Patents by Inventor Eric Tsoh-Chang Chao

Eric Tsoh-Chang Chao has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods and apparatus for compensating for time-based sampling by sample packet elimination during export of sampled packets
    Patent number: 8861374
    Abstract: Methods and apparatus for compensating for time-based sampling using packet elimination are disclosed herein. An example method may be implemented in a network device communicatively connected to a network. The method may include: receiving a packet over the network at a monitoring point; replicating the received packet; determining whether to sample the replicated packet using a time-based sampling scheme; upon determining that the replicated packet should be sampled, queuing the replicated packet to a port of the network device; determining whether to eliminate the queued packet by comparing a configured sample rate with a current sample rate; upon determining that the current sample rate is less than the configured sample rate, exporting the queued packet from the network device; and upon determining that the current sample rate is greater than or equal to the configured sample rate, dropping the queued packet.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: October 14, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Zachariah Cherian, Eric Tsoh-Chang Chao, Neal Kaushal Gokli, Stacy Lee Martin
  • METHODS AND APPARATUS FOR COMPENSATING FOR TIME-BASED SAMPLING BY SAMPLE PACKET ELIMINATION DURING EXPORT OF SAMPLED PACKETS
    Publication number: 20130258858
    Abstract: Methods and apparatus for compensating for time-based sampling using packet elimination are disclosed herein. An example method may be implemented in a network device communicatively connected to a network. The method may include: receiving a packet over the network at a monitoring point; replicating the received packet; determining whether to sample the replicated packet using a time-based sampling scheme; upon determining that the replicated packet should be sampled, queuing the replicated packet to a port of the network device; determining whether to eliminate the queued packet by comparing a configured sample rate with a current sample rate; upon determining that the current sample rate is less than the configured sample rate, exporting the queued packet from the network device; and upon determining that the current sample rate is greater than or equal to the configured sample rate, dropping the queued packet.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 3, 2013
    Applicant: CISCO TECHNOLOGY, INC.
    Inventors: Zachariah Cherian, Eric Tsoh-Chang Chao, Neal Kaushal Gokli, Stacy Lee Martin