common device.

A multiple VLAN architecture system, in which multiple different VLANs are capable of operating within a single network, comprising

• a plurality of network communication media;
• a first VLAN comprising a first plurality of devices, each one of said first plurality of devices coupled to at least one of said network communication media;
• and
• a second VLAN comprising a second plurality of devices, each one of said second plurality of devices coupled to at least one of said network communication media;
• said first plurality of devices and said second plurality of devices sharing at least one common device;
• and
• said system further comprising:
• means for receiving a packet having a first encapsulation according to said first VLAN;
• means for removing said first encapsulation;
• means for re-encapsulating said packet with a second encapsulation according to said second VLAN;
• and
• means for defining a new VLAN comprising a new corresponding plurality of devices, each one of said new corresponding plurality of devices coupled to at least one of said network communication media;
• wherein said first encapsulation and said second encapsulation are substantially different, and said means for removing and said means for re-encapsulating are located at said at least one common device.

A method for routing a packet in a multiple VLAN architecture system, in which multiple different VLANs are capable of operating within a single network having at least one network communication medium, said system including a LAN-switch coupled to said at least one network communication medium and disposed to receive and route said packet, said packet having a VLAN identifier, said LAN-switch performing the step of:

• routing said packet from a first VLAN to a second VLAN by:
• removing a first VLAN encapsulation;
• and
• replacing said first VLAN encapsulation with a second VLAN encapsulation;
• wherein said LAN-switch includes a plurality of ports;
• and
• wherein said plurality of ports include at least one dynamic port, and said method further includes steps of:
• associating said at least one dynamic port with a first one of said VLANs;
• and
• reassociating said at least one dynamic port with a second one of said VLANs.

A method for routing a packet in a multiple VLAN architecture system, in which multiple different VLANs are capable of operating within a single network having a plurality of network communication media, said system including a first VLAN comprising a first plurality of devices and a second VLAN comprising a second plurality of devices, each one of said second plurality of devices coupled to at least one of said network communication media, said first plurality of devices and said second plurality of devices sharing at least one common device, said at least one common device performing the steps of:

• receiving a packet having a first encapsulation according to said first VLAN;
• removing said first encapsulation;
• re-encapsulating said packet with a second encapsulation according to said second VLAN, wherein said first encapsulation and said second encapsulation are substantially different;
• and
• defining a new VLAN comprising a new corresponding plurality of devices, each one of said new corresponding plurality of devices coupled to at least one of said network communication media.

An apparatus having a central processing unit (CPU) and a memory coupled to said CPU for switching a packet between a plurality of different VLAN segments operational within a single network having one or more VLANs and one or more management domains, each management domain for management of at least one VLAN, the apparatus including:

• a network interface in communication with at least one network communication medium and with said CPU;
• a packet reception mechanism configured to receive said packet from said at least one network communication medium using the network interface, said packet having a VLAN identifier and originating from a first VLAN segment;
• a packet routing mechanism configured to route said packet to a second VLAN segment;
• and
• a VLAN configuration mechanism configured to maintain said one or more management domains in said apparatus, wherein the VLAN configuration mechanism includes:
• a case detection mechanism configured to detect when to request an advertisement message;
• a request advertisement mechanism, responsive to the case detection mechanism, configured to send an advert-request message over said at least one network communication medium;
• an advertisement reception mechanism configured to receive said advertisement message from said at least one network communication medium;
• and
• a configuration maintenance mechanism, responsive to changes in said one or more management domains, configured to maintain a configuration revision number for each of said one or more management domains.

An apparatus having a central processing unit (CPU) and a memory coupled to said CPU for switching a packet between a plurality of different VLAN segments operational within a single network having one or more VLANs and one or more management domains, each management domain for management of at least one VLAN, the apparatus including:

• a network interface in communication with at least one network communication medium and with said CPU;
• a packet reception mechanism configured to receive said packet from said at least one network communication medium using the network interface, said packet having a VLAN identifier and originating from a first VLAN segment;
• a packet routing mechanism configured to route said packet to a second VLAN segment;
• and
• a VLAN configuration mechanism configured to maintain said one or more management domains in said apparatus, wherein the VLAN configuration mechanism includes:
• a case detection mechanism configured to detect when to send an advertisement message;
• a send advertisement sending mechanism, responsive to the case detection mechanism, configured to send an advertisement message over said at least one network communication medium;
• an advert-request message reception mechanism configured to receive an advert-request message from said at least one network communication medium;
• and
• a configuration maintenance mechanism, responsive to changes in said one or more management domains, configured to maintain a configuration revision number for each of said one or more management domains.

A computer program product including:

• a computer usable storage medium having computer readable code embodied therein for causing a computer to switch a packet between a plurality of different VLAN segments operational within a single network having one or more VLANs and one or more management domains, each management domain for management of at least one VLAN, said computer readable code including:
• computer readable program code configured to cause said computer to effect a network interface in communication with at least one network communication medium and with said CPU;
• computer readable program code configured to cause said computer to effect a packet reception mechanism configured to receive said packet from said at least one network communication medium using the network interface, said packet having a VLAN identifier and originating from a first VLAN segment;
• computer readable program code configured to cause said computer to effect a packet routing mechanism configured to route said packet to a second VLAN segment;
• and
• computer readable program code configured to cause said computer to effect a VLAN configuration mechanism configured to maintain said one or more management domains in said product, wherein the VLAN configuration mechanism includes:
• computer readable program code configured to cause said computer to effect a case detection mechanism configure to detect when to request an advertisement message;
• computer readable program code configured to cause said computer to effect a request advertisement mechanism, responsive to the case detection mechanism, configured to send an advert-request message over said at least one network communication medium;
• computer readable program code configure to cause said computer to effect an advertisement reception mechanism configured to receive said advertisement message from said at least one network communication medium;
• and
• computer readable program code configured to cause said computer to effect a configuration maintenance mechanism, responsive to changes in said one or more management domains, configured to maintain a configuration revision number for each of said one or more management domains.

A computer program product including:

• a computer usable storage medium having computer readable code embodied therein for causing a computer to switch a packet between a plurality of different VLAN segments operational within a single network having one or more VLANs and one or more management domains, each management domain for management of at least one VLAN, said computer readable code including:
• computer readable program code configured to cause said computer to effect a network interface in communication with at least one network communication medium and with said CPU;
• computer readable program code configured to cause said computer to effect a packet reception mechanism configured to receive said packet from said at least one network communication medium using the network interface, said packet having a VLAN identifier and originating from a first VLAN segment;
• computer readable program code configured to cause said computer to effect a packet routing mechanism configured to route said packet to a second VLAN segment;
• and
• computer readable program code configured to cause said computer to effect a VLAN configuration mechanism configured to maintain said one or more management domains in said product, wherein the VLAN configuration mechanism includes:
• computer readable program code configured to cause said computer to effect a case detection mechanism configured to detect when to send an advertisement message;
• computer readable program code configured to cause said computer to effect a send advertisement sending mechanism, responsive to the case detection mechanism, configured to send an advertisement message over said at least one network communication medium;
• computer readable program code configured to cause said computer to effect an advert-request message reception mechanism configured to receive an advert-request message from said at least one communication medium;
• and
• computer readable program code configured to cause said computer to effect a configuration maintenance mechanism, responsive to changes in said one or more management domains, configured to maintain a configuration revision number for each of said one or more management domains.

A multiple VLAN architecture in which multiple different VLANs are capable of operating within a single network, comprising

• at least one network communication medium;
• and
• a LAN-switch coupled to said at least one network communication medium and disposed to receive and route packets, each said packet having a VLAN identifier, and comprising means for routing from a first VLAN to a second VLAN, said means for routing comprising means for removing a first VLAN encapsulation and means for adding a second VLAN encapsulation, said means for adding said second VLAN encapsulation replacing said first VLAN encapsulation with said second VLAN encapsulation, said means for removing and said means for adding located at said LAN-switch;
• wherein said LAN-switch comprises a plurality of ports;
• and
• wherein said plurality of ports include at least one dynamic port which is associated with a first one of said VLANs and includes means for being reassociated with a second one of said VLANs.