Abstract: Methods, systems, and computer readable media for testing a system under test (SUT). A method includes sending a first test packet to the SUT over a communication link. The first test packet is associated with a layer 2 secure channel that is bound to an emulated network device. The method includes receiving a second test packet from the SUT over the communication link. The second test packet includes an unencrypted portion and an encrypted portion. The method includes forming a test identifier that uniquely identifies the layer 2 secure channel and the emulated network device using a subset of bits from a secure channel identifier in the unencrypted portion of the second test packet. The method includes decrypting the encrypted portion of the second test packet by finding a security key using the test identifier.

Abstract: A method for transmit timestamp autocalibration includes generating a calibration pulse for calibrating a transmit timestamp in a transmitting device. The method further includes applying the calibration pulse to a transmit data pipeline in the transmitting device. The method further includes sampling a transmit timestamp when the calibration pulse reaches a timestamp sample triggering location in the transmit data pipeline upstream from an egress point of the transmitting device. The method further includes measuring a latency between a time that the calibration pulse reaches the timestamp sample triggering location and a time that the calibration pulse reaches a location downstream from the timestamp sample triggering location. The method further includes generating an adjusted timestamp based on the measured latency and inserting the adjusted timestamp into a data packet to be transmitted from the transmitting device.

Abstract: A method for transmit timestamp autocalibration includes generating a calibration pulse for calibrating a transmit timestamp in a transmitting device. The method further includes applying the calibration pulse to a transmit data pipeline in the transmitting device. The method further includes sampling a transmit timestamp when the calibration pulse reaches a timestamp sample triggering location in the transmit data pipeline upstream from an egress point of the transmitting device. The method further includes measuring a latency between a time that the calibration pulse reaches the timestamp sample triggering location and a time that the calibration pulse reaches a location downstream from the timestamp sample triggering location. The method further includes generating an adjusted timestamp based on the measured latency and inserting the adjusted timestamp into a data packet to be transmitted from the transmitting device.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for efficiently scrambling data in high speed communications networks. One exemplary method includes, in a network equipment test device, providing a scrambler for scrambling data to be transmitted to a device under test. Scrambling the data includes separating a scrambling algorithm into a scramble key portion and a data portion. Scrambling the data further includes pre computing and storing the scramble key portion. Scrambling the data further includes precomputing and storing the data portion. Scrambling the data further includes logically combining the precomputed scramble key portion with the precomputed data portion to produce a data bus width scrambled output data. The method further includes transmitting the scrambled output data over a network to the device under test.

Abstract: Methods, systems, and computer readable media for caching and using scatter list metadata to control DMA receiving of network protocol data are described. According to one method, metadata associated with partially used scatter list entries is cached in memory of a scatter list caching engine. Data to be written to host system memory is received. The scatter list caching engine provides the metadata associated with partially used scatter list entries to a DMA controller to control the DMA writing of the data into host system memory.

Abstract: The subject matter described herein includes methods, systems, and computer readable media for efficiently scrambling data in high speed communications networks. One exemplary method includes, in a network equipment test device, providing a scrambler for scrambling data to be transmitted to a device under test. Scrambling the data includes separating a scrambling algorithm into a scramble key portion and a data portion. Scrambling the data further includes pre computing and storing the scramble key portion. Scrambling the data further includes precomputing and storing the data portion. Scrambling the data further includes logically combining the precomputed scramble key portion with the precomputed data portion to produce a data bus width scrambled output data. The method further includes transmitting the scrambled output data over a network to the device under test.

Abstract: Methods, systems, and computer readable media for caching and using scatter list metadata to control DMA receiving of network protocol data are described. According to one method, metadata associated with partially used scatter list entries is cached in memory of a scatter list caching engine. Data to be written to host system memory is received. The scatter list caching engine provides the metadata associated with partially used scatter list entries to a DMA controller to control the DMA writing of the data into host system memory.