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Date: Wed, 10 Aug 2011 14:50:40 +0100 From: Simon Farnsworth <simon@...nz.org.uk> To: netdev@...r.kernel.org Subject: Re: Use of 802.3ad bonding for increasing link throughput Tom Brown wrote: > [couldn't thread with '802.3ad bonding brain damaged', as I've just > signed up] > > So, under what circumstances would a user actually use 802.3ad mode to > "increase" link throughput, rather than just for redundancy? Are there > any circumstances in which a single file, for example, could be > transferred at multiple-NIC speed? The 3 hashing options are: > As an example, from my server room here; I have an install server (TFTP, FTP and HTTP) connected by a 2x1G LACP bond to the switch. When I have multiple clients installing simultaneously, the layer2 hash distributes the load nicely across both NICs - I can reach saturation on both NICs together. If I had routers between my clients and the install server, I'd need layer2+3 hashing to spread the clients over the links, but I'd still be able to push over a gigabit per second to the clients, despite being limited to 1GBit/s to each individual client by the packet distribution. I'm sure that you can think of lots of other situations in which you have multiple conversations sharing a link - those are the situations that gain speed from 802.3ad. -- Simon Farnsworth -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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