[libvirt-users] How to Position a Network Interface in Physical PCI Slot
Hi , I would like to assign a Network Interface card to Physical Slot X in the virtual machine, I have gone through the XML file definition[Now i have some idea on how to position the Network Interface in Logical PCI Slot.] I am NOT interested in using a PCI Pass-through from the Host. currently running Fedora 19 with libvirt 1.2.0 I would like to create an network interface card on Physical Slot 5 so all my network interfaces under the pci-bridge get detected as pci5px Regards Thiru
On 12/17/2013 08:02 AM, Thiru Murugan wrote:
Hi ,
I would like to assign a Network Interface card to Physical Slot X in the virtual machine,
I have gone through the XML file definition[Now i have some idea on how to position the Network Interface in Logical PCI Slot.]
What is logical slot X vs. physical slot X? There are only two PCI addresses associated with any PCI passthrough device (the slot on the host, and the slot on the guest), which you say you aren't interested in anyway, and there is only one PCI address associated with any emulated device - the slot on the guest, which is set with the <address> sub-element of any device. In general, whatever address you set there will be the location of the device on the guest, although I've heard some people mention that this isn't necessarily always the case, but depends on the guest OS.
I am NOT interested in using a PCI Pass-through from the Host.
currently running Fedora 19 with libvirt 1.2.0
I would like to create an network interface card on Physical Slot 5 so all my network interfaces under the pci-bridge get detected as pci5px
This should place the card in slot 5 of bus 0: <interface type=....> ... <address type='pci' domain='0' bus='0' slot='5' function='0'/> </interface> Showing up on a particular slot doesn't necessarily guarantee the name that will be given to the interface - that is completely up to the guest OS. For example, on my F19 hardware, I have an ethernet at bus=4 slot=0 function=0 which was given the name "p13p1", another at 4:0.1 which is "p13p2", and another that is integrated on the motherboard at 6:0.0 which is named "p32p1". On several F19 guests (some installed with F19 from scratch, at least one upgraded from F18), the network interfaces are all named ethX. I believe this is now somehow controlled by systemd, but I haven't had any need to learn the details.
Physical Slot - root@tchp2083 # dmidecode -t slot ~~~~~ Handle 0x0901, DMI type 9, 17 bytes System Slot Information Designation: PCI-E Slot 1 Type: x8 PCI Express Current Usage: In Use Length: Long ID: 1 Characteristics: 3.3 V is provided PME signal is supported Bus Address: 0000:07:00.0 Logical PCI Slot: root@tchp2083 # lspci -tv -[0000:00]-+-00.0 Intel Corporation 5520 I/O Hub to ESI Port +-01.0-[04]----00.0 Hewlett-Packard Company Smart Array G6 controllers +-02.0-[05]-- +-03.0-[11-14]----00.0-[12-14]--+-02.0-[13]--+-00.0 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | | \-00.1 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | \-04.0-[14]--+-00.0 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | \-00.1 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) +-09.0-[07-0a]----00.0-[08-0a]--+-02.0-[09]--+-00.0 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | | \-00.1 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | \-04.0-[0a]--+-00.0 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) | \-00.1 Intel Corporation 82571EB Gigabit Ethernet Controller (Copper) ~~~~ Equivalent Logical Slot for "Physical Slot 1 " is under domain 0x0000 ,Bus 0x00,Slot 0x09,Index[Bridge] 0x07 The Application has been hosted on VMware. To maintain a Standard ,the Application has Defined Network Interfaces [for LAN segregation/functions & automation] Currently I am trying to bring the Application on KVM,and the Network Interfaces have to be in a certain location for the Automation to work properly. I need to have these Network Interfaces -pci2p1,pci2p2 & pci3p1,pci3p2. Regards Thiru On Tue, Dec 17, 2013 at 8:08 PM, Laine Stump <laine@laine.org> wrote:
On 12/17/2013 08:02 AM, Thiru Murugan wrote:
Hi ,
I would like to assign a Network Interface card to Physical Slot X in the virtual machine,
I have gone through the XML file definition[Now i have some idea on how to position the Network Interface in Logical PCI Slot.]
What is logical slot X vs. physical slot X? There are only two PCI addresses associated with any PCI passthrough device (the slot on the host, and the slot on the guest), which you say you aren't interested in anyway, and there is only one PCI address associated with any emulated device - the slot on the guest, which is set with the <address> sub-element of any device. In general, whatever address you set there will be the location of the device on the guest, although I've heard some people mention that this isn't necessarily always the case, but depends on the guest OS.
I am NOT interested in using a PCI Pass-through from the Host.
currently running Fedora 19 with libvirt 1.2.0
I would like to create an network interface card on Physical Slot 5 so all my network interfaces under the pci-bridge get detected as pci5px
This should place the card in slot 5 of bus 0:
<interface type=....> ... <address type='pci' domain='0' bus='0' slot='5' function='0'/> </interface>
Showing up on a particular slot doesn't necessarily guarantee the name that will be given to the interface - that is completely up to the guest OS. For example, on my F19 hardware, I have an ethernet at bus=4 slot=0 function=0 which was given the name "p13p1", another at 4:0.1 which is "p13p2", and another that is integrated on the motherboard at 6:0.0 which is named "p32p1". On several F19 guests (some installed with F19 from scratch, at least one upgraded from F18), the network interfaces are all named ethX. I believe this is now somehow controlled by systemd, but I haven't had any need to learn the details.
participants (2)
-
Laine Stump -
Thiru Murugan