| Title: | DECmcc user notes file. Does not replace IPMT. |
| Notice: | Use IPMT for problems. Newsletter location in note 6187 |
| Moderator: | TAEC::BEROUD |
| Created: | Mon Aug 21 1989 |
| Last Modified: | Wed Jun 04 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 6497 |
| Total number of notes: | 27359 |
There seems to be a difference between the way MCC and ELMS report LAN
Bridge 200 derived network utilisation.
ELMS uses:-
((total bytes rx + total bytes tx)*(8 bits/byte)+ frame overhead)/sec
---------------------------------------------------------------------
10Mbits/sec
MCC (performance analyzer PM) uses:-
((bytes rx + bridge bytes tx) * bits)/time
------------------------------------------
speed
Which one is correct (if any)? Why the use of bridge bytes tx?
Any ideas.
Thanks
Tony.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1281.1 | Investigating | TOOK::ANWARUDDIN | Anwar | Fri Jul 26 1991 13:29 | 13 |
The formula used by the Performance Analyzer should read
((Total bytes rx + Total bytes tx) * bits)/time
------------------------------------------
speed
There was a problem in that "Bridge bytes tx" were being used instead of
the "Total Bytes tx". This is a known problem and a patch is available
to fix this. There is a seperate note in this conference describing the
patch. The documentation will be fixed in the next release.
We are investigating the use of "frame overhead" in the ELMS formula.
| |||||
| 1281.2 | Still there! | VIVIAN::MILTON | Invisible person it seems! | Wed Jan 15 1992 07:08 | 5 |
1.2 PA FM use still has the old formula - BTW HP suggest that a value of 9,922,048 is used instead of 10,000,000 for the speed as you should take into account the minimum 812 `dead' slots per second. Tony. | |||||
| 1281.3 | QAR 2143 | TOOK::MINTZ | Erik Mintz, DECmcc Development | Wed Jan 15 1992 18:06 | 2 |
Entered as QAR 2143 | |||||