English
- 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)
