In vSphere 4.x we have Three types of port groups:
1. Virtual Machine.
2. VMKernal Port Group.
3. Service Console Port Group.
In vSphere 5.x we have two types of port groups:-
- Virtual Machine-> for passing VM traffic.
- VMKernal Port Group-> The VMKernal TCP/IP stack handles traffic for the following ESXi Servers: vSphere, VMotion, Fault Tolerance, iSCSI, NFS and host management.
In the VMotion port group label the N/W name carefully as it is case sensitive. If you fail to label the name of the N/W correctly the whole VMotion N/W fails.