Server of the UCS for retransmission of CUCM/UnityCnx/UCCX cause

I installed CUCM, UnityCnx and UCCX using VMware 4.1 on a server C210M UCS. I thought that the web interface has been a bit slower to change between menus than we have on a physical server, but do not think it was too bad. The real problem was found when I tried to upgrade the 3 comments UC systems. I see the continuous transmissions between the SFTP server and servers CUCM, UnityCnx and UCCX. It takes a long time to upgrade systems because of the broadcast. Anyone else see this issue?

Not specific broadcasts, no..  But they are just an indicator of another problem somewhere.  Don't know what you have, never saw your environment, don't know you from Adam.  But if you are running 4.1 with comments of the CPU, then you must be aware of the TCP LRO problem if you're not already.  LRO is enabled by default and it is fixed now with a new patch, but in 4.1 before the hotfix will stop the vast "TCP" usually in the form of poor performace TCP as a general statement.  This may cause retransmissions among many other things of course.  Here is the link to turn off RSO on our guests and to restore back to normal TCP transmissions, will it affect you in the first place.  You mention that you fixed LRO known issue before indicating a tcp problem, so I'll post it on the assumption that you specifically called a tcp-based protocol and no udp based.

Good luck, let me know if she takes care of it.

http://docwiki.Cisco.com/wiki/Disable_LRO

Tags: Cisco DataCenter

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