[ovirt-users] R: Re: Network instability after upgrade 3.6.0 -> 3.6.1

[Jon Archer]

Hi Stefano,

It's definitely not the switch, it seems to be the latest kernel package 
(kernel-3.10.0-327.3.1.el7.x86_64) which stops bonding working 
correctly, reverting back to the previous kernel brings the network up 
in 802.3ad mode (4).

I know, from reading the release notes of 7.2, that there were some 
changes to the bonding bits in the kernel so i'm guessing maybe some 
defaults have changed.

I'll keep digging and post back as soon as i have something.

Jon

On 29/12/15 19:55, Stefano Danzi wrote:
> Hi! I didn't solve yet. I'm still using mode 2 on bond interface. 
> What's your switch model and firmware version?
>
> -------- Messaggio originale --------
> Da: Jon Archer <jon at rosslug.org.uk>
> Data: 29/12/2015 19:26 (GMT+01:00)
> A: users at ovirt.org
> Oggetto: Re: [ovirt-users] Network instability after upgrade 3.6.0 -> 
> 3.6.1
>
> Stefano,
>
> I am currently experiencing the same issue. 2x nic lacp config at 
> switch, mode 4 bond at server with no connectivity. Interestingly I am 
> able to ping the switch itself.
>
> I haven't had time to investigate thoroughly but my first thought is 
> an update somewhere.
>
> Did you ever resolve and get back to mode=4?
>
> Jon
>
> On 17 December 2015 17:51:50 GMT+00:00, Stefano Danzi 
> <s.danzi at hawai.it> wrote:
>
>     I partially solve the problem.
>
>     My host machine has 2 network interfaces with a bond. The bond was
>     configured with  mode=4 (802.3ad) and switch was configured in the same way.
>     If I remove one network cable the network become stable. With both
>     cables attached the network is instable.
>
>     I removed the link aggregation configuration from switch and change the
>     bond in mode=2 (balance-xor). Now the network are stable.
>     The strange thing is that previous configuration worked fine for one
>     year... since the last upgrade.
>
>     Now ha-agent don't reboot the hosted-engine anymore, but I receive two
>     emails from brocker evere 2/5 minutes.
>     First a mail with "ovirt-hosted-engine state transition
>     StartState-ReinitializeFSM" and after "ovirt-hosted-engine state
>     transition ReinitializeFSM-EngineStarting"
>
>
>     Il 17/12/2015 10.51, Stefano Danzi ha scritto:
>
>         Hello, I have one testing host (only one host) with self
>         hosted engine and 2 VM (one linux and one windows). After
>         upgrade ovirt from 3.6.0 to 3.6.1 the network connection works
>         discontinuously. Every 10 minutes HA agent restart hosted
>         engine VM because result down. But the machine is UP, only the
>         network stop to work for some minutes. I activate global
>         maintenace mode to prevent engine reboot. If I ssh to the
>         hosted engine sometimes the connection work and sometimes no.
>         Using VNC connection to engine I see that sometime VM reach
>         external network and sometimes no. If I do a tcpdump on
>         phisical ethernet interface I don't see any packet when
>         network on vm don't work. Same thing happens fo others two VM.
>         Before the upgrade I never had network problems.
>         ------------------------------------------------------------------------
>         Users mailing list Users at ovirt.org
>         http://lists.ovirt.org/mailman/listinfo/users
>
>
>
>     ------------------------------------------------------------------------
>
>     Users mailing list
>     Users at ovirt.org
>     http://lists.ovirt.org/mailman/listinfo/users
>
> -- Sent from my Android device with K-9 Mail. Please excuse my brevity. 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20151229/efcbf761/attachment-0001.html>