Tracefile: losspatterns.nam This animation shows the loss distribution in an Mbone session over time. Color indicates the loss on a particular link as follows: red: loss > 10% orange: 2% < loss <= 10% brown: 0% < loss <= 2% black: no loss blue: possible duplication The data was gathered using mtrace by monitoring RTCP session messages, and periodically initiating an mtrace from every current receiver back to the data source. The data source in this case was node 0, which is sending audio to the Mbone session "KWAX Classical Radio" between 14:30 and 18:30 on Tuesday 17th Feb 1998. When one set of mtraces finish a new set are initiated, which results in us sampling the loss about every 3 to 4 minutes. Where multiple mtraces include the same link in the same interval, the number of received packets and number of lost packets are added, so towards the sender, results tend to be based on more data and longer averages than towards the receivers. Frequently links and nodes grey out - this indicates that either the receiver left the group (which was rare) or the mtrace failed. The reason for performing this monitoring was to get some kind of indication of how stable loss points are over time - whether the points of congestion move around or not. For those interested, the mapping from node number to IP address is given below. Mark Handley - 17th Feb 1998 ---------- 0 = 128.223.32.1 (cisco3-gw.uoregon.edu) 1 = 128.223.3.7 (cisco7-gw.uoregon.edu) 2 = 128.223.32.151 (pythia.uoregon.edu) 3 = 207.98.66.11 (eugene-hub.nero.net) 4 = 207.98.64.6 (eugene-isp.nero.net) 5 = 204.70.158.61 (dec3800-2-fddi-0.SanFrancisco.mci.net) 6 = 203.183.255.106 (sw01.TokyoNet.AD.JP) 7 = 192.42.110.249 (paloalto-mbone1.bbnplanet.net) 8 = 204.70.170.29 (dec3800-1-fddi-0.LosAngeles.mci.net) 9 = 203.178.136.234 (mbone.otemachi.wide.ad.jp) 10 = 199.94.207.2 (cambridge1-mbone1.bbnplanet.net) 11 = 204.140.133.12 (mbone.ln.net) 12 = 203.178.136.193 (sun1.tokyo.wide.ad.jp) 13 = 204.70.64.61 (dec3800-2-fddi-0.WestOrange.mci.net) 14 = 204.140.133.8 (mb204.isi.edu) 15 = 192.41.197.21 (mbone.nc.u-tokyo.ac.jp) 16 = 204.70.74.77 (dec3800-2-fddi-1.Washington.mci.net) 17 = 128.9.160.33 (slate.isi.edu) 18 = 157.82.76.11 (shiva.race.u-tokyo.ac.jp) 19 = 193.174.226.254 (mr-stuttgart1.win-ip.dfn.de) 20 = 140.173.4.9 (140.173.4.9) 21 = 157.82.76.3 (berkeley.race.u-tokyo.ac.jp) 22 = 193.174.226.34 (mr-nuernberg1.win-ip.dfn.de) 23 = 140.173.4.30 (140.173.4.30) 24 = 193.174.226.18 (mr-leipzig1.win-ip.dfn.de) 25 = 18.26.64.1 (video-room-mrouter.lcs.mit.edu) 26 = 134.109.2.250 (134.109.2.250) 27 = 18.26.0.4 (north.lcs.mit.edu) 28 = 134.109.2.244 (134.109.2.244) 29 = 134.109.192.17 (134.109.192.17) 30 = 131.188.6.3 (ds9.gate.uni-erlangen.de) 31 = 129.187.53.117 (sunemil.lrz-muenchen.de) 32 = 131.159.0.81 (tuminfo2.informatik.tu-muenchen.de) 33 = 131.159.1.8 (sunrbg5.informatik.tu-muenchen.de) 34 = 128.9.128.75 (liberty.isi.edu) 36 = 4.0.35.20 (atlanta1-mbone1.bbnplanet.net) 37 = 130.207.244.30 (feta-fddi.gatech.edu) 38 = 130.207.251.3 (130.207.251.3) 39 = 199.77.154.23 (199.77.154.23) 40 = 192.215.245.10 (192.215.245.10) 41 = 198.17.46.39 (mbone.sdsc.edu) 42 = 198.17.46.43 (cs-f-vbns.sdsc.edu) 43 = 204.147.129.94 (204.147.129.94) 44 = 205.189.33.233 (205.189.33.233) 45 = 205.189.32.157 (205.189.32.157) 46 = 132.214.6.112 (132.214.6.112) 47 = 205.158.0.60 (205.158.0.60) 48 = 207.126.96.172 (207.126.96.172) 49 = 207.126.96.234 (207.126.96.234) 50 = 206.251.5.98 (206.251.5.98) 51 = 204.71.197.209 (204.71.197.209) 52 = 128.125.247.32 (dmz-gw.usc.edu) 53 = 129.4.51.2 (achtung.sp.TRW.COM) 54 = 129.4.50.202 (129.4.50.202) 55 = 128.9.160.81 (ra2.isi.edu) 56 = 204.70.114.45 (204.70.114.45) 57 = 204.70.104.77 (204.70.104.77) 58 = 12.0.1.7 (12.0.1.7) 59 = 12.0.1.25 (12.0.1.25) 60 = 128.9.160.26 (bah.isi.edu) 61 = 128.9.128.8 (128.9.128.8) 62 = 204.70.164.29 (dec3800-1-fddi-0.Sacramento.mci.net) 63 = 140.142.116.1 (mcast.cac.washington.edu) 64 = 192.220.249.66 (seamr2-gw.nwnet.net) 65 = 192.220.238.129 (seamr1-gw.nwnet.net) 66 = 131.107.1.249 (pogo.microsoft.com) 67 = 131.107.1.201 (bernarda.microsoft.com) 68 = 128.9.160.8 (mb160.isi.edu) 69 = 166.48.14.6 (166.48.14.6)