Starting to plan a project to switch my hosts over from 1GB to 10GB. Hosts are setup with 2 kernel ports in the same vSwitch for iSCSI traffic(a physical nic is active only on a single kernel port, ie vmnic7 is active in iSCSI, and 8 is active in the other). There is a seperate vSwitch for VMFT and vMotion traffic and setup in a similar fashion. I am under the assumption that when I add the 10GB cards to the hosts and power back up, I just add to the proper kernel ports and vSwitches as needed and I should see the SAN's LUNs.
here is a pic of a hosts iSCSI config.
Also, I know its probably not ideal to have the hosts on different speed connections, and should get all hosts switched over as quickly as possible. What are some possible problems if they are not the same for say, a month or so? I don't want to do more than one host in my weekend downtime window so with 4 hosts, this could take me a month to complete.