Cell Relay Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Re: ATM Switches with ABR
In article <32902493.88E@ind.uni-stuttgart.de>, Thomas Renger <renger@ind.uni-stuttgart.de> writes: > I was just wondering whether somebody reading this newsgroup knows about > any commercial ATM switch which already has the ABR protocol running (I > don't mean only in the advertisements and product catelogues but rather > in reality). I haven't seen any other responses yet so I'll take the first step... The answer depends upon what you mean by "ABR". Do you want something that meets the ATM Forum rate based specs? If so, I don't know what (if anything) is available now. Do you want something that does flow control so you can run some experiments without cell loss? If so, that's easy. Digital has been shipping credit based flow control for a long time. It's in the GIGAswitch/ATM and ATMworks 750 and 350. We use the VPI slot in the cell header to send back the credits so it doesn't work through other switches. We also do brute force buffer allocation so it won't work (well?) on WAN/long links. If you want more info on the next generation of credit based flow control, check out Quantum Flow Control at: http://www.qfc.org/ |
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