Use the pktcap-uw utility to trace the path that packets traverse in the network stack for latency analysis and for locating the point where a packet is corrupted or dropped. Trace Packets by Using the pktcap-uw Utility.If all of the packets passing over a network are captured, the resulting storage file can become very large very quickly. Full packet capture takes the whole packet. Traffic travels in packets that include a data payload and a header. Capturing Packets by Using the pktcap-uw UtilityĬapture packets through the pktcap-uw utility in the path between a virtual switch and the physical adapters, VMkernel adapters and virtual machine adapters to troubleshoot data transfer in the network stack on an ESXi host. Packet capture involves copying segments of network traffic.
Narrow the range of packets that you monitor by using the pktcap-uw utility to apply filtering options for source and destination address, VLAN, VXLAN, and next level protocol consuming the packet payload. pktcap-uw Options for Filtering Packets.Use the options for output control of the pktcap-uw utility to save packet contents to a file, capture up to a certain number of bytes from each packet, and limit the number of captured packets. Use the pktcap-uw utility to view the path of a packet in the network stack on an ESXi host for latency analysis. pktcap-uw Command Syntax for Tracing Packets.Use the pktcap-uw utility to inspect the contents of packets while they traverse the network stack on an ESXi host. pktcap-uw Command Syntax for Capturing Packets.The options of the utility might change in the future. Pktcap-uw utility is not fully supported for backward compatibility across vSphere releases.
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