All things related to multicast

[Alan Crosswell <>]

Multicast working group BoF 7/18/05
 - Thanks to Kevin for chairing the group since its inception.
 - Campus IP TV distribution war stories
   - Northwestern (Tim Ward)
      - BPDUs from user machines cause spanning tree
        to flush all multicast CAM table entries resulting in CGMP
        snooping switches to flood multicast
      - Encoding MPEG4 at 2 Mbps
      - 20 or 24 channels using Videofurnace encoders and software
        players.
      - 4350 rooms.  2750 max viewership election night (1 CNN, 2 CNBC,
        3 Comedy Central).  Switches are polled for CGMP stats.
      - Students vote on channel lineup.
      - No set top boxes by choice.
      - Client controlled closed captioning now supported.
      - Schools of Communications/Journalism have a joint virtual
        channel.
      - videofurnace supports DRM for premium content.
      - licensing/franchise fees
        NBC offering direct deals for their lineup
   - Dartmouth doing 62 channels and wireless.
   - Cornell rolling out service this fall.
-> - ask Cornell/Dartmouth to present at a future JT.
   - AHECTA - American Higher Ed Cable TV Association.
   - Time Warner trial in San Diego using Realvideo w/multicast and DRM
 - High bandwidth multicast/bigvideo
   - 25 Mbps SD DV
   - 25 Mbps MPV (MPEG compressed HDTV) about 6 second encoding delay
   - 270 Mbps compressed HD
   - 1.2 Gbps uncompress HD
   - CPU problems we had with 30 MBPS DVTS transmission on the first 
hop router
 - IPv6 multicast
   - Abilene rolling out new JunOS release soon that supports embedded
     RP
-> - ConferenceXP Bob Riddle has a version from MSR that does v6 mcast
     that he can give out
 - Experiences with multicast snooping switches
   - Plugged my web page www.columbia.edu/~alan/igmp
   - Older CGMP switches (us, NWU) can't snooped IGMPv3
 - Multicast on wireless (802.11) segments
   - Just say no:-)
 - automatic tunneling
   - Greg Sheperd - AMT
   - e.g. for DSL/cable modem customers 
(Lea@Stanford
 interested)
 - Firewall w/multicast?
-> - Ask Debbie 
Fligor@UIUC
 - Anybody using PIM-BIDIR?
   - not in the room
 - ssmping
   - server and clients for testing SSM
 - Comments/Questions from Caren's tutorial

/a