[ovirt-users] bonding mode-alb

[Demeter Tibor]

Dear Luca,

I've created a config with two 16 port 10GBe switches,those does not connected to each other. 
I have 4 hosts and 1 storage host. I don't know why, but I can't ping from all of host to all of hosts. 
For example I can ping from .1 to .2 but not .3! From .3 I can ping .4 but don't .1 :)
I don't know the cables how is connected to the switch, but I'm sure every host connected to switches whit two inferface (one-to-one)

Thanks!

Regards,
Tibor
----- 2018. jan.. 26., 14:06, Luca remix_tj Lorenzetto lorenzetto.luca at gmail.com írta:

> Hi Demeter,
> 
> i don't know how the switch setup is done here, but as far as i know
> they aren't stacked through interconnect.
> 
> Luca
> 
> On Fri, Jan 26, 2018 at 1:44 PM, Demeter Tibor <tdemeter at itsmart.hu> wrote:
>> Dear Luca,
>>
>> Sorry for the very late reply..
>>
>> I want to try out now your mentions.
>> Should I make an interconnect the two switches in active/backup mode?
>> Thanks!
>>
>> Tibor
>>
>> ----- 2017. dec.. 12., 19:35, Luca 'remix_tj' Lorenzetto
>> <lorenzetto.luca at gmail.com> írta:
>>
>> Hi,
>>
>> If you're looking at a simple ha bonding setup, why not using active-backup
>> (mode 1)?
>>
>> We're using it in almost all our setups and switches toin backup interface
>> in 100ms when a link down is detected (Setting miimon=100).
>>
>> Doesn't aggregate bandwidth but is a very good solution for high
>> availability whwn you can't configure lacp or a portchannel on switch side.
>>
>> Luca
>>
>>
>> Il 12 dic 2017 7:06 PM, "Demeter Tibor" <tdemeter at itsmart.hu> ha scritto:
>>>
>>> Hi,
>>>
>>> Thanks for the answers.
>>>
>>> In this case the only question is: what is better for me? Mode 5 or 6?
>>> In which modes how is fast the switching?
>>>
>>> Until now I've use 802.3ad lacp on our old cluster. I did some tests and
>>> it was very fast. I know it is not same, but mode 5 or 6 how is safe?
>>> Thanks
>>>
>>> Regards,
>>>
>>> Tibor
>>>
>>>
>>>
>>> ----- 2017. dec.. 11., 13:24, Simone Tiraboschi <stirabos at redhat.com>
>>> írta:
>>>
>>>
>>>
>>> On Mon, Dec 11, 2017 at 12:53 PM, Demeter Tibor <tdemeter at itsmart.hu>
>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> Could help anyone for me in this question?
>>>>
>>>> Thanks.
>>>>
>>>> R.
>>>>
>>>> Tibor
>>>>
>>>>
>>>>
>>>> ----- 2017. dec.. 6., 14:07, Demeter Tibor <tdemeter at itsmart.hu> írta:
>>>>
>>>> Dear members,
>>>>
>>>> I would like to use two switch to make high-availability network
>>>> connection for my nfs storage.
>>>> Unfortunately, these switches does not support 802.3.ad lacp, (really I
>>>> can't stack them)  but I've read about mode-alb and mode-tlb bonding modes.
>>>> I know,these modes are available in ovirt, but how is work that? Also how
>>>> is safe? Are there for HA or for load balance?
>>>>
>>>> I've read some forums, where does not recommended these modes to use in
>>>> ovirt. What is the truths?
>>>> I would like to use only for storage-traffic, it will be separated from
>>>> other network traffic. I have two 10Gbe switches and two 10Gbe ports in my
>>>> nodes.
>>>>
>>>
>>> Look here:
>>>
>>> https://www.ovirt.org/documentation/admin-guide/chap-Logical_Networks/#bonds-1
>>>
>>> "Important: Modes 1, 2, 3, and 4 support both virtual machine (bridged)
>>> and non-virtual machine (bridgeless) network types. Modes 0, 5 and 6 support
>>> non-virtual machine (bridgeless) networks only.¨
>>>
>>> So both tlb (mode 5) or alb (mode 6) are fine only if you use them just
>>> for the storage access but not for VMs.
>>>
>>>>
>>>> Thanks in advance,
>>>>
>>>> R
>>>>
>>>> Tibor
>>>>
>>>>
>>>>
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>>
> 
> 
> 
> --
> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare
> calcoli che potrebbero essere affidati a chiunque se si usassero delle
> macchine"
> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
> 
> "Internet è la più grande biblioteca del mondo.
> Ma il problema è che i libri sono tutti sparsi sul pavimento"
> John Allen Paulos, Matematico (1945-vivente)
> 
> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca at gmail.com>