There seems to be conflicting information on if/when this is needed. Here is the VMWare KB article stating that disabling LRO is not required on ESXi 5.0:
From that page: This issue has been resolved in ESX/ESXi 4.1 Update 2. For more/related information, see VMware ESX 4.1 Update 2 Release Notes This issue does not affect Linux virtual machines on ESXi 5.0
We need all of these sites to alignb and have correct inso. If the KB is incorect, and LRO must be disabled on 5.0, please make an explicit remark that our Wiki is intentionally contradicting the vmware site.
12/17/2012 Excerpt from the Cisco support community: https://communities.cisco.com/message/103627
Link indicates that LRO is not required for some versions of CUCM:
- UCM 8.0 on vSphere 4.1 or 5.0 or higher - DISABLE LRO
- UCM 8.5 on vSphere 4.1 or 5.0 or higher - DISABLE LRO
- UCM 8.6 on vSphere any - do NOT need to disable LRO
- UCM 9.0 and future on vSphere any - do NOT need to disable LRO
I opened a Cisco TAC case 624198237 and the engineer I spoke with also confirmed this information to be correct.Please update the docwiki to reflect new data regarding LRO.