Method and system of aggregate multiple VLANs in a metropolitan area network
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United States of America Patent
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Jun 28, 2005
Grant Date -
Jul 11, 2002
app pub date -
Jan 5, 2001
filing date -
Jan 5, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and system is provided in which data packets from multiple customer VLANs are forwarded over a MAN using VLAN aggregation. A layer-2 switch located at the edge of the MAN connects the customer VLANs to the MAN. The edge switch aggregates multiple customer VLANs (the 'sub-VLANs') into one provider VLAN (the 'super-VLAN'). When a packet is forwarded from the sub-VLAN to the super-VLAN and vice versa, the edge switch uses modified bridge forwarding rules to exchange the customer-configured VLAN-IDs with the provider-configured VLAN-IDs before transporting the packet over the MAN. The edge switch further uses modified bridge media access control (MAC) address learning rules to isolate one customer's traffic from another's (i.e. isolate one sub-VLAN's traffic from another sub-VLAN's traffic).
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