Multicast Beacon v1.3-0   This page is showing: Local Jitter (%)

The NLANR/DAST Beacon project has ended as of 12/31/2005. Community support is available at http://sourceforge.net/projects/multicastbeacon.
As of 9/14/2006 this beacon server is running on new hardware and is maintained by the NCSA Network Engineering group. Please contact neteng at ncsa dot edu with questions.

Time: Sun Sep 7 15:25:34 2008 CST | Page Refresh: 60 seconds | Started: Sun Sep 7 4:20:03 2008 | Beacons: 42
Target Multicast Group: 233.4.200.18 | Client-to-Client (RTP) multicast traffic on port: 10002, RTCP traffic on port: 10003
TCP unicast reports going back to the Central Server on port 10004

Central Loss | Local Loss | Fract Loss | Central RTT | Local RTT | Central Jitter | Local Jitter | Beacon Info | History | Previous History

# Hostname IP Address RRs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9   S10 S11 S12 S13 S14 S15 S16 S17 S18 S19   S20 S21 S22 S23 S24 S25 S26 S27 S28 S29   S30 S31 S32 S33 S34 S35 S36 S37 S38 S39   S40 S41
R0 beacon.sapac.edu.au 129.127.96.120 138 0 0 NA 0 0 0 NA NA 0 0 R0 0 NA NA 0 0 0 0 0 0 0 R0 0 0 NA NA NA 0 0 0 0 NA R0 0 0 0 0 0 NA 0 NA 0 0 R0 NA NA
R1 asok.ce.unisa.edu.au 130.220.65.218 493 0 0 0 0 0 0 0 0 0 0 R1 0 0 0 0 0 0 0 0 0 0 R1 0 0 0 0 0 0 0 0 0 0 R1 0 0 0 0 0 0 0 0 0 0 R1 0 0
R2 dawn.ml.unisa.edu.au 130.220.64.249 589 0 0 0 0 0 0 0 0 0 0 R2 0 0 0 0 0 0 0 0 0 0 R2 0 0 0 0 0 0 0 0 0 0 R2 0 0 0 0 0 0 0 0 0 0 R2 0 0
R3 ubuntu.radio-canada.ca Unresolvable 56 0 0 NA 0 0 0 0 0 0 0 R3 4 0 NA 0 0 0 0 0 0 0 R3 0 0 0 ** 0 0 0 0 0 78 R3 0 0 NA 29 0 0 0 12 0 0 R3 NA NA
R4 collab3.westgrid.ca 142.231.1.123 70 0 0 0 0 0 0 0 0 0 0 R4 0 0 0 0 0 0 0 0 0 0 R4 0 0 0 ** 0 0 0 0 0 81 R4 0 0 NA 34 0 0 0 15 0 0 R4 NA NA
R5 perfmon-control.internet2.edu 207.75.165.71 48 0 NA 0 0 0 0 0 0 0 0 R5 0 0 0 0 0 0 0 0 0 0 R5 NA 0 0 77 0 0 0 0 NA NA R5 0 0 NA 39 0 0 0 0 0 0 R5 NA NA
R6 check3.net.kent.edu 131.123.252.237 30 0 NA 0 0 0 0 NA 0 0 0 R6 NA NA 0 0 0 0 0 0 0 0 R6 NA 0 0 NA NA 0 0 NA NA NA R6 0 0 0 NA 0 0 0 NA 0 0 R6 NA NA
R7 nighthawk.rnet.missouri.edu 128.206.118.134 23 0 0 0 NA 0 0 0 0 NA 0 R7 0 NA 0 0 0 NA 0 0 0 0 R7 0 0 0 ** 0 0 0 0 0 81 R7 0 NA NA 34 0 0 NA 15 NA 0 R7 NA NA
R8 netmenderx.cc.ndsu.nodak.edu 134.129.95.122 18 0 NA 0 NA 0 NA NA NA 0 0 R8 NA NA 0 0 NA 0 0 0 0 NA R8 NA 0 0 NA NA 0 0 NA NA NA R8 0 NA NA NA 0 0 NA NA 0 0 R8 NA NA
R9 xenon.ops.tns.its.psu.edu 128.118.70.6 22 0 0 0 NA 0 0 NA 0 0 0 R9 0 0 0 0 0 NA 0 0 0 0 R9 0 0 0 ** NA 0 0 0 0 71 R9 0 NA 0 34 0 0 NA NA NA 0 R9 NA NA
# Hostname IP Address RRs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9   S10 S11 S12 S13 S14 S15 S16 S17 S18 S19   S20 S21 S22 S23 S24 S25 S26 S27 S28 S29   S30 S31 S32 S33 S34 S35 S36 S37 S38 S39   S40 S41
R10 otc1.psu.edu 128.118.25.5 23 0 NA 0 NA 0 0 NA 0 0 0 R10 NA NA 0 0 0 NA 0 0 0 NA R10 0 0 0 NA NA 0 0 NA 0 NA R10 0 NA 0 NA 0 0 NA NA NA 0 R10 NA NA
R11 g217display.bsd.uchicago.edu 128.135.122.108 23 0 NA 0 0 0 0 NA 0 0 0 R11 NA 0 0 0 0 0 0 0 0 NA R11 0 0 0 0 NA 0 0 NA 0 0 R11 0 0 0 NA 0 0 0 NA 0 0 R11 NA NA
R12 fig.uchicago.edu 128.135.106.42 24 0 NA NA 0 0 0 NA 0 0 0 R12 NA 0 NA 0 0 0 0 0 0 NA R12 0 0 0 NA NA 0 0 NA 0 NA R12 0 0 0 NA 0 0 0 NA 0 0 R12 NA NA
R13 poblano.noc.ucla.edu 169.232.24.12 24 0 NA 0 NA 0 NA NA NA 0 0 R13 NA NA 0 0 0 NA 0 0 0 NA R13 NA 0 0 NA NA 0 0 NA NA NA R13 0 NA NA NA 0 0 NA NA NA 0 R13 NA NA
R14 serrano.noc.ucla.edu 169.232.25.8 22 0 NA 0 0 0 0 NA 0 0 0 R14 NA NA 0 0 NA 0 0 0 0 NA R14 NA 0 0 NA NA 0 0 NA NA NA R14 0 0 NA NA 0 0 0 NA 0 0 R14 NA NA
R15 ag-beacon.engr.ucsb.edu 128.111.149.134 11 NA NA NA NA NA NA NA NA NA NA R15 NA NA NA NA NA 0 NA NA NA NA R15 NA NA NA NA NA NA NA NA NA NA R15 NA NA NA NA NA NA NA NA NA NA R15 NA NA
R16 darkness.nss.udel.edu 128.175.2.48 26 0 NA 0 0 0 NA NA NA 0 NA R16 NA NA NA 0 NA 0 NA 0 0 NA R16 NA 0 NA NA NA NA NA NA NA NA R16 0 0 NA NA NA 0 0 NA 0 0 R16 NA NA
R17 transducer.nss.udel.edu 128.175.13.112 497 0 0 0 0 0 0 0 0 0 0 R17 0 0 0 0 0 0 0 0 0 0 R17 0 0 0 0 0 0 0 0 0 0 R17 0 0 0 0 0 0 0 0 0 0 R17 0 0
R18 verdi.udel.edu 128.175.13.135 502 0 0 0 0 0 0 0 0 0 0 R18 0 0 0 0 0 0 0 0 0 0 R18 0 0 0 0 0 0 0 0 0 0 R18 0 0 0 0 0 0 0 0 0 0 R18 0 0
R19 faranth.ci.uiuc.edu 192.17.24.169 90 0 NA NA NA NA NA NA 0 0 NA R19 NA NA NA 0 0 NA 0 0 0 NA R19 0 0 NA NA NA 0 0 NA NA NA R19 0 NA 0 NA 0 0 NA NA 0 0 R19 NA NA
# Hostname IP Address RRs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9   S10 S11 S12 S13 S14 S15 S16 S17 S18 S19   S20 S21 S22 S23 S24 S25 S26 S27 S28 S29   S30 S31 S32 S33 S34 S35 S36 S37 S38 S39   S40 S41
R20 jhereg.ncsa.uiuc.edu 141.142.2.55 154 NA 0 0 NA 0 0 NA 0 0 0 R20 NA NA 0 0 0 0 0 0 0 NA R20 NA 0 0 NA NA 0 0 NA NA 0 R20 0 NA 0 0 0 0 NA NA NA 0 R20 NA NA
R21 multicast.chpc.utah.edu 155.101.3.100 16 0 0 0 0 0 NA 25 0 NA 0 R21 0 0 0 0 0 0 NA 0 0 0 R21 0 NA 0 ** 200 0 0 0 NA 98 R21 0 0 66 22 0 0 0 9 0 NA R21 NA NA
R22 ebc.mc-beacon.utah.edu 155.98.194.254 23 0 183 NA 0 0 0 0 0 0 0 R22 183 0 NA 0 0 0 0 0 0 0 R22 0 0 NA ** 0 0 0 0 0 5 R22 0 0 0 206 0 0 0 185 0 0 R22 NA NA
R23 eng.mc-beacon.utah.edu 155.98.127.254 22 0 NA NA 0 0 0 0 0 0 0 R23 NA NA NA 0 0 0 0 0 0 NA R23 0 0 NA 0 0 0 0 NA 0 ** R23 0 0 NA NA 0 0 0 ** 0 0 R23 NA NA
R24 park.mc-beacon.utah.edu 155.101.127.30 20 0 0 NA 0 0 0 NA 0 0 0 R24 NA 0 NA 0 0 0 0 0 0 0 R24 0 0 NA NA NA 0 0 NA 0 NA R24 0 0 0 NA 0 0 0 NA 0 0 R24 NA NA
R25 mbone-test.cs.wisc.edu 128.105.40.15 22 0 0 0 0 0 0 NA 0 0 0 R25 NA NA 0 0 0 0 0 0 0 0 R25 0 0 0 NA NA 0 0 NA 0 NA R25 0 0 NA NA 0 0 0 NA 0 0 R25 NA NA
R26 lipas.tv.funet.fi 193.166.16.119 78 0 0 NA 0 0 0 NA 0 0 0 R26 0 NA NA 0 0 0 0 0 0 0 R26 0 0 NA 0 NA 0 0 0 0 0 R26 0 0 NA 0 0 0 0 NA 0 0 R26 NA NA
R27 hank.ornl.gov 192.31.96.42 13 NA NA NA NA NA NA NA NA NA NA R27 NA NA NA NA NA NA NA NA NA NA R27 NA NA NA NA NA NA NA 0 NA NA R27 NA NA NA NA NA NA NA NA NA NA R27 NA NA
R28 nfc1.grnet.gr 194.177.210.213 567 0 0 0 0 0 0 0 0 0 0 R28 0 0 0 0 0 0 0 0 0 0 R28 0 0 0 0 0 0 0 0 0 0 R28 0 0 NA 0 0 0 0 0 0 0 R28 0 0
R29 beacon.noc.dren.net 138.18.250.20 489 0 0 0 0 0 0 0 NA 0 0 R29 0 0 0 0 0 0 0 0 0 NA R29 0 0 0 0 0 0 0 0 0 0 R29 0 0 0 0 0 0 0 0 0 0 R29 0 0
# Hostname IP Address RRs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9   S10 S11 S12 S13 S14 S15 S16 S17 S18 S19   S20 S21 S22 S23 S24 S25 S26 S27 S28 S29   S30 S31 S32 S33 S34 S35 S36 S37 S38 S39   S40 S41
R30 usul.es.net 198.128.1.31 56 0 0 NA 0 0 0 0 0 0 0 R30 0 NA NA 0 0 0 0 0 0 0 R30 0 0 0 NA 0 0 0 0 0 NA R30 0 0 0 44 0 0 0 21 0 0 R30 NA NA
R31 noc.maxgigapop.net 206.196.176.2 25 0 0 0 0 0 0 0 0 0 0 R31 0 0 0 0 0 0 0 0 0 0 R31 0 0 0 ** 0 0 0 0 0 76 R31 0 0 0 32 0 0 0 16 0 0 R31 NA NA
R32 ecu-beacon.ncren.net 128.109.58.21 74 0 0 0 0 0 0 0 0 0 0 R32 NA 0 0 0 0 0 0 0 0 0 R32 0 0 0 ** 0 0 0 NA 0 225 R32 0 0 0 NA 0 0 0 53 0 0 R32 NA NA
R33 rtp-beacon.ncren.net 128.109.230.21 25 0 32 NA 0 0 0 0 0 0 0 R33 34 NA NA 0 0 0 0 0 0 0 R33 0 0 NA ** 0 0 0 0 0 111 R33 0 0 NA 0 0 0 0 5 0 0 R33 NA NA
R34 freebird.wind.surfnet.nl 192.87.110.80 51 0 NA 0 0 0 0 NA 0 0 0 R34 0 NA 0 0 0 0 0 0 0 NA R34 0 0 0 0 NA 0 0 0 0 0 R34 0 0 0 0 0 0 0 NA NA 0 R34 NA NA
R35 beacon.zebi.nl 192.87.78.202 51 0 NA 0 0 0 0 NA 0 0 0 R35 0 0 0 0 0 0 0 0 0 NA R35 0 0 0 0 NA 0 0 0 0 0 R35 0 0 0 0 0 0 0 NA 0 0 R35 NA NA
R36 ag.bccs.uib.no 129.177.120.154 111 0 0 0 0 0 0 NA 0 0 0 R36 0 0 0 0 0 0 0 0 0 0 R36 0 0 0 0 NA 0 0 0 0 0 R36 0 0 NA 0 0 0 0 NA 0 0 R36 NA NA
R37 beacon.karen.ac.nz 210.7.46.250 115 0 0 0 0 0 0 NA 34 0 0 R37 0 NA 0 0 0 0 0 0 0 0 R37 0 0 0 0 NA 0 0 0 0 0 R37 0 0 0 0 0 NA 0 NA 0 0 R37 NA NA
R38 kutil.karen.ac.nz 210.7.46.41 114 0 7 0 0 0 0 NA NA 0 0 R38 0 0 0 0 0 0 0 0 0 0 R38 0 0 0 0 NA 0 0 0 0 0 R38 0 0 0 0 0 NA 0 23 0 0 R38 NA NA
R39 vv2.ap-accessgrid.org 130.102.78.179 140 0 0 0 0 0 NA NA NA 0 0 R39 0 NA 0 0 0 0 0 0 0 NA R39 NA 0 0 NA NA 0 0 0 NA 0 R39 0 0 NA 0 0 0 0 NA 0 0 R39 NA NA
# Hostname IP Address RRs S0 S1 S2 S3 S4 S5 S6 S7 S8 S9   S10 S11 S12 S13 S14 S15 S16 S17 S18 S19   S20 S21 S22 S23 S24 S25 S26 S27 S28 S29   S30 S31 S32 S33 S34 S35 S36 S37 S38 S39   S40 S41
R40 Unresolvable 11 NA NA NA NA NA NA NA NA NA NA R40 NA NA NA NA NA NA NA NA NA NA R40 NA NA NA NA NA NA NA NA NA NA R40 NA NA NA NA NA NA NA NA NA NA R40 NA NA
R41 Unresolvable 8 NA NA NA NA NA NA NA NA NA NA R41 NA NA NA NA NA NA NA NA NA NA R41 NA NA NA NA NA NA NA NA NA NA R41 NA NA NA NA NA NA NA NA NA NA R41 NA NA

Central Loss | Local Loss | Fract Loss | Central RTT | Local RTT | Central Jitter | Local Jitter | Beacon Info | History | Previous History

Diagnosing problems with your multicast setup | Contributed code and patches

Jitter is statistical variation in delay, measured in milliseconds, and represents short-term network congestion.

The "RRs" column is the count of RTP Receiver Reports received from each SR during the previous interval. For any given interval, the count of reports should be approximately the same. If your Beacon's report count is much lower than the others, it means your Beacon has only recently joined the multicast If you know you Beacon has been running for some time, it may be showing router-level multicast problems, which is why the option was included in this release of the Beacon. If your Beacon is joining and leaving and joining and leaving, this it what that would look like.

Please share your comments, questions, bug reports, concerns, and feedback with us via the Beacon listserv. Please note this list can only be posted to by SUBSCRIBERS, in order to keep it spam-free. Non-subscriber email is automatically discarded. You can subscribe to the list by sending an email to "majordomo /at/ dast.nlanr.net", with "subscribe beacon /at/ dast.nlanr.net" (with real "at" signs, of course) in the body. This list is publicly archived at http://archive.ncsa.uiuc.edu/lists/beacon.

Another way to contact us is to use the DAST contact webform.