Date: Wed, 18 Jun 2008 23:39:23 -0400 From: Martes G Wigglesworth <martes@mgwigglesworth.com> To: Andrew Thompson <thompsa@freebsd.org> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: Use lagg(4) or Use Layer-4 Load Balancing? Message-ID: <1213846763.14151.1.camel@localhost> In-Reply-To: <20080618172216.GA76058@citylink.fud.org.nz> References: <1213691523.22762.16.camel@localhost> <20080618172216.GA76058@citylink.fud.org.nz>
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I was attempting to find good information on how to achieve a type of bonding using advanced routing on FreeBSD, such as with layer-4 routers, that can bond multiple sources into a single overall larger source for logical backbone creation for networks. On Wed, 2008-06-18 at 13:22 -0400, Andrew Thompson wrote: > On Tue, Jun 17, 2008 at 04:32:03AM -0400, Martes G Wigglesworth wrote: > > Greetings all. > > > > I have been attempting to research what I have been informed is > > actually accomplished with layer-4 load balancing. I have seen many > > articles and reviews that indicate that lagg(4) will accomplish the > > teaming of multiple internet access sorces into a single logical pipe, > > however, I have tried this using a dumb switch two nic interfaces and > > this simply is not the case. > > > > I am new and may not have enough cool equipment around, however, aside > > from using the fail-over mode for redundancy, and lacp on a supported > > switch, then if lagg(4) could really combine multiple sources into one > > for use as a larger overall backbone, then I should be able to get > > doulbed bandwidth using two separate ports on an unmanaged switch using > > some option on the lagg(4) driver, which is not the cast.(if this is > > wrong I would be happy to get the correct information, however I have a > > few network engineer references that say that you cannot do anything > > more than layer-2 lacp with appropriate equipment to create an > > isp-supported trunk) Even in the on-lamp interview the 7.0 developer > > implies that you can do what I am attempting to research however, it is > > not possible at layer 2 without an end-point. > > How are you testing this? You need to have multiple IP flows in order to > fully utilise the multiple links. See this snippet from the handbook > (i'll put it in the man page too). > > "Since frame ordering is mandatory on Ethernet links then any traffic > between two stations always flows over the same physical link limiting > the maximum speed to that of one interface. The transmit algorithm > attempts to use as much information as it can to distinguish different > traffic flows and balance across the available interfaces." > > > Does that answer your question, you will not get more speed on a single > download. > > > Andrew > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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