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? 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... Thanks Ed W
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.