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] Multicasting with ATM - a concern
>> it is not entirely clear that you can easily construct a mpt-mpt >> VC service (to avoid the need for pt to mpt VC meshes). >A mpt-mpt VC doesn't work. Consider what happens if two machines >each send a packet at the same time. How does the receiver sort >the cell stream into 2 packets if they arrive on the same VC? >(AAL3/4 might work if you cooridinated allocation of the multiplexing >info.) yes, two solutions 1/ constrain VCI/VPI allocation for multipoint (i.e. make it a non local choice) 2/ extend the addrtessing thru MIDs or other multiplexing id info.... the former is broken because the ITU never understood the scale and number of groups (they didn;t think about community TV:-( the latter is broken because it needs extra logic outside the normal cell header processing and wil lcost some vendors dear.... sad... jon |
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