Patent ID: 9503276
Filing Date: 2016-11-22
CPC Classification: H04L

Claim Text:
1. A method of operating a first communication system, comprising the steps of: receiving a first Open Systems Interconnection (OSI) layer two packet from a first network interface; determining whether transmission type of the first OSI layer two packet is unicast, broadcast, or multicast transmission; determining whether destination address of the first OSI layer two packet is a predefined broadcast or multicast address; if the destination address of the first OSI layer two packet is a first predefined broadcast or multicast address, sending a second OSI layer two packet to the first predefined broadcast or multicast address according to predefined rules corresponding to the predefined broadcast or multicast address; wherein content of the second OSI layer two packet is based on content of the first OSI layer two packet; wherein the predefined rules may be determined based on the origin of the first OSI layer two packet; and wherein when the first OSI layer two packet is encapsulated in an OSI layer three packet, the second OSI layer two packet is sent without being encapsulated in an OSI layer three packet; and wherein when the first OSI layer two packet is not encapsulated in any OSI layer three packet, the second OSI layer two packet is sent and encapsulated in at least one OSI layer three packet.