Tejas Networks Limited

Balasubramanian Krishnamoorthy

Vinod Kumar Madaiah

Somnath Ojha

Jishnu Aravindakshan

The invention relates to a method and device for managing the interconnection between network domains. In one embodiment this is accomplished by classifying the received frame based on service level agreement, wherein the classifying includes checking the received frame Ethertype value is same as the port on which the frame is received, recognizing an Ethertype of the egress port of the received frame, wherein the recognizing includes checking the received frame Ethertype value is same or not and translating the frame into a compatible Ethertype and forwarding the same to the next available port.

Interworking network element

The present invention relates to a protection switching method in a communication network, the communication network including plurality of communication devices forming a linear chain and at least one non-ERPS on the nodes ERPS (Ethernet Ring Protection Switching) device connecting terminal ports of the linear chain and thereby forming a ring. In one embodiment this is accomplished by instantiating ERPS on each communication device that forms a linear chain and on each non-terminal ports of the linear chain, identifying a node or link fault in the network, wherein the link or node fault is detected by Continuity Check Message (CCM), Loss of Light (LOL), Loss of Signal (LOS), Loss of periodic continuity check messages (IEEE 802.1 ag) or any other mechanisms thereof, blocking ports of the communication device in response to the detection of fault, periodically broadcasting a fault message by the blocked ports of the communication devices, wherein the message gets terminated at the ports of the communication device within the linear chain network without reaching the non-ERPS device, flushing the Media Access Control (MAC) table entry upon receipt of the fault message by all the communication device and unblocking of a root port link (RPL) of the linear for providing an alternate path to route network traffic after receipt of the fault message.

Ethernet chain protection switching

The present disclosure relates to managing a logical topology change in a network. The entries of the forwarding database are flushed intelligently without arbitrarily removing the forwarding database resulting in flooding. In one embodiment, a logical topology number (LTN) is maintained by all the interfaces and the forwarding database in the logical topology. In case of any change in the network topology, the LTN of the interfaces affected by the topology change is changed. Further, while sending a frame, LTN of the forwarding database entry for a destination address is compared with LTN of the logical topology. In case of mismatch, the entry is invalidated and the frame is flooded to all other ports for entering new entries into the database. LTN of the forwarding database entry for a source address is compared with the LTN of the logical topology.

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Bengaluru, India

Balasubramanian Krishnamoorthy