We have a host with 2 management vmkernel ports.

1st port is using the default TCP/IP stack and the 2nd port we just created is using a custom TCP/IP stack

Reference  – https://virtualizationreview.com/articles/2015/10/26/configure-multiple-tcpip-stacks-in-vsphere-6.aspx

vmkernel1 – 192.168.101.100/24 with a default GW of 192.168.101.1

vmkernel2 – 10.1.1.100/24 with a default GW of 10.1.1.1

esxi responds to pings on both IPs, management traffic is enabled on vmk1, when we try to enable management traffic on vmk2 we get Failed to save configuration for VMkernel NIC vmk2, as a matter of fact enabling any services on the vmk2 generates the same error message.

Any help is greatly appreciated!