CentOS-6.2
We have a dedicated CentOS-5.7 host used for fax reception
and transmission that we wish to move to a CentOS-6.2
virtual guest instance. The CentOS-6.2 virtual host has a
4-port serial card installed.
lspci -v tshows this this:
03:00.0 Serial controller: Oxford Semiconductor Ltd
OX16PCI954 (Quad 16950 UART) function 0 (Uart) (prog-if 06
[16950])
Subsystem: Oxford Semiconductor Ltd Device 0000
Flags: medium devsel, IRQ 17
I/O ports at d040 [size=32]
Memory at d0702000 (32-bit, non-prefetchable)
[size=4K]
I/O ports at d020 [size=32]
Memory at d0701000 (32-bit, non-prefetchable)
[size=4K]
Capabilities: [40] Power Management version 2
Kernel driver in use: serial
setserial -g /dev/ttyS* shows this:
/dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4
/dev/ttyS1, UART: 16950/954, Port: 0xd040, IRQ: 17
/dev/ttyS2, UART: 16950/954, Port: 0xd048, IRQ: 17
/dev/ttyS3, UART: 16950/954, Port: 0xd050, IRQ: 17
But, in virt-manage, when I try to add a serial device to
the guest as the physical character device /dev/ttyS1 I
get this error and the device is not added.
XML error: unknown device type
Traceback (most recent call last):
File
"/usr/share/virt-manager/virtManager/addhardware.py",
line 1026, in add_device
self.vm.attach_device(self._dev)
File "/usr/share/virt-manager/virtManager/domain.py",
line 698, in attach_device
self._backend.attachDevice(devxml)
File "/usr/lib64/python2.6/site-packages/libvirt.py",
line 400, in attachDevice
if ret == -1: raise libvirtError
('virDomainAttachDevice() failed', dom=self)
libvirtError: XML error: unknown device type
We wish to have at least two, preferably three, andf
ideally all four, serial ports enabled on the virtual
guest. Does anyone know how this is accomplished?
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
Hi James, You should try to make a PCI pass-through for your multiport serial card in virt-manager. Although I haven't tried this kind of configuration, I think that this should be the right way to make such setup. You'll need driver for this PCI card within your guest OS. On 01/31/2012 08:01 PM, James B. Byrne wrote:> CentOS-6.2 > > We have a dedicated CentOS-5.7 host used for fax reception > and transmission that we wish to move to a CentOS-6.2 > virtual guest instance. The CentOS-6.2 virtual host has a > 4-port serial card installed. > > lspci -v tshows this this: > > 03:00.0 Serial controller: Oxford Semiconductor Ltd > OX16PCI954 (Quad 16950 UART) function 0 (Uart) (prog-if 06 > [16950]) > Subsystem: Oxford Semiconductor Ltd Device 0000 > Flags: medium devsel, IRQ 17 > I/O ports at d040 [size=32] > Memory at d0702000 (32-bit, non-prefetchable) > [size=4K] > I/O ports at d020 [size=32] > Memory at d0701000 (32-bit, non-prefetchable) > [size=4K] > Capabilities: [40] Power Management version 2 > Kernel driver in use: serial > > > setserial -g /dev/ttyS* shows this: > > /dev/ttyS0, UART: 16550A, Port: 0x03f8, IRQ: 4 > /dev/ttyS1, UART: 16950/954, Port: 0xd040, IRQ: 17 > /dev/ttyS2, UART: 16950/954, Port: 0xd048, IRQ: 17 > /dev/ttyS3, UART: 16950/954, Port: 0xd050, IRQ: 17 > > > But, in virt-manage, when I try to add a serial device to > the guest as the physical character device /dev/ttyS1 I > get this error and the device is not added. > > XML error: unknown device type > > Traceback (most recent call last): > File > "/usr/share/virt-manager/virtManager/addhardware.py", > line 1026, in add_device > self.vm.attach_device(self._dev) > File "/usr/share/virt-manager/virtManager/domain.py", > line 698, in attach_device > self._backend.attachDevice(devxml) > File "/usr/lib64/python2.6/site-packages/libvirt.py", > line 400, in attachDevice > if ret == -1: raise libvirtError > ('virDomainAttachDevice() failed', dom=self) > libvirtError: XML error: unknown device type > > We wish to have at least two, preferably three, andf > ideally all four, serial ports enabled on the virtual > guest. Does anyone know how this is accomplished?
On Tue, 2012-01-31 at 14:01 -0500, James B. Byrne wrote:> CentOS-6.2 > > We have a dedicated CentOS-5.7 host used for fax reception > and transmission that we wish to move to a CentOS-6.2 > virtual guest instance. The CentOS-6.2 virtual host has a > 4-port serial card installed.Consider replacing your multi-serial port card with a VoIP analog gateway and use a pre-rolled Asterisk with virtual faxmodems, like Elastix. Just make sure your codec is high enough quality. We used to receive faxes using a dedicated Linux box with a Comtrol Rocketport and an USRobotics MP8. We Converted to SIP trunks and managed to get our faxes in the SIP trunks, as well. This will remove the PCI pass-through from the equation.
On Wed, February 8, 2012 11:06, Ed Heron wrote:> On Tue, 2012-01-31 at 14:01 -0500, James B. Byrne wrote: >> CentOS-6.2 >> >> We have a dedicated CentOS-5.7 host used for fax >> reception >> and transmission that we wish to move to a CentOS-6.2 >> virtual guest instance. The CentOS-6.2 virtual host has >> a >> 4-port serial card installed. > > Consider replacing your multi-serial port card with a > VoIP analog > gateway and use a pre-rolled Asterisk with virtual > faxmodems, like > Elastix. Just make sure your codec is high enough > quality. We used to > receive faxes using a dedicated Linux box with a Comtrol > Rocketport and > an USRobotics MP8. We Converted to SIP trunks and managed > to get our > faxes in the SIP trunks, as well. > > This will remove the PCI pass-through from the equation. >After a brief read this seems to me the approach we should take. Recently I have discovered more about irqs, timing delays, and the difficulties/impossiblities of switching hardware from vm instances than I ever wanted to know. Given that we have three dedicated fax lines and 6 voice is there any hardware that would you suggest for a 4 core x86_64 Intel based host system? We have looked at going completely to v/f-oip but I do not have the time to deal with those intricacies and get this move completed at the same time. So, for the nonce it appears that we would have to employ an FXO gateway to connect our existing POTS lines to the host. -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB at Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3
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