Hello Frank,
Get the Output of the below commands
1)[root@esxi-01a:~] esxcfg-nics -l
2)[root@esxi-01a:~] vmkchdev -l | grep -i vmnic0
3)[root@esxi-01a:~]esxcli network nic get -n vmnicX
And please attach the vobd.log from non working host.
You can try the belwo command to see if you are able to change the SPeed to 10k form 1k
[root@esx-01a:~] vim-cmd hostsvc/net/pnic_setlinkspeed vmnicX --linkspeed-mb 10000 --linkspeed-duplex true
After changing the speed can check the changes are enforced
[root@esxi-01a:~] esxcfg-nics -l