Date: Fri, 26 Aug 2005 07:23:01 +0200 (CEST) From: "Evgueni V. Gavrilov" <aquatique@rusunix.org> To: freebsd-net@FreeBSD.org Subject: Re: Aggregate network interfaces Message-ID: <20050826052301.62F13228737@rusunix.org> In-Reply-To: <1125031757.79719.TMDA@seddon.ca>
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In article <1125031757.79719.TMDA@seddon.ca> you wrote: > Oh wow! That's cool. I missed that somehow. The 'man' page doesn't > mention the hash functions options. > > On the Cat 6500s you can log into the Sup and change the hash function so > it's not just IP, but rather IP+Port. I've previously used this to balance > the load across multiple gig links with traffic going to a sinlge backup > host, for example. (I you want to know how I'll have to look that up) Fast EtherChannel/GigaChannel does ballance itself AFAIK upon closing kern/85239 (by emax, not me) I did some tests, and one of them was parallel transfers (input/output) to/from several hosts. so I noticed funny balancing: transfers to/from one host ballanced over 2 interfaces in the bundle so that incoming traffic goes through one interface, outgoing traffic goes through another. further transfers from/to another hosts will be ballanced the same way until peak rate will hit. after peak hit both interfaces in the bundle are used for transmit and receiving. I suppose that behaviour for the most part caused by switch/stack ports config, since ng_fec(4) has only 1 setting: forwarding method (set_mode_mac/set_mode_inet). May be it would be great to have some description of switch/stack ports configuration in the ng_fec(4) man page.
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