subject:"\[ovirt\-users\] Re\: Bridge not forwarding frames on node."

[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Dominik Holler

On Fri, May 15, 2020 at 4:39 PM Stefano Danzi  wrote:

> I've just rebooted the ovirt node and now it works, without any changes in
> configuration.
> I can't imagine why.
>
>
Thanks for letting us know that this solved the problem.
Please let us know if the issue happens again.



> Il 15/05/2020 15:10, Dominik Holler ha scritto:
>
>
> Hi! I have to check, but it is strange.
>>> Arp replies originated from the VM has not problems, only ARP replies
>>> that came from TAP device in VM where not forwarded to real LAN.
>>>
>>
>> Do you have a TAP device inside the VM?
>>
>>
>> Yes! This VM act as L2 VPN server. Inside the VM tap device is bridged
>> with vm lan adapter.
>>
>>
> This should work, so let me ask some detailed questions:
>
> Does the issue reproduce, if you are using a single NIC instead of a bond?
>
> Can you please share the output of
> bridge fdb show br ovirtmgmt
> and
> brctl showmacs ovirtmgmt
> while replacing ovirtmgmt with the name of your bridge?
> What are relevant MAC addresses like bridge/bond, vNIC and tun device in
> the output?
>
> What is the output of
>
> ebtables -t filter -L
>
> ?
>
> The thread
> [ovirt-users] DHCP Client in Guest VM does not work on ovirtmgmt
>
> https://lists.ovirt.org/archives/list/users@ovirt.org/thread/566IC5K2B2JJV77ZQO73KGJNMRJNQ67X/#566IC5K2B2JJV77ZQO73KGJNMRJNQ67X
> might be similar.
>
>
>
>>
>>> Exactly as descived in bz1279161 (that's solved in bz1135347 but it's
>>> not public and I can't read it)
>>>
>>>
>> Unfortunately BZ1135347 does not look helpful here.
>>
>>
>>
>>
>
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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Stefano Danzi

I've just rebooted the ovirt node and now it works, without any changes 
in configuration.

I can't imagine why.

Il 15/05/2020 15:10, Dominik Holler ha scritto:



Hi! I have to check, but it is strange.
Arp replies originated from the VM has not problems, only ARP
replies
that came from TAP device in VM where not forwarded to real LAN.


Do you have a TAP device inside the VM?


Yes! This VM act as L2 VPN server. Inside the VM tap device is
bridged with vm lan adapter.


This should work, so let me ask some detailed questions:

Does the issue reproduce, if you are using a single NIC instead of a bond?

Can you please share the output of
bridge fdb show br ovirtmgmt
and
brctl showmacs ovirtmgmt
while replacing ovirtmgmt with the name of your bridge?
What are relevant MAC addresses like bridge/bond, vNIC and tun device 
in the output?


What is the output of
ebtables -t filter -L
?

The thread
[ovirt-users] DHCP Client in Guest VM does not work on ovirtmgmt
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/566IC5K2B2JJV77ZQO73KGJNMRJNQ67X/#566IC5K2B2JJV77ZQO73KGJNMRJNQ67X
might be similar.



Exactly as descived in bz1279161 (that's solved in bz1135347
but it's
not public and I can't read it)


Unfortunately BZ1135347 does not look helpful here.




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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Dominik Holler

On Fri, May 15, 2020 at 2:41 PM Stefano Danzi  wrote:

>
>
> Il 15/05/2020 14:29, Dominik Holler ha scritto:
>
>
>
> On Fri, May 15, 2020 at 9:35 AM Stefano Danzi  wrote:
>
>>
>>
>> Il 14/05/2020 20:13, Strahil Nikolov ha scritto:
>> > On May 14, 2020 6:16:06 PM GMT+03:00, Stefano Danzi 
>> wrote:
>> >>
>> >> Il 14/05/2020 12:50, Dominik Holler ha scritto:
>> >>>
>> >>> On Wed, May 13, 2020 at 9:44 PM s.danzi > >>> > wrote:
>> >>>
>> >>>  Hi to all!
>> >>>
>> >>>  I'm having an issue with networks bridges on ovirt node.
>> >>>
>> >>>  It's look like this bug:
>> >>>  https://bugzilla.redhat.com/show_bug.cgi?id=1279161
>> >>>
>> >>>  On VM I have a bridge between a tap device and network
>> >> interface.
>> >>>  On node side the interface is bridged with bond0 vlan 128
>> >>>  (bond0.128 lacp).
>> >>>
>> >>>  When I ping an host on the other side of tap device I can see
>> >> this:
>> >>>  Arp request goes from my lan to the tap device on vm. Arp reply
>> >>>  return from tap vm and bridge forward this to vm networks
>> >>>  interface. Using tcpdump on vm interface on node I can see the
>> >> arp
>> >>>  reply, using tcpdump on bond0.128 or on bridge I can't see the
>> >> arp
>> >>>  reply.  Arp request is forwarded from bond0.128 to vm net but arp
>> >>>  reply isn't forwarded from vm net to bond0.128.
>> >>>
>> >>>
>> >>>
>> >>> Any chance that there is network filtering involved?
>> >>> Please check if the related vNIC profile has No Network Filter.
>> >>> If there is a Network Filter set, please shutdown the VM, set to No
>> >>> Network Filter in the vNIC profile, and start the VM again and check
>> >>> if the issue is gone.
>> >> Hi! No Network filter It was my first check.
>>
>
> Did you power off the VM after removing the network filter from the vNIC
> profile?
> There is currently no indication of the running vNIC configuration does
> not match the
> desired configuration (BZ1113630).
>
> Yes, of corse
>
>
Thanks, I just wanted to avoid misunderstandings.


> > Have you checked the MTU ?
>> > You need to keep it a little bit lower on the VM, as you have vlan on
>> the hypervisor.
>> >
>> > Best Regards,
>> > Strahil Nikolov
>> Hi! I have to check, but it is strange.
>> Arp replies originated from the VM has not problems, only ARP replies
>> that came from TAP device in VM where not forwarded to real LAN.
>>
>
> Do you have a TAP device inside the VM?
>
>
> Yes! This VM act as L2 VPN server. Inside the VM tap device is bridged
> with vm lan adapter.
>
>
This should work, so let me ask some detailed questions:

Does the issue reproduce, if you are using a single NIC instead of a bond?

Can you please share the output of
bridge fdb show br ovirtmgmt
and
brctl showmacs ovirtmgmt
while replacing ovirtmgmt with the name of your bridge?
What are relevant MAC addresses like bridge/bond, vNIC and tun device in
the output?

What is the output of

ebtables -t filter -L

?

The thread
[ovirt-users] DHCP Client in Guest VM does not work on ovirtmgmt
https://lists.ovirt.org/archives/list/users@ovirt.org/thread/566IC5K2B2JJV77ZQO73KGJNMRJNQ67X/#566IC5K2B2JJV77ZQO73KGJNMRJNQ67X
might be similar.



>
>> Exactly as descived in bz1279161 (that's solved in bz1135347 but it's
>> not public and I can't read it)
>>
>>
> Unfortunately BZ1135347 does not look helpful here.
>
>
>
>
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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Stefano Danzi




Il 15/05/2020 14:29, Dominik Holler ha scritto:



On Fri, May 15, 2020 at 9:35 AM Stefano Danzi > wrote:




Il 14/05/2020 20:13, Strahil Nikolov ha scritto:
> On May 14, 2020 6:16:06 PM GMT+03:00, Stefano Danzi
mailto:s.da...@hawai.it>> wrote:
>>
>> Il 14/05/2020 12:50, Dominik Holler ha scritto:
>>>
>>> On Wed, May 13, 2020 at 9:44 PM s.danzi mailto:s.da...@hawai.it>
>>> >> wrote:
>>>
>>>      Hi to all!
>>>
>>>      I'm having an issue with networks bridges on ovirt node.
>>>
>>>      It's look like this bug:
>>> https://bugzilla.redhat.com/show_bug.cgi?id=1279161
>>>
>>>      On VM I have a bridge between a tap device and network
>> interface.
>>>      On node side the interface is bridged with bond0 vlan 128
>>>      (bond0.128 lacp).
>>>
>>>      When I ping an host on the other side of tap device I can see
>> this:
>>>      Arp request goes from my lan to the tap device on vm. Arp
reply
>>>      return from tap vm and bridge forward this to vm networks
>>>      interface. Using tcpdump on vm interface on node I can
see the
>> arp
>>>      reply, using tcpdump on bond0.128 or on bridge I can't
see the
>> arp
>>>      reply.  Arp request is forwarded from bond0.128 to vm net
but arp
>>>      reply isn't forwarded from vm net to bond0.128.
>>>
>>>
>>>
>>> Any chance that there is network filtering involved?
>>> Please check if the related vNIC profile has No Network Filter.
>>> If there is a Network Filter set, please shutdown the VM, set
to No
>>> Network Filter in the vNIC profile, and start the VM again and
check
>>> if the issue is gone.
>> Hi! No Network filter It was my first check.


Did you power off the VM after removing the network filter from the 
vNIC profile?
There is currently no indication of the running vNIC configuration 
does not match the

desired configuration (BZ1113630).

Yes, of corse


> Have you checked the MTU ?
> You need to keep it a little bit lower on the VM, as you have
vlan on the hypervisor.
>
> Best Regards,
> Strahil Nikolov
Hi! I have to check, but it is strange.
Arp replies originated from the VM has not problems, only ARP replies
that came from TAP device in VM where not forwarded to real LAN.


Do you have a TAP device inside the VM?


Yes! This VM act as L2 VPN server. Inside the VM tap device is bridged 
with vm lan adapter.



Exactly as descived in bz1279161 (that's solved in bz1135347 but it's
not public and I can't read it)


Unfortunately BZ1135347 does not look helpful here.


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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Dominik Holler

On Fri, May 15, 2020 at 9:35 AM Stefano Danzi  wrote:

>
>
> Il 14/05/2020 20:13, Strahil Nikolov ha scritto:
> > On May 14, 2020 6:16:06 PM GMT+03:00, Stefano Danzi 
> wrote:
> >>
> >> Il 14/05/2020 12:50, Dominik Holler ha scritto:
> >>>
> >>> On Wed, May 13, 2020 at 9:44 PM s.danzi  >>> > wrote:
> >>>
> >>>  Hi to all!
> >>>
> >>>  I'm having an issue with networks bridges on ovirt node.
> >>>
> >>>  It's look like this bug:
> >>>  https://bugzilla.redhat.com/show_bug.cgi?id=1279161
> >>>
> >>>  On VM I have a bridge between a tap device and network
> >> interface.
> >>>  On node side the interface is bridged with bond0 vlan 128
> >>>  (bond0.128 lacp).
> >>>
> >>>  When I ping an host on the other side of tap device I can see
> >> this:
> >>>  Arp request goes from my lan to the tap device on vm. Arp reply
> >>>  return from tap vm and bridge forward this to vm networks
> >>>  interface. Using tcpdump on vm interface on node I can see the
> >> arp
> >>>  reply, using tcpdump on bond0.128 or on bridge I can't see the
> >> arp
> >>>  reply.  Arp request is forwarded from bond0.128 to vm net but arp
> >>>  reply isn't forwarded from vm net to bond0.128.
> >>>
> >>>
> >>>
> >>> Any chance that there is network filtering involved?
> >>> Please check if the related vNIC profile has No Network Filter.
> >>> If there is a Network Filter set, please shutdown the VM, set to No
> >>> Network Filter in the vNIC profile, and start the VM again and check
> >>> if the issue is gone.
> >> Hi! No Network filter It was my first check.
>

Did you power off the VM after removing the network filter from the vNIC
profile?
There is currently no indication of the running vNIC configuration does not
match the
desired configuration (BZ1113630).


> > Have you checked the MTU ?
> > You need to keep it a little bit lower on the VM, as you have vlan on
> the hypervisor.
> >
> > Best Regards,
> > Strahil Nikolov
> Hi! I have to check, but it is strange.
> Arp replies originated from the VM has not problems, only ARP replies
> that came from TAP device in VM where not forwarded to real LAN.
>

Do you have a TAP device inside the VM?


> Exactly as descived in bz1279161 (that's solved in bz1135347 but it's
> not public and I can't read it)
>
>
Unfortunately BZ1135347 does not look helpful here.
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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Stefano Danzi

Il 14/05/2020 20:13, Strahil Nikolov ha scritto:

On May 14, 2020 6:16:06 PM GMT+03:00, Stefano Danzi wrote:

Il 14/05/2020 12:50, Dominik Holler ha scritto:

On Wed, May 13, 2020 at 9:44 PM s.danzi mailto:s.da...@hawai.it>> wrote:

Hi to all!

I'm having an issue with networks bridges on ovirt node.

It's look like this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1279161

On VM I have a bridge between a tap device and network

interface.

On node side the interface is bridged with bond0 vlan 128
(bond0.128 lacp).

When I ping an host on the other side of tap device I can see

this:

Arp request goes from my lan to the tap device on vm. Arp reply
return from tap vm and bridge forward this to vm networks
interface. Using tcpdump on vm interface on node I can see the

arp

reply, using tcpdump on bond0.128 or on bridge I can't see the

arp

reply. Arp request is forwarded from bond0.128 to vm net but arp
reply isn't forwarded from vm net to bond0.128.

Any chance that there is network filtering involved?
Please check if the related vNIC profile has No Network Filter.
If there is a Network Filter set, please shutdown the VM, set to No
Network Filter in the vNIC profile, and start the VM again and check
if the issue is gone.

Hi! No Network filter It was my first check.

Have you checked the MTU ?
You need to keep it a little bit lower on the VM, as you have vlan on the
hypervisor.

Best Regards,
Strahil Nikolov

Hi! I have to check, but it is strange.
Arp replies originated from the VM has not problems, only ARP replies
that came from TAP device in VM where not forwarded to real LAN.
Exactly as descived in bz1279161 (that's solved in bz1135347 but it's
not public and I can't read it)

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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-15 Thread Stefano Danzi

Already removed the network filter This is not the problem :(

Il 14/05/2020 23:20, Giulio Casella ha scritto:

Maybe you can check the vm network filter.
Take a look at Network -> vNic profile -> and
choose edit. If "Network Filter" has the default value
"vdsm-no-mac-spoofing", it can prevent bridge normal behaviour. Maybe
"No network filter" can do the magic.

HTH.

Cheers,
Giulio

On 14/05/2020 17:16, Stefano Danzi wrote:

Il 14/05/2020 12:50, Dominik Holler ha scritto:

On Wed, May 13, 2020 at 9:44 PM s.danzi > wrote:

Hi to all!

I'm having an issue with networks bridges on ovirt node.

It's look like this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1279161

On VM I have a bridge between a tap device and network
interface. On node side the interface is bridged with bond0 vlan
128

(bond0.128 lacp).

When I ping an host on the other side of tap device I can see this:

Arp request goes from my lan to the tap device on vm. Arp reply
return from tap vm and bridge forward this to vm networks
interface. Using tcpdump on vm interface on node I can see the arp
reply, using tcpdump on bond0.128 or on bridge I can't see the arp
reply. Arp request is forwarded from bond0.128 to vm net but arp
reply isn't forwarded from vm net to bond0.128.

Hi! No Network filter It was my first check.

[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-14 Thread Giulio Casella

HTH.

Cheers,
Giulio

On 14/05/2020 17:16, Stefano Danzi wrote:

Il 14/05/2020 12:50, Dominik Holler ha scritto:

On Wed, May 13, 2020 at 9:44 PM s.danzi > wrote:

Hi to all!

I'm having an issue with networks bridges on ovirt node.

It's look like this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1279161

On VM I have a bridge between a tap device and network interface.
On node side the interface is bridged with bond0 vlan 128

(bond0.128 lacp).

When I ping an host on the other side of tap device I can see this:

Hi! No Network filter It was my first check.

--
Giulio Casellagiulio at di.unimi.it
System and network architect
Computer Science Dept. - University of Milano
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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-14 Thread Strahil Nikolov via Users

On May 14, 2020 6:16:06 PM GMT+03:00, Stefano Danzi  wrote:
>
>
>Il 14/05/2020 12:50, Dominik Holler ha scritto:
>>
>>
>> On Wed, May 13, 2020 at 9:44 PM s.danzi > > wrote:
>>
>> Hi to all!
>>
>> I'm having an issue with networks bridges on ovirt node.
>>
>> It's look like this bug:
>> https://bugzilla.redhat.com/show_bug.cgi?id=1279161
>>
>> On VM I have a bridge between a tap device and network
>interface. 
>> On node side the interface is bridged with bond0 vlan 128
>> (bond0.128 lacp).
>>
>> When I ping an host on the other side of tap device I can see
>this:
>>
>> Arp request goes from my lan to the tap device on vm. Arp reply
>> return from tap vm and bridge forward this to vm networks
>> interface. Using tcpdump on vm interface on node I can see the
>arp
>> reply, using tcpdump on bond0.128 or on bridge I can't see the
>arp
>> reply.  Arp request is forwarded from bond0.128 to vm net but arp
>> reply isn't forwarded from vm net to bond0.128.
>>
>>
>>
>> Any chance that there is network filtering involved?
>> Please check if the related vNIC profile has No Network Filter.
>> If there is a Network Filter set, please shutdown the VM, set to No 
>> Network Filter in the vNIC profile, and start the VM again and check 
>> if the issue is gone.
>
>Hi! No Network filter It was my first check.

Have you checked the MTU ?
You need to keep it a little bit lower on the VM, as you have vlan on the 
hypervisor.

Best Regards,
Strahil Nikolov
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[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-14 Thread Stefano Danzi

Il 14/05/2020 12:50, Dominik Holler ha scritto:

On Wed, May 13, 2020 at 9:44 PM s.danzi > wrote:

Hi to all!

I'm having an issue with networks bridges on ovirt node.

It's look like this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1279161

On VM I have a bridge between a tap device and network interface.
On node side the interface is bridged with bond0 vlan 128
(bond0.128 lacp).

When I ping an host on the other side of tap device I can see this:

Hi! No Network filter It was my first check.

[ovirt-users] Re: Bridge not forwarding frames on node.

2020-05-14 Thread Dominik Holler

On Wed, May 13, 2020 at 9:44 PM s.danzi  wrote:

> Hi to all!
>
> I'm having an issue with networks bridges on ovirt node.
>
> It's look like this bug:
> https://bugzilla.redhat.com/show_bug.cgi?id=1279161
>
> On VM I have a bridge between a tap device and network interface.  On node
> side the interface is bridged with bond0 vlan 128 (bond0.128 lacp).
>
> When I ping an host on the other side of tap device I can see this:
>
> Arp request goes from my lan to the tap device on vm. Arp reply return
> from tap vm and bridge forward this to vm networks interface. Using tcpdump
> on vm interface on node I can see the arp reply, using tcpdump on bond0.128
> or on bridge I can't see the arp reply.  Arp request is forwarded from
> bond0.128 to vm net but arp reply isn't forwarded from vm net to bond0.128.
>
>

Any chance that there is network filtering involved?
Please check if the related vNIC profile has No Network Filter.
If there is a Network Filter set, please shutdown the VM, set to No Network
Filter in the vNIC profile, and start the VM again and check if the issue
is gone.



> Very strange.
>
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[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

[ovirt-users] Re: Bridge not forwarding frames on node.

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