USB physical port mapping: Mistake in Proxmoxwiki?

[fireon]

Hi,

I've added some usbdongel to an windowsguest. But the description from the wiki: http://pve.proxmox.com/wiki/USB_physical_port_mapping
looks not correct. When i testet Option

usb0: host=3-1

It show me an wrong device. But when ein do something like this:

usb0: host=0e50:0002

It works pretty good.

Greetings
fireon

 

[giner]

Hi,

I've added some usbdongel to an windowsguest. But the description from the wiki: http://pve.proxmox.com/wiki/USB_physical_port_mapping
looks not correct. When i testet Option

usb0: host=3-1

It show me an wrong device. But when ein do something like this:

usb0: host=0e50:0002

It works pretty good.

Greetings
fireon

> usb0: host=0e50:0002
That connects usb device to a VM but not a specific physical port.

> usb0: host=3-1
this maps the specific physical port to a VM

 

[fireon]

So you mean the USBport from the host is after that only for this "one" VM?

 

[giner]

So you mean the USBport from the host is after that only for this "one" VM?

Main reason to use physical port mapping is to connect several usb devices those have same IDs to different virtual machines.

 

[snowman66]

See: man qm

-usb[n]    host=HOSTUSBDEVICE

                    Configure an USB device (n is 0 to 4). This can be used to
                    pass-through usb devices to the guest. HOSTUSBDEVICE syntax
                    is:

                    '[B]bus-port[/B]' (decimal numbers) or
                    '[B]vendor_id[/B]:[B]product_id[/B]' (hexadeciaml numbers)

                    You can use the 'lsusb -t' command to list existing usb
                    devices.

                    Note: This option allows direct access to host hardware. So it
                    is no longer possible to migrate such machines - use with
                    special care.

 

[giner]

See: man qm

-usb[n]    host=HOSTUSBDEVICE

                    Configure an USB device (n is 0 to 4). This can be used to
                    pass-through usb devices to the guest. HOSTUSBDEVICE syntax
                    is:

                    '[B]bus-port[/B]' (decimal numbers) or
                    '[B]vendor_id[/B]:[B]product_id[/B]' (hexadeciaml numbers)

                    You can use the 'lsusb -t' command to list existing usb
                    devices.

                    Note: This option allows direct access to host hardware. So it
                    is no longer possible to migrate such machines - use with
                    special care.

When I say physical port mapping to a VM I mean not just host port mapping to a VM but "one specific physical port" to "one port in VM".