From henk at ripe.net Tue Jun 18 12:27:28 2002 From: henk at ripe.net (Henk Uijterwaal (RIPE-NCC)) Date: Tue, 18 Jun 2002 12:27:28 +0200 (CEST) Subject: Reinhard Sojka's thesis on IPDV. Message-ID: Dear colleagues, I'm pleased to announce that Reinhard Sojka's passed his exams and that his M.Sc. thesis on IPDV (IP Delay Variations aka jitter) is now available on our website at: http://www.ripe.net/test-traffic/Documents/Various/reinhard_thesis.pdf Kind regards, Henk ------------------------------------------------------------------------------ Henk Uijterwaal Email: henk.uijterwaal at ripe.net RIPE Network Coordination Centre WWW: http://www.ripe.net/home/henk Singel 258 Phone: +31.20.5354414 1016 AB Amsterdam Fax: +31.20.5354445 The Netherlands Mobile: +31.6.55861746 ------------------------------------------------------------------------------ That problem that we weren't having yesterday, is it better? (Big ISP NOC) NOTE: My email address (and a hole in our mailing list software) is being abused by a spammer. We are working on fixing this hole and tracking the spammer down. If you receive mail from "henk at ripe.net" that is obviously spam, please send me a copy of the mail including ALL headers. I'm sorry for any inconvenience caused by this. From henk at ripe.net Fri Jun 28 13:42:20 2002 From: henk at ripe.net (Henk Uijterwaal (RIPE-NCC)) Date: Fri, 28 Jun 2002 13:42:20 +0200 (CEST) Subject: ANNOUNCEMENT: RIPE NCC TTM, User Configurable Measurements with your Test-Box Message-ID: Dear Test-box hosts, We are pleased to announce a new feature on the (series C and D) RIPE NCC Test-Boxes: User Configurable Measurements. This feature allows you to specify measurements with (at the moment) different rates and packet sizes than the standard 120 packets/day and 100 bytes/packet respectively. In the future, this will be extended towards setting QoS bits in the packets. In this first version, we have limited the rate to 0.5 packets/second for each measurement relation. This is a soft limit, the system can actually handle up to 100 Hz between each pair of test-boxes. We'll raise the limit after beta-testing. To use this feature, go to the website on your Test-Box at: http://ttXX.ripe.net:10259/ With XX the number of your Test-Box and click on configuration. Online help is available. If cannot access this website please check if your test-box is a series C or D machine (serial number 48 or higher, or bought after October 2000). Also check if the IP address of your workstation is inside the range you specified for access to the test-box. In case the problem still persists, then please contact us at tt-ops at ripe.net. Note that for this new version, the algorithm to set packet Identifiers had to be changed. Previously, Packet-ID's were equal to the time a packet was supposed to be sent, rounded down to the nearest second. This has been changed to something more complex. If you have written tools that rely on the packet-ID being almost equal to the send time, then please use the code below to extract send-time from the new packet ID's. Our plan is to allow you to test drive this for a few weeks, incorporate any suggestions that you may have, then slowly raise limits and add setting QoS bits. Please send comments, questions and suggestions about this new feature to tt-ops at ripe.net. Kind regards, Maximo, Rene, Henk and the rest of the RIPE NCC TTM Crew ............................................................................. time_t DelayPlots::id2time(UInt_t packetid) { #define LASTUNIXTIME 1025190000 // Thu Jun 27 15:00:00 2002 GMT #define TIMEZERO 1009843200 // Tue Jan 1 00:00:00 2002 GMT #define CYCLEPERIOD 20000000 // cycle period in seconds #define FREQUENCY 100 time_t packettime; int nCycles; UInt_t starttimeId; // packetid at starttime if (starttime <= LASTUNIXTIME) { // no two cycles in delay plot if (packetid > LASTUNIXTIME) { packettime = packetid / FREQUENCY + TIMEZERO; } else { packettime = packetid; } } else { // all ids in new packetid schema nCycles = (starttime - TIMEZERO) / CYCLEPERIOD; starttimeId = (starttime - TIMEZERO - nCycles * CYCLEPERIOD) * FREQUENCY ; if (packetid < starttimeId) { // must have completed a cycle nCycles++; } packettime = packetid / FREQUENCY + nCycles * CYCLEPERIOD + TIMEZERO; } cout << packetid << " " << packettime << endl; return(packettime); } ............................................................................. ------------------------------------------------------------------------------ Henk Uijterwaal Email: henk.uijterwaal at ripe.net RIPE Network Coordination Centre WWW: http://www.ripe.net/home/henk Singel 258 Phone: +31.20.5354414 1016 AB Amsterdam Fax: +31.20.5354445 The Netherlands Mobile: +31.6.55861746 ------------------------------------------------------------------------------ That problem that we weren't having yesterday, is it better? (Big ISP NOC) NOTE: My email address (and a hole in our mailing list software) is being abused by a spammer. We are working on fixing this hole and tracking the spammer down. If you receive mail from "henk at ripe.net" that is obviously spam, please send me a copy of the mail including ALL headers. I'm sorry for any inconvenience caused by this.