Date: Fri, 19 Oct 2001 10:47:18 +0200 From: "Patrick O'Reilly" <patrick@mip.co.za> To: "webdesigns COMNET" <webdesigns@comnet.ca> Cc: <questions@FreeBSD.ORG> Subject: RE: ftp hogging bandwidth Message-ID: <NDBBIMKICMDGDMNOOCAIGEJMDLAA.patrick@mip.co.za> In-Reply-To: <00dc01c1583f$7daba770$0200000a@critter>
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Jason, I'm afraid I have not used queues myself, so I have no experience on that. It seems to me that the idea is that you may attach multiple queues to one pipe, and if the weights of the queues are equal then they will each receive a fair distribution of the bandwidth available to the pipe, but if some queues have more weight then they should get more of the available bandwidth (a bigger slice of the pie :). The man page does not make it very clear whether a weight of 1 gets more and 100 less, or vice-versa. The sample line in that message was simply restated from the question raised by the original poster. He was already using a value of 30, so I left it untouched. In my use of DUMMYNET I have simply used pipes themselves, without queues, and that has been sufficient for my needs. Notice what Jason Borkowsky wrote (or is that you too?) > -----Original Message----- > From: owner-freebsd-questions@FreeBSD.ORG > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Jason Borkowsky > Sent: 18 October 2001 19:39 > To: questions@FreeBSD.ORG > Cc: josh@bitstream.net > Subject: Re: ftp hogging > > > > I don't know if anybody answered this, but if you use IPFW, you can do > this easily as follows: > > ipfw pipe 10 config bw 16Kbit/s queue 100 > > where "pipe 10" is the ID of the pipe, bw is the bandwidth of the pipe, > and queue is the number of packets this pipe queue will hold while waiting > for transmission. The above command defines to the pipe. To use it, add > the next line as well: > > ipfw add pipe 10 tcp from any 22 to any out xmit fxp0 > > where "pipe 10" is the ID again of the pipe to use, 22 is the ftp TCP > protocol number, and fxp0 is the outgoing interface. This is pretty much what I do. Patrick. > -----Original Message----- > From: webdesigns COMNET [mailto:webdesigns@comnet.ca] > Sent: 19 October 2001 03:44 > To: Patrick O'Reilly > Cc: questions@FreeBSD.ORG > Subject: Re: ftp hogging bandwidth > > > On that page, I read: > ipfw queue 1 config pipe 1 weight 30 mask dst-ip 0x000000ff (ssh > connections may use 100% of available bandwidth) > What does tha value "weight 30" mean exactly? > I'm not to clear with the man explanation: weight weight > Specifies the weight to be used for flows matching > this queue. > The weight must be in the range 1..100, and defaults to 1. > Jason > > > ----- Original Message ----- > From: "Patrick O'Reilly" <patrick@mip.co.za> > To: "Weldon S Godfrey 3" <weldon@excelsus.com>; "Joshua Holland" > <josh@bitstream.net> > Cc: <questions@FreeBSD.ORG> > Sent: Thursday, October 18, 2001 4:09 AM > Subject: RE: ftp hogging bandwidth > > > > Yes - look into ipfw, and specifically its DUMMYNET feature. > > > > Check this in the question list archive for some more details: > > > http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1160624+0+current/fre > ebsd-quest > > ions > > > > Patrick. > > > > > -----Original Message----- > > > From: owner-freebsd-questions@FreeBSD.ORG > > > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Weldon S > > > Godfrey 3 > > > Sent: 17 October 2001 19:56 > > > To: Joshua Holland > > > Cc: questions@FreeBSD.ORG > > > Subject: Re: ftp hogging bandwidth > > > > > > > > > > > > You mean the machine is bogging down or your outside connection is > getting > > > bogged down? > > > > > > I think the ftp session is taking your entire fractional T. I don't > think > > > it would be slowing down your machine too much. > > > > > > IPFW I *think* has rate shaping ability. You might be able > to add rules > > > to set ftp to a certain bandwidth. > > > > > > I am now going beyond my experience, I haven't tried to rateshape on a > > > freebsd box yet. > > > > > > > > > On Wed, 17 Oct 2001, Joshua Holland wrote: > > > > > > > I think they were ftp-ing through our box to an off site location. > > > > > > > > >I assuming that someone is ftping to a ftp server that is also your > > > > >nat/firewall box? > > > > > > > > > >One really cheezy way would be this: > > > > > > > > > >Have 2 nics on your server > > > > > > > > > >1 nic has the IP address for ftp. In DNS you can make that IP > > > be whatever > > > > >you want (ftp.localhost, ftp.biststeam.net, etc) > > > > > > > > > >the other nic is doing the rest of your internal lan stuff > > > > > > > > > >and since you are doing nat, you might have a 3rd nic for WAN. > > > > > > > > > > > > > > >if you don't have a 100Mb shared hub, or want to lower the ftp > > > bandwidth > > > > >further for some reason, you could force the dedicated ftp nic to > 10Mb > > > > > > > > > > > > > > > > > > > > > > > > >On Wed, 17 Oct 2001, Joshua Holland wrote: > > > > > > > > > >> Hello, > > > > >> > > > > >> I help administer a FreeBSD machine that runs nat, > dhcpd, mail and > > > > >> web servers for an organization with about 75 desktop clients. > They > > > > >> have a 256k fractional T1. We have noticed the machine bogging > down > > > > >> sometimes (people complaining of extremely slow web page > > > loading, and > > > > >> when I ssh in, very slow response). Top shows less > than 1% of CPU > > > > >> being used. This last time, it seems someone was > ftp-ing a 100MB > > > > >> file, and when they terminated the transfer, everything was fast > > > > >> again. Is there anyway to prevent one client or process > > > from hogging > > > > >> all that bandwidth? > > > > >> > > > > >> Joshua Holland. > > > > >> > > > > >> > > > > >> To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-questions" in the body of the message > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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