Method and apparatus for simulating IP multinetting

Details Method and apparatus for simulating IP multinetting Method and apparatus for simulating IP multinetting

2009-06-23

2011-11-22

Ho, Duc C (Department: 2465)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S401000, C370S389000, C370S352000, C370S252000

Reexamination Certificate

active

08064458

ABSTRACT:
IP Multinetting on a local area network is simulated by performing VLAN translation at a port connecting to the local area network. This allows IP addresses from multiple subnets to be associated with a single VLAN on the Local Area Network (LAN), while allowing the core switch to process the packets with a one-to-one correspondence between IP Subnet and VLAN. When a packet is received from the local area network at an IP multinetting port, the VLAN ID will be read to determine if the packet contains the IP Multinetting VLAN ID. The IP Subnet address will also be checked to see if the packet is associated with an IP Subnet that is part of the Multinetting. If so, the multinetting VLAN ID will be changed to an IP Subnet specific VLAN ID before the packet is processed by the core switch. In the reverse direction, IP subnet specific VLAN IDs will be translated to the IP Multinetting VLAN ID.

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