XENNET(4) BSD/xen Kernel Interfaces Manual XENNET(4)NAME
xennet -- Xen frontend paravirtualized network interface
SYNOPSIS
xennet* at xenbus?
DESCRIPTION
The xennet interface forms the frontend part of the paravirtualized drivers used by Xen guest domains to have network connectivity.
When the host domain is NetBSD, the endpoint of the xennet interface is a xvif(4) interface. In the XenStore, xvif and xennet are identified
by ``vif'' (virtual interface) entries.
Conceptually, frontends and backends drivers are similar to two Ethernet cards connected via a crossover cable.
DIAGNOSTICS
xennet%d: can't read mac address, err %d The MAC address for this interface could not be read from XenStore.
xennet%d: %s is not a valid mac address The MAC address specified in the configuration file of the newly created guest domain is invalid.
xennet%d: using event channel %d The Xen event channel (virtual interrupt) ID associated to this xennet.
xennet%d: using RX copy mode The xennet and its associated endpoint use copy mode for communication: packets are copied from one domain's
memory to another.
xennet%d: using RX flip mode The xennet and its associated endpoint use flip mode for communication: packets are passed by remapping memory
pages between domains.
SEE ALSO ifmedia(4), xenbus(4), xvif(4), ifconfig(8)HISTORY
The xennet driver first appeared in NetBSD 3.0.
AUTHORS
The xennet driver was written by Manuel Bouyer <bouyer@NetBSD.org> and Christian Limpach <chris@pin.lu>.
BSD January 8, 2011 BSD
Check Out this Related Man Page
PCIBACK(4) BSD/xen Kernel Interfaces Manual PCIBACK(4)NAME
pciback -- Xen backend paravirtualized PCI pass-through driver
SYNOPSIS
pciback* at pci?
DESCRIPTION
The pciback driver is the backend part of the PCI pass-through functionality that can be used by the Xen dom0 to export pci(4) devices to a
guest domain. To export a PCI device to a guest domain, the device has to be attached to pciback in the dom0.
When the guest domain is NetBSD, the device attached to the pciback driver will attach to a xpci(4) bus inside the guest domain.
EXAMPLES
To attach a device to the pciback driver, follow these steps:
1. look for the device PCI ID, via pcictl(8).
2. edit boot.cfg(5) and add the PCI ID to the list of PCI IDs that you want to attach to pciback, in bus:device.function notation.
The list is passed to dom0 module via the pciback.hide parameter:
pciback.hide=(bus:dev.fun)(bus:dev.func)(...)
See also boot(8).
3. reboot dom0.
4. add the PCI ID to the list of PCI devices in the domain configuration file:
pci = ['bus:dev.fun', '...']
5. start the guest domain.
SEE ALSO pci(4), xpci(4), boot(8), pcictl(8)HISTORY
The pciback driver first appeared in NetBSD 5.1.
AUTHORS
The pciback driver was written by Manuel Bouyer <bouyer@NetBSD.org>.
CAVEATS
Currently, to attach a device to the pciback backend, this procedure has to be performed at boot(8) time. In the future, it will be possible
to do it without requiring a dom0 reboot.
SECURITY CONSIDERATIONS
As PCI passthrough offers the possibility for guest domains to send arbitrary PCI commands to a physical device, this has direct impact on
the overall stability and security of the system. For example, in case of erroneous or malicious commands, the device could overwrite physi-
cal memory portions, via DMA.
BSD January 8, 2011 BSD
All,
I have a need to software change the MAC address of a NIC in a Sparc Ultra 10 - I believe there is a command that allows to do this at boot up?
Is it a missing (to me) part of ifconfig ?
If so, what is the syntax?
All replies gratefully received !
Thanks
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