| Title: | FDDI - The Next Generation |
| Moderator: | NETCAD::STEFANI |
| Created: | Thu Apr 27 1989 |
| Last Modified: | Thu Jun 05 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2259 |
| Total number of notes: | 8590 |
Objet : AVERAGE TRANSMISSION TIME ON ETHERNET
Hi to you all,
THIS IS NOT A FDDI RELATED TOPIC, but I was told that some of you could
probabely help me out on this one. I'll appreciate any help on this
*****VERY***** difficult one. It has been cross-posted in DNT note
2920
I have a customer that want to be assured thet ETHERNET will have an
average transmission delay of 1 millisecond and that in 95% of cases
the delay won't be greathet than 5 milliseconds.
I have the following numbers
GAT VAL PB STJ HMR
Number of nodes 35 42 53 74 96
Throughput (Mb/sec) .85 1.0 1.3 1.8 2.3
I know that the average packet will be 1KB or 8192 bits.
I know the throughput because I know, for example that HMR will be
transmitting an average of 2924 packets/sec in worst case.
2924 packets/sec * 8192 bits/packets * 96 nodes = 2,300,000,000 bits/sec
Will it be possible to get an average transmission delay of 1 millisec,
with a max delay of 5 milli sec in 95% of the time.
I NEED THIS INFO FOR TODAY, AUGUST 8 BY 16h00.
Help guys,
Thanks and see ya at NET U
Andre J Courchesne
632-3747
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| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 322.1 | KONING::KONING | Eesti vabaks! | Thu Aug 08 1991 11:39 | 11 | |
The 1 ms average applies to 50% load, and you're well below that. Should be no problem. (Actually, the 1 ms average is for bridges. The actual network access time is only a part of that, perhaps half. On the other hand, on other node types the system overhead might be higher. Were you talking about bridges? FYI, the Ethernet conference (MOUSE::ETHERNET) is the best place for this question. paul | |||||