Hi
1)What is the supported Vmware tools version for 11.6(2) ?. If there clear matrix anywhere
VMware Tools are specialized drivers for virtual hardware that is installed in the UC applications when they are running virtualized. It is very important that the VMware tools version running in the UC application be in sync with the version of ESXi being used.
If VMware tools status does not show "OK" from the viClient, the VMware Tools must be upgraded.
It is important to understand that the UC application is not tied to the version of ESXi it is running on. For example, initial deployment of the OVA and UC application may have been done on ESXi 4.0 update 1. Then at a later time, you may upgrade the ESXi software to version 4.1 or migrate the vm to a host running ESXi 4.1 - once running on the different ESXi version, you will need to upgrade the VMware Tools running in your UC application to match the host it is running on. Software upgrades of the UC application will preserve the version of VMware Tools currently running.
The Vmware tools version needs to match with your ESXi version you can find this information from here
https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/uc_system/virtualization/virtualization-software-requirements.html#method2
2) When going from 11.5 to 11.6(2) is COP file required?
The simple answer is You don't need a COP file (Make sure that you have enough disk space to accommodate the new version, if there is not enough disk space you might want to free up some space)
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_11_6/install/guide/uccx_b_unified-ccx-install-upgrade-guide/uccx_b_unified-ccx-install-upgrade-guide_chapter_0100.html#UCCX_TK_ACBB36E8_00
check upgrade Scenarios in the above DOC.
3) When going from 11.5 to 11.6(2) do we have to change the NIC adapter type?
I don't think so as yours is not a refresh upgrade, You might want to check the RHEL version being used if the RHEL version is same you don't have to change the NIC settings, this is normally required
when the RHEL version changes
