let's do the maths: File size: 2MB = 16Mb Transfer time: 16Mb / 128Mb/s = 125 sec - ie a pretty long lime for those used to LAN-type speeds a better explanation would be to try to empty a bucket through a pinhole in the bottom - the point being that the data *will* get through (disregarding application timeouts or similar), whereas you're never going to get a lemon onto a pop bottle without breaking the bottle or splitting the lemon. one possible solution would be to implemet some sort of queueing - prioritize delay-sensitive traffic (interactive sessions and the like), and give large file transfers (ftp, http) a lower priority. Saying that it sounds like you need to get yourself some extra bandwidth - depending upon your needs you might wish to look at leased lines. probably time for you to do the maths as to whether you can justify the expense ;-) Andy ----- Original Message ----- From: "KM Reynolds" To: Sent: Wednesday, May 09, 2001 1:34 AM Subject: Sending JPEG across an ISDN bridged link brings the network to [7:3720] > Hi all, > > Need the groups advice. > > The network consists of two 1605 routers with 128k ISDN connections in a > transparent bridge environment. > This network suffers from lockups often,however, not consistently. > Yesterday, speaking with a user, he asked me a question. The question was, > "Why is it when I send a JPEG file to a user located across the ISDN link, > the network come to a halt?". > I told him that if the JPEG was very large in size ex. 2MB, when it has to > cross the ISDN link, its like trying to squeeze a lemon(a small one) into a > pop bottle(maybe not a good example, but that is all I could think off). > This saturates the ISDN link which is only 128k. > > Am I correct in my explanation? What would be a good explanation? I am not > comfortable with my explanation(maybe I am wrong). I look forward to > hearing the groups thoughts, as well as any solutions(change to routing, > QOS, etc.) > > TIA > KM > > > _________________________________________________________________________ > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=3786&t=3786 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
