This post explains how you can troubleshoot network problems by capturing network traces of ESXi host by using the tcpdump-uw and pktcap-uw utility. The pktcap-uw tool is an enhanced packet capture and analysis tool that can be used in place of the legacy tcpdump-uw tool. The pktcap-uw tool is included by default in ESXi 5.5 and later. This post explains the main differences of both tools and how to use them.
tcpdump-uw vs. pktcap-uw - It's not the same!
Capabilities of tcpdump-uw and pktcap-uw
The tcpdump-uw utility captures traffic from VMkernel adapters. The pktcap-uw utility, introduced in ESXi 5.5 can capture traffic that flows through physical network adapters, VMkernel adapters, and virtual machines adapters.
But it's more complex...
Read More »ESXi Network Troubleshooting with tcpdump-uw and pktcap-uw