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Re: [libvirt-users] Dump network traffic from each VM.

On Wed, May 04, 2016 at 12:37:14PM -0300, Julio Faracco wrote:
> Hi guys,
> Does anybody know how to dump the network trafic from each virtual
> machine using libvirt?
> Here, we usually use VPN softwares and other network tools inside
> Virtual Machines (Windows and Linux). Sometimes, this applications
> does not work properly, so we need to dump the network traffic of each
> Virtual Machine to compare and debug.
> How can I enable it using libvirt? I know that if you use a QEMU
> instance, you can enable the dump using "-netdev dump,...".

Libvirt does not support the QEMU netdev dump feature at this time.

Best bet is to just connect tcpdump to the TAP device associated
with the virtual machine in question. See the XML config for the
name of the currently assigned TAP device

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