tag:blogger.com,1999:blog-1901204287565598927.post7706405953892420167..comments2022-03-31T21:12:02.805-05:00Comments on Fundamentally Geek: Slow Network Access Within Virtual Machines - Broadcom and Hyper-VClayhttp://www.blogger.com/profile/10725238177783568934noreply@blogger.comBlogger35125tag:blogger.com,1999:blog-1901204287565598927.post-13216254190513196272015-01-14T00:24:53.636-06:002015-01-14T00:24:53.636-06:00Thank you! If only I would have found this page ea...Thank you! If only I would have found this page earlier!<br /><br /><a href="http://www.whyq.me/" rel="nofollow">Queue Management</a> <br /><a href="http://www.whyq.me/" rel="nofollow">Virtual Queue</a>Anonymoushttps://www.blogger.com/profile/10489992021537440145noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-21517558289104978192014-06-26T16:00:15.666-05:002014-06-26T16:00:15.666-05:00That was exactly my problem as well. Thank you for...That was exactly my problem as well. Thank you for this article.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-50920750486046220962014-05-31T01:04:13.315-05:002014-05-31T01:04:13.315-05:00Full TCP offload engine works best with 10 gigabyt...Full TCP offload engine works best with 10 gigabytes Ethernet network adapters. 10G bit TCP offload technology designed for financial institutions like banks, data centers, stock exchanges etc.<br /><a href="http://intilop.com" rel="nofollow">10G bit tcp offload</a><br />Thanks for sharing nice or decent information..Intilophttps://www.blogger.com/profile/11644140760455910010noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-30882295464681923352014-04-26T12:22:47.854-05:002014-04-26T12:22:47.854-05:00THANK YOU! You've saved what was left of my h...THANK YOU! You've saved what was left of my hair. Brand new Dell PowerEdge T420 hardware, 4 Broadcom physical NICs, two guest VM's (each attached to a physical NIC through an External Virtual Switch), brand new out-of-the-box installs of Server 2012R2 and 2012R2 guest VM's, and getting 200+ms latency and about 3MB/s throughput. The second I disabled Virtual Machine Queues in the Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-13752916605191485872014-04-03T08:26:01.007-05:002014-04-03T08:26:01.007-05:00I love your post. it has a lot of information abou...I love your post. it has a lot of information about networking.<br />thanks for share here...<br /><a href="http://intilop.com" rel="nofollow">TCP Offload</a><br /><br />Intilophttps://www.blogger.com/profile/11644140760455910010noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-26046260508690895332014-03-08T03:35:27.904-06:002014-03-08T03:35:27.904-06:00There have been many different terms and concepts ...There have been many different terms and concepts associated with TCP offload and one of them is the 10G Bit TCP offload which has a significant role played in the entire process.<br /><a href="http://inti-lop.tumblr.com" rel="nofollow">TCP Offload IP core</a><br />Thanks for posting here.Intilophttps://www.blogger.com/profile/11644140760455910010noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-74476714700188626072014-02-28T13:32:22.166-06:002014-02-28T13:32:22.166-06:00I can't believe they haven't fixed their d...I can't believe they haven't fixed their driver after all this time. This fix still works!Anonymoushttps://www.blogger.com/profile/03052707973154049260noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-2650799415042278612014-02-28T13:32:05.888-06:002014-02-28T13:32:05.888-06:00I can't believe they haven't fixed their d...I can't believe they haven't fixed their driver after all this time. This fix still works!Anonymoushttps://www.blogger.com/profile/03052707973154049260noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-19868147722823187932014-02-18T00:28:50.874-06:002014-02-18T00:28:50.874-06:00ThanksThanksSSD VPShttp://ssdvps.comnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-3771704409214233262014-01-08T16:17:39.835-06:002014-01-08T16:17:39.835-06:00Add another happy reader of your solution -- much ...Add another happy reader of your solution -- much thanks. It solved my issue. <br /><br />I have multiple WS 2012 with Hyper-V hosts and most of the guests have run OK -- because I used the built-in NIC driver, not Broadcom's. The one with the Broadcom driver had VMQ enabled, and even though it was disabled in Hyper-v, it still caused slowness. With VMQ enabled on HyperV and the NIC, it Mark Bnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-57188335433290108632013-12-16T14:42:07.646-06:002013-12-16T14:42:07.646-06:00No one has yet to ask why Broadcom or Microsoft ha...No one has yet to ask why Broadcom or Microsoft hasn't addressed this issue. It is obvious so many people have wasted their time with this issue. I spent a solid few hours trying to adjust settings, then another few hours trying to find something online, then finally found a related post. It's sad someone doesn't actually FIX the issue. Broadcom's driver should obviously Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-4281482609217244422013-11-28T19:18:48.108-06:002013-11-28T19:18:48.108-06:00The VMQ was the issue in my case and my Host OS is...The VMQ was the issue in my case and my Host OS is 2012 R2 with 2008 R2 guest. turned off the VMQ on the virtual switch interface and my network came alive.<br /><br />ThanksCharlie Wienernoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-87946037753184363172013-10-08T23:46:04.533-05:002013-10-08T23:46:04.533-05:00The real issue here is a duplication of every pack...The real issue here is a duplication of every packet running through the VM switch. Wiresharking and pings under unix will result in DUP packets.<br /><br />Funny thing was I was unable to reproduce the issue with 1gb nic's but the issue was constant with 10gb broadcom nics; it's clearly a bug and disabling on VM's using alot of network IO will spike CPU. The feature is needed, but a Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-53132053160477343502013-09-26T12:44:20.269-05:002013-09-26T12:44:20.269-05:00Awesome post. My Server 2012 VMs were really slow ...Awesome post. My Server 2012 VMs were really slow running on a PowerEdge. It took six minutes to log into them via Remote Desktop. I turned off VMQ for the physical NICs as well as the VMS, and login was cut down to about six seconds.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-10525562313713230522013-08-27T17:14:43.561-05:002013-08-27T17:14:43.561-05:00Worked for me as well. Just to clarify, you'r...Worked for me as well. Just to clarify, you're talking about disabling Virtual Machine Queuing for the NIC used for VM's, but in the Device manager of the Host.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-52910457562204563722013-08-27T17:14:42.912-05:002013-08-27T17:14:42.912-05:00Worked for me as well. Just to clarify, you'r...Worked for me as well. Just to clarify, you're talking about disabling Virtual Machine Queuing for the NIC used for VM's, but in the Device manager of the Host.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-38225128851651640482013-08-06T16:05:13.034-05:002013-08-06T16:05:13.034-05:00I just resolved this same issue using your instruc...I just resolved this same issue using your instructions on a hyper-v machine with many guests. <br />I switched my vSwitch from External to internal, change my adapter settings as described, and then switched my vSwitch back to external on that same NIC. Worked like a charm, even on fully up systems with a 3 minute outage.<br />Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-25616997148371046742013-07-23T17:51:26.834-05:002013-07-23T17:51:26.834-05:00Thank you for posting this issue !!!
I am setting...Thank you for posting this issue !!!<br /><br />I am setting up a new Dell R520 server running Hyper-V and Windows Server 2012. The server's Broadcom gigabit adapters (2 LOM and 2 on a PCI card) are connected to a gigabit LAN, but network throughput to the VMs via the Hyper-V virtual switch was dismal, averaging less than 10 Kbps. Virtually unusable, pun intended. (I felt like it was 1980 Network Adminhttps://www.blogger.com/profile/02474114891718090919noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-12467678989808986252013-07-08T10:23:20.321-05:002013-07-08T10:23:20.321-05:00Haha thanks Ves, glad to hear this is helping peop...Haha thanks Ves, glad to hear this is helping people. I rarely post unless it's something I can't find elsewhere, so sorry about the lack of content here :pClayhttps://www.blogger.com/profile/10725238177783568934noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-83785761826203622352013-07-08T09:32:25.362-05:002013-07-08T09:32:25.362-05:00thanks worked for me and my voipswitch virtual mac...thanks worked for me and my voipswitch virtual machine<br /><br />will by you a pinte if you come by Paris France<br />Veshttps://www.blogger.com/profile/18036206690485270484noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-32035992959358511632013-07-05T08:26:23.708-05:002013-07-05T08:26:23.708-05:00Let me echo everyone else's comments and say.....Let me echo everyone else's comments and say....THANK YOU....solved my problems as well on a Dell R620.<br />The users were about to lynch me!!!<br /><br />Richard Duffy<br />SAP Business One Evangelist<br />SAPAnonymoushttps://www.blogger.com/profile/05795114551645522609noreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-51688807888516070602013-06-17T17:16:20.653-05:002013-06-17T17:16:20.653-05:00Thank you! If only I would have found this page ea...Thank you! If only I would have found this page earlier! Brand new Dell server.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-74331814044350644212013-06-06T08:37:22.336-05:002013-06-06T08:37:22.336-05:00Thank you! after all that google and testing... th...Thank you! after all that google and testing... this fix my VM network performance problems. Thanx!Buutteefnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-92101405616293294142013-05-17T12:35:25.200-05:002013-05-17T12:35:25.200-05:00I searched forever and only found the usual stuff ...I searched forever and only found the usual stuff about TCP offloading, etc. None of it did a thing. Found your post and instantly fixed the problem. Thanks so much, you saved my arse!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1901204287565598927.post-89432233354685549442013-05-17T09:13:49.867-05:002013-05-17T09:13:49.867-05:00Wow! I never would have found this without your h...Wow! I never would have found this without your help. Huge improvement! I was beginning to think that our new host machine was a lemon. Thank you, thank you, thank you!Anonymousnoreply@blogger.com