The IP over ATM Mailing List Archive by date[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] EE Times on IP over ATM
On Thu, 28 Mar 96 09:13:04 +0200 Juha Heinanen wrote: > like it or not, this is how it is when talk about multi-point to point > flows. atm switch can't handle those without store and forward. but so > far atm forum or itu have not defined mp-to-p atm connections at all, > which means that you need to use a real layer 3 device at every point > when merging of flows takes place. True, a MP-P circuit would have to do this to handle AAL5 packets. But if it did, could it then offer the same QoS guarantees currently offered by the P-P and P-MP connections? How is bandwidth and QoS defined in a circuit with multiple senders and a single receiver? I think there's more involved that just keeping the packets together. Also, I don't think you would need a layer 3 device at every merge point. All you really need is something above the SAR layer that relays AAL5 SDUs. This would not have to have any layer 3 awareness. All that needs to be done is to re-assemble AAL5 SDUs and relay them out on the appropriate hop to the next switch (or next VC). This is basically what an MCS is. --- pete ------------------ Peter Schulter schulter@zk3.dec.com Digital UNIX Networking voice (603) 881-2920 Digital Equipment Corp voice (DTN) 381-2920 ZK3-03/U14 FAX (603) 881-2257 110 Spit Brook Road FAX (DTN) 381-2257 Nashua, NH 03062
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