From tony@lava.net Tue Feb 4 02:31:56 2003 From: tony@lava.net (Antonio Querubin) Date: Mon, 3 Feb 2003 16:31:56 -1000 (HST) Subject: [Mbone] duplicated multicast streams Message-ID: I was wondering if anybody else is seeing some multicast streams spewing out duplicated packets. Some stats from what IPTV is seeing for the NASA TV stream are below. This started some time last week. The previous time this happened Worldcom/UUNet traced it to some kind of problem on their network. This time around I haven't been able to get a response out of them. Does anybody have a good current contact at Worldcom who knows multicast? ----- Session RTP Audio - NASA TV (MPEG-1) Winsock interrupt 2046 Session RTP Audio - NASA TV (MPEG-1) to 224.2.145.37/28848 2005 Packets received overall 3538941947 Last RTP Timestamp 2546104 Bytes received overall RTP data from 128.223.91.191/1722638253 via 128.223.91.191/28848 Academic User Service ( 0 PDUs lost 2005 PDUs processed 796 PDU duplicates 1207 ADUs delivered 0 PDUs queued 0 ADUs queued 2115 Jitter QOS parameters: Tx: configured Best Effort RX: configured Best Effort RTCP_Protocol Rcvd: 66 Looped back: 0 SRs: 23 2 Pins, Time: 0:01:03 Running MPA/90000 Connected MPEG Audio queue = 1974 ms Audio Target = 2000 ms Audio Jitter = 40 ms Stride = 1.0000 Render: 44100 Hz 16 bit stereo 192000 bits/sec Session RTP Video - NASA TV (MPEG-1) Winsock interrupt 8881 Session RTP Video - NASA TV (MPEG-1) to 224.2.231.45/54302 9337 Packets received overall 3538972107 Last RTP Timestamp 9571839 Bytes received overall RTP data from 128.223.91.191/52699210 via 128.223.91.191/54302 Academic User Service ( -77 PDUs lost 9337 PDUs processed 3383 PDU duplicates 5949 ADUs delivered 3 PDUs queued 0 ADUs queued 1222 Jitter QOS parameters: Tx: configured Best Effort RX: configured Best Effort RTCP_Protocol Rcvd: 55 Looped back: 0 SRs: 17 2 Pins, Time: 0:01:03 Running MPV/90000 Connected MPEG Video queue = 2264 ms Queue packets = 86 Queue Head = 5619365 Free Bufs = 1210 1878 Frames Received 101 Frames dropped Short term drop rate: 0% 758800 bits/sec