[DRBD-user] syncing on multiple links

Igor Neves igor at 3gnt.net
Wed Nov 18 16:50:56 CET 2009



On 11/18/2009 01:00 PM, Bernd Petrovitsch wrote:
> On Wed, 2009-11-18 at 12:41 +0000, Mark Watts wrote:
>    
>> On Wed, 2009-11-18 at 13:39 +0100, Jeroen Groenewegen van der Weyden
>> wrote:
>>      
>>> Mark Watts wrote:
>>>        
>>>> On Wed, 2009-11-18 at 11:56 +0100, Jeroen Groenewegen van der Weyden
>>>> wrote:
>>>>          
> [...]
>    
>>>>> I'm wondering if there drbd supports a configuration of two nodes with
>>>>> each two nic's in two separate lan's.
>>>>> eg
>>>>> - node 1 connected to lan x and lan y
>>>>> - node 2 connected to lan x and lan y
>>>>>
>>>>> The drbd syncs through both lan-s or fails over from lan x to lan y when
>>>>> lan x fails.
>>>>>            
> [...]
>    
>>>> When you say "two lans" do you mean two different IP Subnets (eth
>>>> 192.168.1.0/24 and 172.16.1.0/24) or do you mean two layer-2 switches?
>>>>
>>>>          
>>> yes, two different subnets.
>>>        
>> As I suggested in my previous email, I don't believe this is supported.
>>      
> No need to.
> Just use kernel bonding of the 2 interfaces to accomplish a "HA network
> connection" and DRBD-sync over that.
>
> 	Bernd
>    


Bonding don't solve what it's asking, the simple answer for this is "No, 
you can't do that".

Bonding only works if NIC's on both nodes are physically connected to 
the same switch and would be in the same network.

I suggest you get a different approach to solve your problem, you can 
use bonding but have to stick with only one network and physically 
connected to the same switch. And most probably you will only get HA not 
throughput.

Good luck.

-- 
Igor Neves<igor.neves at 3gnt.net>
3GNTW - Tecnologias de Informação, Lda

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