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New: Bridged networking stopped working after yum update

Bug 76621 [email protected] 1 participant 10 messages May 21, 2014 – May 22, 2014 KVM

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#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=76621

Bug ID: 76621
Summary: Bridged networking stopped working after yum update
Product: Virtualization
Version: unspecified
Kernel Version: Very latest with Fedora 20 yum update 2014-05-21
Hardware: x86-64
OS: Linux
Tree: Fedora
Status: NEW
Severity: low
Priority: P1
Component: kvm
Assignee: [email protected]
Reporter: [email protected]
Regression: No

Hi KVM,

We just moved to KVM from VirtualBox and VmWare.

We like the performance improvement but now there is a small problem with bridged networking.

There is an easy workaround, just don't do "yum update". But I write this since others might get problems too.

The host machine is HP Z620, dual XEON, 70GB memory, Samsung SSD 840 EVO and Radeon HD5450

We are running Fedora 20 64 bit.

The guest machines are Windows XP converted from VmWare via VirtualBox to KVM.

We install Fedora, KVM and add the virtual machines and it works.

We did a "yum update" perhaps 3 weeks ago and were still fine.

After "yum update" last week the guest machines can no longer be reached from the network.

We have reinstalled and things work again and after update the problems happens again. So it is repeatable.

We think something has changed beween 3 weeks and 1 week ago that break the feature.

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This is what we did in more detail.

Standard Fedora from DVD

Add proxy setting in /etc/yum.conf.

yum install openssh-server
systemctl enable sshd.service
systemctl start sshd.service

yum install nano

yum install samba

nano /etc/samba/smb.conf

systemctl enable smb.service
systemctl start smb.service
systemctl enable nmb.service
systemctl start nmb.service

Turn off firewall and selinux

nano /etc/selinux/config
SELINUX=disabled

systemctl stop firewalld.service
systemctl disable firewalld.service

reboot

Install kvm

yum install @virtualization
yum install libvirt

systemctl start libvirtd

Add/Import virtual machines

Copy virtual machine images VirtualDeveloperMachines (VDM) and VitrualTestMachines (VTM) if they are not already on disk.
VDMs need two network interfraces one bridged an one NAT. VTMs need only NAT.

virt-manager

Create a NAT network atpcutest with a dhcp 192.168.4.101 to 132

Create new machine.
Give path to the image files
type Windows XP
Give VDMs 2 cores and 3096MB memory
Give VTMs 1 core and 1024MB memory
Set configure bofore install
Set start VM at boot
Set Disk driver to virtio
For VDMs add an extra NIC, Set one NIC to bridged em1 set other NIC to atpcutest
For VTMs set NIC to atpcutest
Both NICs as virtio
Set Grapchic as VMVGA

After booting VDMs set their static IPs (both)
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Doing the above work. Also after rebooting. After doing "yum update" 2014-05-21 it does not work.

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#1 lore raw

[Bug 76621] Bridged networking stopped working after yum update

https://bugzilla.kernel.org/show_bug.cgi?id=76621

Michael Tokarev <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------
CC| |[email protected]

--- Comment #1 from Michael Tokarev <[email protected]> ---
Please report this to fedora bugzilla. Not everyone is running fedora, and not everyone even understand what yum is. This problem is most likely qemu-related, not kernel, at least it has very small chance to have anything to do with kvm part of the kernel. And you completely failed to even mention the versions, from and to, of the components you upgraded.

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#3 lore raw

[Bug 76621] Bridged networking stopped working after yum update

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=76621

Henrik <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

     Kernel Version|Very latest with Fedora 20  |3.14.4-200.fc20 (Very
                   |yum update 2014-05-21       |latest with Fedora 20 yum
                   |                            |update 2014-05-21)
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author
#5 lore raw

[Bug 76621] Bridged networking stopped working after yum update

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=76621

Henrik <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

     Kernel Version|3.14.4-200.fc20 (Very       |3.14.4-200.fc20
                   |latest with Fedora 20 yum   |
                   |update 2014-05-21)          |
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