[ofa-general] Re: IPoIB bonding document ?

[Moni Shoua]

Tang, Changqing wrote:
> Or:
> 	the doc is too short, I hope to get some technical details.
> Suppose "ib-bond --bond-ip 192.186.10.100 --slaves ib0,ib2"
> during regular operation time, only ib0 has traffic, ib2 is NOT used,
> right ?
Right
> 
> 	When ib0 fails, TCP fail-over to ib2. Then ib0 is
> repaired(replace a cable/switch, for example). Later when ib2 fails,
> can TCP fail-over back to ib0 again ?
Yes.
> 
> 
> --CQ 
> 
>> -----Original Message-----
>> From: Or Gerlitz [mailto:ogerlitz at voltaire.com] 
>> Sent: Wednesday, April 18, 2007 1:59 AM
>> To: Tang, Changqing
>> Cc: OpenFabrics General; Moni Shoua
>> Subject: Re: IPoIB bonding document ?
>>
>> Tang, Changqing wrote:
>>> I know you are working on bonding, where is a good document about 
>>> IPoIB bonding ?
>>> I have a few questions:
>>>
>>> 1. is bonding working on two HCAs, as well as two ports on 
>> th same HCA ?
>>> 2. is the second channel idle, or two channels are used 
>> during regular 
>>> time ?
>> Hi CQ - I am cc-ing the general list as well, as other people 
>> might be interested as well.
>>
>> The package provided with OFED 1.2 contains documentation, 
>> you can browse to the below url to get the doc.
>> http://www.openfabrics.org/git/?p=~monis/ofed-bond-pkg.git;a=t
>> ree;f=ib-bonding-0.9.0/docs;h=ea30b3e6e8ebe530182cff18e8e7db19
>> ee4aa346;hb=HEAD
>>
>> Bonding works in the interface level such that a bonding 
>> master interface (eg bond0) enslaves other interfaces (eg ib0 
>> and ib1). In the IPoIB case, the enslaved devices can be 
>> bounded to two (or more) ports on the same/different HCA, its 
>> also possible to bond child interfaces (eg ib0.8003 and ib1.8003) etc.
>>
>> The bonding driver has one HA and few LB operation modes, 
>> currently, only the HA mode (named Active-Backup) is 
>> supported for IPoIB.
>>
>>> 3. the mesage re-transmit from first channel to second 
>> channel at TCP 
>>> packet level, right ?
>> I am not sure to follow you, in case you ask if after bonding 
>> fail-over TCP re-transmission is done over the active 
>> interface used by bonding, the answer is yes.
>>
>> Or.
>>
>>
>>
>>
>>