Date: Wed, 16 Mar 2005 08:18:42 -0800 From: Darcy Buskermolen <darcy@wavefire.com> To: freebsd-net@freebsd.org Subject: Re: Too many IPs assigned to an interface? Message-ID: <200503160818.42548.darcy@wavefire.com> In-Reply-To: <20050316112225.Y92893@ganymede.hub.org> References: <20050316112225.Y92893@ganymede.hub.org>
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On Wednesday 16 March 2005 07:46, Marc G. Fournier wrote: > Since talking about ng_fec, and the cisco switch, I started to play with > it a bit, and one of the things I've finally setup is snmp/mrtg, so that I > can monitor bw activity ... > > one thing that I've noticed is that two of my machines are doing alot of > bandwidth, while the other two are doing significantly less ... > > The thing is, the ones that are doing significantly less are the ones that > have the most IPs assigned to their interfaces ... > > based on 5 minute averages: > > neptune - 68kb/s In, 119kb/s Out, 92 IPs assigned, Dual Xeon > mars - 289kb/s In, 320kb/s Out, 35 IPs assigned, Dual PIII > > vmstat 5 on neptune: > > 102 3 0 1722316 206436 258 0 1 0 465 0 4 49 511 3885 2398 3 > 86 12 102 3 0 1681208 205624 74 0 0 0 63 0 1 0 305 3293 > 1233 2 57 41 96 3 0 1702012 189492 69 0 0 0 845 0 6 6 342 > 3606 2066 6 53 41 91 3 0 1699380 151064 85 0 0 0 2072 0 12 12 > 418 2752 3239 9 23 69 90 3 0 1681276 148584 53 0 0 0 463 0 1 > 3 325 2554 2266 6 23 72 > > vmstat 5 on mars: > > 11 5 0 4071268 211624 2329 1 2 1 1348 486 0 0 710 378 1049 6 > 24 70 14 5 0 4059324 198648 597648 0 0 0 920 0 18 157 933 7267 > 12086 4 56 40 15 5 0 4070128 189200 652140 1 0 0 853 0 4 122 > 931 6188 9166 5 52 44 16 5 0 4056332 211964 693722 0 2 0 1690 1558 > 1 167 1276 5614 4517 9 49 42 16 5 0 4012580 208272 722681 0 0 0 1133 > 0 3 137 909 3839 5456 6 48 46 > > the other one that seems 'low' for traffic is a Dual Athlon (85 IPs) ... > the other that is high for traffic is another Dual PIII (21) ... > > So, is network performance that greatly affected by # of IPs assigned to > the interface itself? Or is there maybe another factor involved? Some other factor, I'd be inclined to thing the Jails are the factor here. I have boxen with multiple class C's worth of address assigned to them and they still push multi Mb/sec with little effort. > > ---- > Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) > Email: scrappy@hub.org Yahoo!: yscrappy ICQ: 7615664 > _______________________________________________ > 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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