Re: [CentOS] Virtualization supporting 1000Mbps nics?
On Mon, Feb 14, 2011 at 2:34 PM, Smithies, Russell russell.smith...@agresearch.co.nz wrote: I’ve got xen-3.0.3-105.el5_5.5 running on Centos 5.5 and all is running smooth but I notice that any VMs running under it only have access to Realtek RTL8139C at 100 Mbps nics. In general, don't bother. Let the virtualization server handle all the cute features of the network interfaces, because it's going to *anyway* as part of its role translating the kernel operations of the virtualized driver into real hardware interactions with the NIC you actually use. We have 4 x 1G nics configured in a port channel so I’d really like to be able to give my VMs 1000Mbps nics. Actually test the performance, and if possible, use a para-virtualized kernel. You should see surprisingly good performance. Does anyone know if this is possible and how to do it? If not, does KVM support faster nics because at this point it would be fairly simple to change. See above. In reality, I'll be surprised if you don't easily outperform a physical RealTek device. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Virtualization supporting 1000Mbps nics?
I'm using the gplpv passthru driver now so it's using my nic directly rather than a virtual Realtek 100Mbps one and I'm getting much better transfer speeds - a recommendation from the Xen mailing list. Regularly getting 120Mbps drag and drop to a file share on a 2k8R2 server a thousand miles away. Was getting 25Mbps with the virtual Realtek. --Russell -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Nico Kadel-Garcia Sent: Wednesday, 16 February 2011 3:42 p.m. To: CentOS mailing list Subject: Re: [CentOS] Virtualization supporting 1000Mbps nics? On Mon, Feb 14, 2011 at 2:34 PM, Smithies, Russell russell.smith...@agresearch.co.nz wrote: I've got xen-3.0.3-105.el5_5.5 running on Centos 5.5 and all is running smooth but I notice that any VMs running under it only have access to Realtek RTL8139C at 100 Mbps nics. In general, don't bother. Let the virtualization server handle all the cute features of the network interfaces, because it's going to *anyway* as part of its role translating the kernel operations of the virtualized driver into real hardware interactions with the NIC you actually use. We have 4 x 1G nics configured in a port channel so I'd really like to be able to give my VMs 1000Mbps nics. Actually test the performance, and if possible, use a para-virtualized kernel. You should see surprisingly good performance. Does anyone know if this is possible and how to do it? If not, does KVM support faster nics because at this point it would be fairly simple to change. See above. In reality, I'll be surprised if you don't easily outperform a physical RealTek device. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos === Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. === ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Virtualization supporting 1000Mbps nics?
I've got xen-3.0.3-105.el5_5.5 running on Centos 5.5 and all is running smooth but I notice that any VMs running under it only have access to Realtek RTL8139C at 100 Mbps nics. We have 4 x 1G nics configured in a port channel so I'd really like to be able to give my VMs 1000Mbps nics. Does anyone know if this is possible and how to do it? If not, does KVM support faster nics because at this point it would be fairly simple to change. Thanx, Russell Smithies === Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. === ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Virtualization supporting 1000Mbps nics?
I notice that any VMs running under it only have access to Realtek RTL8139C at 100 Mbps nics. In kvm, you have the option to use e1000 or the pv drivers. You can probably specify another nic in xen, but you'll have to research which it supports. Just make sure you retain the mac address, or the OS will see it as a new nic.. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
