All things related to multicast

[Heonkyu Park <>]

Hello, My name is Heonkyu Park who is a PhD student in KAIST (Korea).
I have monitored RTP/RTCP packet to measure packet loss rate between each 
partic
ipants.
I could see 154 sessions during collection period (about 68 hours), and also 
fou
nd that 449 multicast address were exist related to each media type.
I tried to capture RTP/RTCP packet on all 449 addresses using rtpdump.
However, only 4 multicast addresses sent the RTP/RTCP packet.

Why do this happened? According to SDP in sdr, many sessions were supposed to 
us
e RTP/RTCP.

Any help would be appreciated.

Heonkyu Park.

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Heonkyu Park(박헌규)                  E-mail : 

Ph.D. Candidate, CS Dept., KAIST      T) +82-42-869-3554, 8718
System Architecture Lab.              http://cosmos.kaist.ac.kr 
Major, Army, Republic of Korea        http://cosmos.kaist.ac.kr/~hkpark
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