From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Furniss Date: Mon, 06 Jun 2005 20:11:44 +0000 Subject: Re: [LARTC] Interleave cells with IP over ATM? Message-Id: <42A4AE00.2080305@dsl.pipex.com> List-Id: References: <42A447B3.1080903@wildgooses.com> In-Reply-To: <42A447B3.1080903@wildgooses.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Ed W wrote: > Anyone know if it's possible to interleave two IP packets when using > PPPoA and VC based lines? Can it be done with any PPPoE implementations? I think pppoa/e is irrelavent it has to be done at ATM level which means you need a different VPI/VCI on the cells to distinguish them. In the UK if BT/Some LLU teleco would let me have two different VPI/VCI s then I could probably do it. My PCI modems' drivers have code to interleave/priorotise at cell level. > > The goal is to reduce the delay when you have a high priority packet > waiting, but a lower priority (large) packet already started going out > ahead of this packet. I don't want the overhead of much smaller MTU, > which is the other way to workaround it... Having the code to hack I did wonder whether as a kludge it would work if transmitting a long train of cells belonging to the same aal5 frame was just aborted to be retransmitted later when a shorter frame arrived... as long as the other end didn't count all the trashed frames and use it to disconnect/try to resync. Are you really using something that makes +45ms too much or just wanting to tweak? Andy. _______________________________________________ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc