ESXi host Purple Screen of Death (PSOD) happens when VMkernel experiences a critical failure. This can be due to hardware issues, driver problems, etc. During the PSOD event, the ESXi hypervisor captures a core dump to help diagnose the cause of the failure. Here’s what happens during this process.
List devices
esxcli storage core device list
Get S.M.A.R.T information
[root@esx24:~] esxcli storage core device smart get -d t10.NVMe____KINGSTON_SNVS1000GB_____________________55FA224178B72600
[root@esx24:~] esxcli storage core device smart get -d eui.0000000001000000e4d25c0f232d5101
The output looks like this
VMware KB: https://knowledge.broadcom.com/external/article/314303/displaying-smart-data-for-nvme-devices-i.html
sudo dnf -y groupinstall "Xfce"
sudo systemctl set-default graphical.target
List VMs and their uplinks.
netdbg vswitch instance list
Capture DHCP traffic (udp 67, udp 67) n vmnic0 interface and send it to tcpdump to filter DHCP communication.
pktcap-uw --uplink vmnic1 --capture UplinkRcvKernel,UplinkSndKernel -o - | tcpdump-uw -r - udp port 67 or udp port 68
This is the tcpdump command to display attempts to open TCP connections (TCP SYN) from IP address 192.168.123.22
pktcap-uw --uplink vmnic4 --capture UplinkRcvKernel,UplinkSndKernel -o - | tcpdump-uw -r - 'src host 192.168.123.22 and tcp[tcpflags] & tcp-syn != 0 and tcp[tcpflags] & tcp-ack == 0'
-n → Do not resolve hostnames.-i <interface> → Specify the network interface (e.g., eth0).'src host 192.168.123.22' → Filter packets from the source IP 192.168.123.22.'tcp[tcpflags] & tcp-syn != 0' → Match packets where the SYN flag is set.'tcp[tcpflags] & tcp-ack == 0' → Ensure the ACK flag is not set (to exclude SYN-ACK responses).
Source: https://nvidianews.nvidia.com/