Patent ID: 9455934
Filing Date: 2016-09-27
CPC Classification: H04L

Claim Text:
1. A first network switch, comprising: a first network switch element coupled to a physical switch link to transmit a first untagged and not encapsulated frame for a local network over a first logical connection of the physical switch link to a first network switch element of a second network switch coupled to the physical switch link, when the physical switch link is part of an active topology of the local network; and a second network switch element coupled to the physical switch link to transmit a second untagged and not encapsulated frame for a foreign network over a second logical connection of the physical switch link to a second network switch element of the second network switch coupled to the physical switch link, when the physical switch link is not part of the active topology of the local network, and further to check a Media Access Control address and/or Service Identifier or Virtual Local Area Network Identifier (MAC-SA/VID) of a broadcast frame for a foreign network, and transmit the broadcast frame, or not, on the basis of such.