I had 2x T320 configured each with a bundle of 3x 10GE and traffic was split correctly 33% 33% 33%
These has been in place for several years and across several Junos releases. On Thu, 2010-01-14 at 02:57 -0300, alexi wrote: > Hello Stefan: > > Thanks for your answer, this was a costumer question that i think camed from > the way how load balancing in Cisco using Ether Channel was done , in that > case you had a fixed number of 8 values so the hashing algorithm (using the > source ip , mac ... etc) gives you one of those fixed values. So each one of > the links in a bundle was identified with one or several of those values ... > so in this case you can only have perfect load balance if you are using 2, 4 > or 8 links ... any other combination gives you a not even distribution ... > > this is explained here : > http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a0080094714.shtml > > I donĀ“t know how this goes in 802.3ad in Juniper ...what do you think ? , > > have you ever seen examples of good load balancing using 3 , 5 or 6 links in > a bundle ? > > BR > Alexi > > > On Thu, Jan 14, 2010 at 2:04 AM, Stefan Fouant < > sfou...@shortestpathfirst.net> wrote: > > > > -----Original Message----- > > > From: juniper-nsp-boun...@puck.nether.net [mailto:juniper-nsp- > > > boun...@puck.nether.net] On Behalf Of alexi > > > Sent: Wednesday, January 13, 2010 11:45 PM > > > To: mti...@globaltransit.net > > > Cc: juniper-nsp@puck.nether.net > > > Subject: Re: [j-nsp] 802.3ad Question > > > > > > Hello Mark: > > > > > > I am coming back to this question , i would apreciate your help again > > > ... > > > > > > in the example you mention you said that your bundle is using 3xGE and > > > you > > > have a pretty fair load balance 1:1:1 > > > do you know if there is any requirement about having pair numbers or > > > power > > > of 2 amount of links in a bundle to get a good load balance ? > > > > > > I guess that should depend on the hashing algorithm but of course there > > > is > > > no much info about how it works .... we are interested to have 6xGE in > > > a > > > bundle ... so , will we get 6Gbps of real throuhput ...? > > > > The hashing algorithm Juniper uses is proprietary so there isn't much > > useable information out that, but in my experience I've never seen anything > > along the lines which would require a LAG to be comprised of multiples of 2 > > links to get an even load balance. The load balancing tends to get a more > > even distribution when you've got a large number of flows. Assuming a > > large > > number of flows, you should be able to get an even balance across the > > component links within the 802.3ad LAG bundle. You might also want to > > consider enabling Layer 4 hashing to get even more granular distribution, > > if > > the source and destinations are sparse, but you're using a large number of > > source and destination ports. > > > > HTHs. > > > > Stefan Fouant, CISSP, JNCIE-M/T > > www.shortestpathfirst.net > > GPG Key ID: 0xB5E3803D > > > > > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp