Patent ID: 8000344
Filing Date: 2011-08-16
Classification: H04L

Abstract:
1. A method for transmitting a layer 2 frame over a secure layer 2 broadcast transport network, the method comprising: (a) receiving, at a transmit port of a layer 2 forwarding device, a layer 2 frame to be sent over a secure layer 2 broadcast transport network, the layer 2 frame including a first VLAN identifier used to identify a first VLAN; (b) mapping the first VLAN identifier to a second VLAN identifier used by the secure layer 2 broadcast transport network to identify the first VLAN and to limit the layer 2 broadcast domain of the layer 2 frame in the layer 2 broadcast transport network to the first VLAN; (c) encrypting a portion of the layer 2 frame including the first VLAN identifier and inserting the second VLAN identifier in an unencrypted portion of the layer 2 frame; and (d) transmitting the layer 2 frame over the secure layer 2 broadcast transport network.