From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Clewett Date: Mon, 10 Mar 2003 11:00:18 +0000 Subject: Re: [LARTC] Problems at end of slow satelite link Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Stef Coene wrote: > I think it's best you create a htb setup with different classes. One of the > classes needs a higher priority so the packets in that classes are send > first. Next you need to put the ssh/telnet/syn/ack packets in that classes. > All needed information can be found in the LARTC howto. And you can also > find more info on www.docum.org. This is Hierarchical Token Bucket, explained in section 9.4.5 of the HOWTO document? I was rather hoping you were going to surgest something else, as this is not in my kernel... :) I will however check out the documentation in some more detail. There are a few unresolved questions I have on this pleasent protocol. Like I notice it claims to scale up to the available bandwidth in proporsion to the allocated bandwidth. I need to know how it calculates this bandwidth, as our link shows all the properties of the available bandwidth being proporsional to 1/S noise. Ie, unpredictable and un-averagable. I would like to know also whether HTB scales down, if bandwidth becomes throtted by our unpredictable pipe. And in either case, whether it's possible to have a protected channel, like an admin channel, which doen't scale up or down with the rest, staying at, say, 16kbit... All of which I will now try and find out. And then attempt to get it into my kernels at either end. :) Ben The biggest mistory of my link-from-hell is the ping. This shows either a latency of 800ms, or 1.5 seconds, or up to 30 seconds when the line goes on-hold for a while. About once every two minutes. Yet Telnet/SSH consistently give latency far far more than this, of about 10 to 60 seconds consistetly. If anybody can surgest a reason for this, I think this is likelly to be at the heart of any fix I can find... Regards again... > > Stef > _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/