Juniper Networks, Inc.

Ravi Pathakota

Naveen K Jain

Srihari Raju Vegesna

Sarin Thomas

Sudipta Kundu

Firdaus Mahiar Irani

Kalpataru Maji

Sai Kishore

Abhijeet Sampatrao Jadhav

A device may store a credit value for each of multiple output components. The device may receive packets from a network device via an input component. The device may cause the input component to queue the packets. The device may selectively dequeue a packet from the input component, to be sent to an output component, based on whether the credit value for the output component satisfies a credit threshold. The device may send the packet to the output component based on a destination of the packet when the packet is dequeued from the input component. The device may determine a size of the packet after the packet is dequeued. The device may update the credit value for the output component based on the size of the packet. The device may output the packet to another network device via the output component.

Apparatus to achieve quality of service (QOS) without requiring fabric speedup

Apparatus to achieve quality of service (QoS) without requiring fabric speedup

A communication device may include a cyclic redundancy check (CRC) calculator. The CRC calculator may determine a packet remainder of a packet based on a data path width associated with the communication device; append zeros to the packet remainder to generate an appended packet remainder equal in size to the data path width; compute a first CRC value for the appended packet; reverse bits of the computed first CRC value to obtain a reversed CRC value; multiply the bit reversed CRC value with a value based on a reciprocal CRC polynomial to generate a multiplication product; compute a second CRC value for the generated multiplication product based on the reciprocal CRC polynomial; and reverse bits of the second CRC value to generate a CRC for the packet.

CRC computation for packet length not multiple of data path width

Techniques relate to the regeneration of a cyclical redundancy check (CRC) value of a data packet in a manner that avoids a complete CRC recomputation based on the entire packet after only a portion of a packet has been modified. When modifying and forwarding a packet, a network device identifies only the changed portions of a packet and computes an updated CRC for the packet based on the original CRC, the modified portions, and the length from the modified field to end of packet.

Regeneration of a packet CRC

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Bengaluru, India

Ravi Pathakota