Method and apparatus for simulating IP multinetting

摘要

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.

主权项

1. A method of processing a packet for forwarding between an external network and a local network, the method comprising:
receiving the packet from the external network; and when a virtual local area network (VLAN) identifier associated with the received packet is associated with a multinetting VLAN and a destination address of the received packet is within a subnet assigned to the multinetting VLAN, transmitting the received packet with the multinetting VLAN identifier from a multinetting port determined for the received packet onto the local network.