Another concept you may want to investigate in regards to Frame Relay and ATM is closed loop architecture and open loop architecture. It has been a while since i have read about the differences but if i remember correctly open loop allows the customer to keep sending traffic and then relies on the customers higher layer applications to manage the congestion control. In closed loop the carrier is aware of the congestion from end to end and will throttle back customer traffic at the edge and use congestion notification backwards and forwards along the path to control congestion. By throttling back the customer trqaffic at the edge it keeps more traffic from getting onto an already congested network and making the problem worse. Some carriers use open some use closed. I am sure my definitions leave something to be desired but i think that is the basic idea. It might pay to do a search at the Frame Relay forumn if you want more info. Ed Dombrowski ""Chuck Larrieu"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > dropped/refused entry because of congestion on the cloud. This in turn leads > to the retransmission of dropped packets/cells, which in turn leads to more > congestion, in a never ending spiral ( in theory, at least ) > > Reality: This gets into sizing of WAN links / CIR's / CBR's > > I am a bit curious. Anyone here have any real world experience with this > kind of thing happening? I can see how this can happen in theory. In > reality, carrier cloud congestion is not such that it would likely lead to > this kind of result, is it? > > So if the above premise is something that can and does happen regularly, > what does the carrier do - just massive dropping of packets / cells until > the problem disappears, probably after hours that day? > > Any experience? > > Chuck > > One IOS to forward them all. > One IOS to find them. > One IOS to summarize them all > And in the routing table bind them. > > -JRR Chambers- > 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=2645&t=2645 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
