[ofa-general] RE: IPoIB bonding document ?

[Scott Weitzenkamp (sweitzen)]

Yes to both questions. IPoIB bonding supports failover (and failback),
not load balancing.

Scott 

> -----Original Message-----
> From: general-bounces at lists.openfabrics.org 
> [mailto:general-bounces at lists.openfabrics.org] On Behalf Of 
> Tang, Changqing
> Sent: Wednesday, April 18, 2007 8:10 AM
> To: Or Gerlitz
> Cc: OpenFabrics General
> Subject: [ofa-general] RE: IPoIB bonding document ?
> 
> 
> 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 ?
> 
> 	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 ?
> 
> 
> --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.
> > 
> > 
> > 
> > 
> > 
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