Bonding and pocket loss

Tétényi István tetenyi at sztaki.hu
Wed May 24 06:29:00 CDT 2006


Tétényi István wrote:
Dear All,

    * Thanks for your help.
    * The *packet* *loss* disappeared after changing the bonding mode
      param to six. 
    * The active backup is also working. It seems to me that roughly
      100msec is the change over time.

Best regards,
  Istvan

> Thomas_Chenault at dell.com wrote:
> Dear Thomas,
>
>>For bonding interfaces that are connected to two different switches, balance-alb mode is generally a reasonable choice. If only fault tolerance is required (no throughput aggregation), active-backup may be suitable.
>>
>>  
>>
> Tomorrow we will have a go. I will come back with the results.
>
> Kind regards,
>   Istvan
>
>>Thomas
>>
>>
>>-----Original Message-----
>>From: linux-poweredge at lists.us.dell.com [mailto:linux-poweredge at lists.us.dell.com] 
>>Sent: Tuesday, May 23, 2006 9:49 AM
>>To: Chenault, Thomas
>>Cc: linux-poweredge-Lists
>>Subject: Re: Bonding and pocket loss
>>
>>Thomas_Chenault at dell.com wrote:
>>Dear Thomas,
>>
>>  
>>
>>>Bonding mode 0 (balance-rr) generally requires that all member interfaces are connected to the same Ethernet switch and that the connected switch ports are configured for link aggregation (etherchannel or similar). Has the switch been configured to match the bond?
>>>
>>>
>>> 
>>>
>>>    
>>>
>>Thanks for your answer. The brief answer is: no.
>>
>>Each of the ethernet interfaces connected to one of the switches.
>>    blade 1  ethernet 0  is connected to  switch1  /  ethernet 1  is 
>>connected to  switch2
>>    blade 2  ethernet 0  is connected to  switch1  /  ethernet 1  is 
>>connected to  switch2
>>     ......
>>
>>Switch1 and switch 2 are interconnected with 3*1GE.  I know I have to 
>>check the spanning tree settings on the switches.
>>Let us assume it is enabled for each of the ethernet interfaces towards 
>>the blades.
>>
>>Is there any bonding mode that can cope with our arrangement? 
>>
>>The original idea is/was that if any of the internal blade switch fails 
>>the services  still can provided.
>>
>>Kind regards,
>>  Istvan
>>
>>  
>>
>>
>>
>>
>>  
>>
>>>Thomas
>>>
>>>
>>>-----Original Message-----
>>>From: linux-poweredge-bounces at dell.com [mailto:linux-poweredge-bounces at dell.com] On Behalf Of Tétényi István
>>>Sent: Monday, May 22, 2006 10:53 PM
>>>To: linux-poweredge-Lists
>>>Subject: Bonding and pocket loss
>>>
>>>Hi,
>>>
>>>We do have a Dell  PowerEdge 1850 running with RedHat Enterprise Linux  
>>>4.  We use bonding mode=0 of the blade ethernet interfaces.
>>>There is a 1-5% pocket loss pinging from any blade to any other blade.  
>>>If the bonding is switched off the pocket loss disappears.
>>>
>>>Any advice is appreciated.
>>>
>>>Istvan
>>>
>>>
>>>=====================================================================
>>>Istvan Tetenyi                              e-mail:tetenyi at sztaki.hu
>>>Computer and Automation Institute               phone: +361-279-6022
>>>Budapest, Victor Hugo u 18-22                   fax:   +361-279-6021
>>>H-1132. Hungary
>>>=====================================================================
>>>
>>>_______________________________________________
>>>Linux-PowerEdge mailing list
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>>>
>>>    
>>>
>>
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>>  
>>
>
>------------------------------------------------------------------------
>
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