Thread View: vmsnet.networks.management.misc
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Started by Jerry Schave
Fri, 07 Aug 1992 00:54
LAN Traffic Manager (LTM) buffers/protocol
Author: Jerry Schave
Date: Fri, 07 Aug 1992 00:54
Date: Fri, 07 Aug 1992 00:54
41 lines
2748 bytes
2748 bytes
Keywords: DEC LTM, network monitoring Hello out there I am trying to develop a better method for collecting statistics from our extended ETHERNET LAN. We are currently using DECbridges 100's and 150's configured as LAN Traffic Monitors (LTMs) to collect statistics on each of our ETHERNET basebands which sends their results back to a VAXstation running LTM which displays the data on the screen. There are two basic problems with this scheme. The first is that no history of statistics can be kept unless the user cuts the information from the LTM screens and pastes it to a file. Also this method would be much better if it was automated. Second since there is a separate program for each baseband collecting the information there can be no network wide statistics such as what percentage of a a nodes traffic is crossing a bridge ect. I am currently investigating the feasibility of developing a program which could collect the information sent by the DECbridges 100/150's which are configured as LTMs and massaging the data to derive some more useful network wide statistics and save these to disk every specified period to develop a histogram of network behavior. The problem with this idea is that I do not have the format of the 1490 byte buffers that the LTMs send to the VAXstation every reporting period (3 seconds) which contains the information that the LTM software uses for its information. I have looked at the buffers with an analyzer but can develop no template to place over the buffers to derive the statistics. I was wondering if anyone out there had a description (template) for the buffers that the DECbridges 100/150's configured as LTMs send every reporting period to the VAX's which contains their statistics. Also any information regarding the LTM protocol would be most helpful. Thankx in advance. -- ----------------------------------------------------------------------- | Jerry Schave E-Mail j.schave@csc.canterbury.ac.nz | | Computer Services Centre | | University of Canterbury Phone +64 3 364-2329 | | Christchurch, New Zealand Fax +64 3 364-2332 | -----------------------------------------------------------------------
Re: LAN Traffic Manager (LTM) buffers/protocol
Author: degen
Date: Fri, 07 Aug 1992 13:57
Date: Fri, 07 Aug 1992 13:57
41 lines
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In article <1992Aug7.125459.221@csc.canterbury.ac.nz>, cctr143@csc.canterbury.ac.nz (Jerry Schave) writes: > Keywords: DEC LTM, network monitoring > > Hello out there > I am trying to develop a better method for collecting statistics > from our extended ETHERNET LAN. We are currently using DECbridges > 100's and 150's configured as LAN Traffic Monitors (LTMs) to collect > statistics on each of our ETHERNET basebands which sends their > results back to a VAXstation running LTM which displays the I take it you are running LTM as a point product and don't have DECMcc. You're right LTM has very limited usefulness for reporting statistics. DEC sells an assets package called LTMReports which basically collects the ltm packets which are saved in a data file over a given period of time. you can then run LTMReports against the collected data file to generate your reports. for graphical reports you need GKS and DATATRIEVE is also helpful. being an assets package it's not fully supported and really isn't fully developed....DEC has spent most of their time developing DECMcc. Oh yeah, I don't think you can run LTMReports on the same node you run LTM..... > The problem with this idea is that I do not have the format > of the 1490 byte buffers that the LTMs send to the VAXstation > every reporting period (3 seconds) which contains the information You might try posting to the vmsnet.decmcc news group. some of the DECMcc developers read that group and may be able to help you out with the packet formats. > > -- > ----------------------------------------------------------------------- > | Jerry Schave E-Mail j.schave@csc.canterbury.ac.nz | > | Computer Services Centre | > | University of Canterbury Phone +64 3 364-2329 | > | Christchurch, New Zealand Fax +64 3 364-2332 | > ----------------------------------------------------------------------- David Degen degen@nrlvax.nrl.navy.mil Space Systems Dev. Dept. (202)574-7299 Naval Research Lab
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