Bonding and pocket loss

[linux-poweredge at lists.us.dell.com]

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
>=====================================================================
>
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