Thanks a lot ! very helpfull
BR Alexi On Thu, Jan 14, 2010 at 3:33 AM, Bit Gossip <bit.gos...@chello.nl> wrote: > 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