search for: jumbo

...TU 1500 = 116.34 MB/s MTU 3000 = 103.42 MB/s MTU 4000 = 102.52 MB/s I was actually planning to do 1500, 3000, 4500, 6000 and 7200. However, I was surprised to discover although I had two seemingly identical Realtek PCI-E nics, the sending NIC could only go up to 4K. I'm wondering, that since Jumbo Frames was supposed to be better for bulk transfers, why am I seeing these results? Is it the ElRepo drivers I used to enable higher MTUs or possibly some kind of oddity with the realtek NICs I am using? Or am I mistaken about the benefits of jumbo frames and that they are only beneficial in specif...

Hi, I am trying to optimize my gigabit network. I have two Intel 1000 MT Gigabit Server Adapters, which support Jumbo Frames -- as well as a Switch that supports Jumbo Frames. However, I am observing some strange behavior in my file transfers from Windows XP to Linux and I am wondering if it has anything to do with the way the Samba variables are set on my Linux box? The "strange behavior" is that w...

We are utilizing the xen hypervisor on nexenta with ISCSI as our method of communication with the guests (currently ubuntu but could be moving to centos). Obviously jumbo packet support would be nice to have. The last time I see that on the xen roadmap http://wiki.xensource.com/xenwiki/XenRoadMap . Is there a canonical place that spells out if jumbo frames are now supported or still on the todo list? Thanks! _______________________________________________ Xen-...

Hi, Has anyone using CentOS 6 been able to successfully set an mtu larger than 9710 on an interface. I am seeing super jumbo frames with length > 10000. ... IP 10.79.4.53.64327 > 10.79.2.53.24294: Flags [.], seq 16060:29200, ack 1, win 32767, length 13140 ... CentOS release 6.7 (Final) Thanks, -- Stephen Clark *NetWolves Managed Services, LLC.* Director of Technology Phone: 813-579-3200 Fax: 813-882-0209 Email:...

...settings) everything works (slowly, but works). If I increase the MTU the aoe device appear as expected, but the data on it becomes inaccessible, even just trying to activate the lvm volume groups gives a bunch of IO errors at sector 0, and so on. Please tell me what I''m doing wrong. Are jumbo frames expected et all to work? Cheers Geza _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

..., Gordon Messmer wrote: > On 11/09/2015 08:34 AM, Steve Clark wrote: >> Has anyone using CentOS 6 been able to successfully set an mtu larger >> than 9710 >> on an interface. > Maximum frame size varies from implementation to implementation: > http://pages.uoregon.edu/joe/jumbo-clean-gear.html > > It's also worth noting that that due to offloading features in modern > NICs, there's often very little benefit to large frames. Since you > *really* need all of the devices on any network segment to use the same > MTU, the best option might be to eliminat...

The documentation says the bridge will work as far as all interfaces have the same MTU, but I also read on this and other mailing lists people having problems when using jumbo frames. What is the current status of jumbo frames support in the bridge? It could also be useful to have the same info on the wiki page. Thanks. -- Luca Lesinigo -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.linux-foundation.org/pipermail/bridge/...

On the network theme again. The adapters on the management/storage network all default to an mtu of 1500. Are there plans to be able to indicate when a network supports jumbo frames? Cheers, Justin.

...connection unexpectedly closed (8 bytes received so far) [receiver] rsync error: unexplained error (code 255) at io.c(459) [receiver=2.6.8] I'm using rsync 2.6.8 on both ends and never had this problem before until I changed the mtu. Anyone know of a way to fix this or does rsync not work with jumbo frames? Thanks, - Jake

When using OCFS2 in a Oracle RAC set, one would configure OCFS2 to use the private interconnect address ( in cluster.conf). Are there any known issues / reasons not to have the private interconnect set up for jumbo frames when using in conjunction with OCFS2 ? Thanks -- -------------- next part -------------- An HTML attachment was scrubbed... URL: http://oss.oracle.com/pipermail/ocfs2-users/attachments/20090526/b5cfa9a9/attachment.html

Hi, Increasing MTU beyond 1500 in Linux dom0 results in ooopses. I did not find any statement whether 2.0 series support jumbos or not in dom0. Does it? TIA, Teemu -- _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users

Hi everyone, I have looked through the list archives and seen a few posts about jumbo frame support, but there is no definitive answer on whether or not it has been tested or is working for anyone. I tried using an MTU of 9000 in a domU and encountered some very interesting and not-so-great results. My machines used in this test are: * NFS (physical) * dom0 (physical) * do...

...out the pci=nomsi kernel option > from being effective. > > I had one server booted with that option as well as MTU 1500. It was > stable for quite a long time, so I decided to try turning the MTU back > to 9000 and within 12 hours, the interface on the expansion NIC with the > jumbo MTU failed. > > The other NIC in the LACP bundle is onboard and didn't fail. The other > NIC on the dual-port expansion card also didn't fail. This leads me to > believe that ONE of the bugs I'm experiencing is related to 82575EB + > jumbo frames. > > I still th...

...nied ifnet: symbol not defined [site@Eden ~]$ netstat -an [site@Eden ~]$ netstat -m 377/823/1200 mbufs in use (current/cache/total) 64/378/442/32768 mbuf clusters in use (current/cache/total/max) 64/315 mbuf+clusters out of packet secondary zone in use (current/cache) 2/386/388/12800 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 230K/2505K/2736K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0...

..., a dd >> (r/w) on the storages attached gives 90 MB/s on the 1Gbit ISCSI (Source >> Server) and up to 600MB/s on the 10Gbit ISCSI (Destination Server) >> storage. >> >> Both servers have plenty of memory and cpu usage looks low. >> >> Currently we dont use jumbo frames. Network over all usage is moderate >> to low. There are no special sysctl tweeks yet in use. >> >> As mentioned, I'm confused that even with SMB I do get 3 to 4 times >> better performance. >> >> Any hint and suggestion to track that problem down is w...

On 11/09/2015 08:34 AM, Steve Clark wrote: > > Has anyone using CentOS 6 been able to successfully set an mtu larger > than 9710 > on an interface. Maximum frame size varies from implementation to implementation: http://pages.uoregon.edu/joe/jumbo-clean-gear.html It's also worth noting that that due to offloading features in modern NICs, there's often very little benefit to large frames. Since you *really* need all of the devices on any network segment to use the same MTU, the best option might be to eliminate jumbo frames (and t...

We have a cluster (212 nodes) that are on a gig-e network useing jumbo frames (mtu 6000) To reload a node we have to plug it into a regular 1500 mtu that is running off a differnt port on the head node to install. Is there a way to tell in the 'append' line of /pxelinux.cfg/default to have the bcm5700 module run wiht jumbo frames. this is our append right n...

I would like to use jumbo frame for local interfaces, but I am not sure in which order to set it up. Should it be set on the physical interface first, then on the bridge and on the guest, or in another way? On some servers there are configurations with vlan on the bridge

Author: mabloom Repository: /hg/zfs-crypto/gate Revision: 39c5623029b347adbf2ab92400d25328f7b321ee Log message: 5084264 Error messages output when configure jumbo frames using bge.conf Files: update: usr/src/uts/common/io/pci_pci/pci_pci.c

Hi, ¿ I would like to know how can I use Gigabit Jumbo Frames inside Xen ? I''ve set my eth0 and peth0 mtu to 7000 My question is : Do I should set the mtu inside each domU ? Regards _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users