[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[ChristianEhrhardt]

** Changed in: qemu-kvm (Ubuntu)
   Status: Incomplete => Invalid

** Changed in: openstack (Ubuntu)
   Status: New => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[ChristianEhrhardt]

Hi Thiago,
sorry the size of the last update was rather huge.
Re-quoting the TL;DR section of it to make sure you see the status update - 
read the full comment for details:

TL;DR: working for me, please help understanding your issue by:
1. share your network configuration xmls
2. Try with a recent Ubuntu image to rule out cirros
3. share your guest network config for those interfaces
Note: As it might have been arch specific this test has been done on a Power8E 
machine.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[bugproxy]

--- Comment From tme...@br.ibm.com 2017-01-30 10:28 EDT---
Do we have any update on this bug?

** Tags added: bugnameltc-149773 severity-high

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[ChristianEhrhardt]

TL;DR: working for me, please help understanding your issue by:
1. share your network configuration xmls
2. Try with a recent Ubuntu image to rule out cirros
3. share your guest network config for those interfaces
Note: As it might have been arch specific this test has been done on a Power8E 
machine.

Trying to isolate the Qemu net part
Vivid
-netdev tap,fd=23,id=hostnet0
-device 
virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:bd:8f:4f,bus=pci.0,addr=0x1
-netdev tap,fd=24,id=hostnet1
-device 
virtio-net-pci,netdev=hostnet1,id=net1,mac=fa:16:3e:99:c7:71,bus=pci.0,addr=0x2
Xenial
-netdev tap,fd=25,id=hostnet0
-device 
virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:e9:4a:82,bus=pci.0,addr=0x1
-netdev tap,fd=27,id=hostnet1
-device virtio-net-pci,netdev=hostnet1,id=net1,mac=fa:16:3e:b9: 
49:ed,bus=pci.0,addr=0x2

Ok, so all that is the same way.
The TL;DR of this is that id=XX maps it to network XX and the -device defines 
how it is represented to the guest.

It would be really useful to see the definition of those networks in your case, 
generate via:
$virsh net-dumpxml 
$virsh net-dumpxml 

I'll try to reproduce anyway - all I know from the bug is one ipv4 one ipv6.
A default would look like:
-netdev tap,fd=27,id=hostnet0,vhost=on,vhostfd=29
-device 
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:6f:13:c8,bus=pci.0,addr=0x1

I also see that you have no vhost accelleration enabled, not 
recommended/default IMHO but well, ok I can do so as well.
Random mac, normal virtio pci representation - nothing special at these bits.

You did not state what you do with these networks - so for now I just bridge 
them to the host.
Once I see your network config xml that will be more clear.

I set up the following networks:
 hostnet0-ipv4active noyes
 hostnet1-ipv6active noyes

With the definitions being basic, but following your description:
$ cat hostnet0-ipv4.xml

  hostnet0-ipv4
  
  

  

  


ubuntu@diamond:~/cpaelzer$ cat hostnet1-ipv6.xml

  hostnet1-ipv6
  
  

  

  


Add the following to my guest to link up to those networks in non vhost mode 
(set driver qemu as vhost would be default if available):

  
  
  


  
  
  


Host view:
$ for dev in hostnet0-ipv4 hostnet0pv4-nic hostnet1-ipv6 hostnet1pv6-nic; do ip 
addr show dev $dev; done
101: hostnet0-ipv4:  mtu 1500 qdisc noqueue 
state UP group default qlen 1000
link/ether 52:54:00:98:33:21 brd ff:ff:ff:ff:ff:ff
inet 10.0.21.1/24 brd 10.0.21.255 scope global hostnet0-ipv4
   valid_lft forever preferred_lft forever
102: hostnet0pv4-nic:  mtu 1500 qdisc pfifo_fast master 
hostnet0-ipv4 state DOWN group default qlen 1000
link/ether 52:54:00:98:33:21 brd ff:ff:ff:ff:ff:ff
103: hostnet1-ipv6:  mtu 1500 qdisc noqueue 
state UP group default qlen 1000
link/ether 52:54:00:89:77:1e brd ff:ff:ff:ff:ff:ff
inet6 2001:db8:ca2:2::1/64 scope global 
   valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe89:771e/64 scope link 
   valid_lft forever preferred_lft forever
104: hostnet1pv6-nic:  mtu 1500 qdisc pfifo_fast master 
hostnet1-ipv6 state DOWN group default qlen 1000
link/ether 52:54:00:89:77:1e brd ff:ff:ff:ff:ff:ff

Set up the guest so that it actually cares about those interfaces:
$ cat /etc/network/interfaces.d/51-extra-devs.cfg
auto enp0s7
iface enp0s7 inet dhcp

auto enp0s8
iface enp0s8 inet6 dhcp

It would be nice if you could share your config in /etc/network/* and subdirs.
As well as an output of
$ ip addr
$ ip link

So in my case my networks got ipv4 (plus the default ipv6 mapping) and the 
second one ipv6 only.
enp0s7Link encap:Ethernet  HWaddr 52:54:00:2d:59:f7  
  inet addr:10.0.21.184  Bcast:10.0.21.255  Mask:255.255.255.0
  inet6 addr: fe80::5054:ff:fe2d:59f7/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:340 errors:0 dropped:325 overruns:0 frame:0
  TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000 
  RX bytes:18600 (18.6 KB)  TX bytes:1304 (1.3 KB)

enp0s8Link encap:Ethernet  HWaddr 52:54:00:28:1e:65  
  inet6 addr: fe80::5054:ff:fe28:1e65/64 Scope:Link
  inet6 addr: 2001:db8:ca2:2:1::25/128 Scope:Global
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:341 errors:0 dropped:326 overruns:0 frame:0
  TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000 
  RX bytes:18601 (18.6 KB)  TX bytes:1166 (1.1 KB)

7 = hostnet0-ipv4
8 = hostnet0-ipv6

ipv4 routes look sane:
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric RefUse Iface
0.0.0.0 192.168.122.1   0.0.0.0 UG0  00 

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[bugproxy]

** Tags removed: bugnameltc-149773 severity-high

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[Jon Grimm]

** Changed in: qemu-kvm (Ubuntu)
 Assignee: Jon Grimm (jgrimm) => ChristianEhrhardt (paelzer)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[Manoj Iyer]

Jon, Could you pls assign this bug to a KVM developer on your team?

** Changed in: qemu-kvm (Ubuntu)
 Assignee: Taco Screen team (taco-screen-team) => Jon Grimm (jgrimm)

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[Manoj Iyer]

** Package changed: openstack (Ubuntu) => qemu-kvm (Ubuntu)

** Changed in: qemu-kvm (Ubuntu)
   Importance: Undecided => High

** Also affects: openstack (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: openstack (Ubuntu)
   Importance: Undecided => High

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

[Bug 1655161] Re: VM boots with no connectivity when booting with dual net configuration (ipv4 + ipv6)

[Manoj Iyer]

Could you please attach the dmesg output for Xenial after the failure
occurs ?

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1655161

Title:
  VM boots with no connectivity when booting with dual net configuration
  (ipv4 + ipv6)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/openstack/+bug/1655161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs