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When I use NIC model rtl8139, I have a lot collisions and very low transfer.
I tested that with brctl and Open vSwitch, because I thought that was a vSwitch
issue.
When I change NIC model to virtio all works as expect.
Host: Ubuntu 16.04.2 LTS
Guest: Ubuntu 14.04.5 LTS - affected
Guest: Ubuntu 16.04.2 LTS - not affected
QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.10)
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
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qemu 2.5 network model rtl8139 collisions Ubuntu 16.04.2 LTS
https://bugs.launchpad.net/bugs/1682681
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