Does the ESXi Host have a vmkernel port configured on the 192.168.1.x network or just a Virtual Machine Port Group?
If the ESXi does not have a vmkernel port on the 192.168.1.x network then you will not be able to ping it.
Calvin Scoltock
VCP 2.5, 3.5, 4, 5 & 6
VCAP5-DCD
VCAP5-DCA
http://pelicanohintsandtips.wordpress.com/blog
LinkedIn: https://www.linkedin.com/in/cscoltock