All things related to multicast

[Alan Crosswell <>]

As Emily Litella (Gilda Radner) used to say, "Never Mind."

I was seeing apparently alternating SAP announcements for the vbrick
proprietary and standards-based streams overlapping each other.  Once
I set my vbrick for 1500 kbps mpeg encoding, turned off the proprietary
system stream (cip:19:1) and turned on rtp it seems to play just fine
in iptv viewer.  I had earlier sync problems between audio and video that
caused the iptv viewer to crap out in a bad way which was apparently a 
result of my using an unsual mpeg-1 encoding rate (of 2 Mbps).

Anyway, problem solved and I now have this robotics thing running MPEG-1
at 1.5 Mbps. MPEG-2 at 5 Mbps, and Real surestream at 56K and 300Kbps:-)
Plenty of time too as kick off is 10am tomorrow!

Attached, below is an example of Northwestern's SAPs flip-flopping.
Marshall -- tell Joel to type cip:19:1 to turn off sending the
proprietary format stream and associated SAP:-)

Thanks all.

/a

nn2k-gw>sho ip sdr "CSPAN via Nwstrn U."
SAP Cache - 120 entries
Session Name: CSPAN via Nwstrn U.
  Description: VBrick streaming video
  Group: 233.0.103.30, ttl: 63, Contiguous allocation: 1
  Uptime: 2w0d, Last Heard: 00:00:05
  Announcement source: 129.105.153.48, destination: 224.2.127.254
  Created by: - 0050c200cbaa 1 IN IP4 129.105.153.48
  Phone number: 
  Email: 
  URL: 
  Media: video 4444 udp 32
  Media: audio 4444 udp 14
nn2k-gw>sho ip sdr "CSPAN via Nwstrn U."
SAP Cache - 120 entries
Session Name: CSPAN via Nwstrn U.
  Description: VBrick Streaming Video
  Group: 0.0.0.0, ttl: 0, Contiguous allocation: 1
  Uptime: 2w0d, Last Heard: 00:00:02
  Announcement source: 129.105.153.48, destination: 224.2.127.254
  Created by: - 00801940020317254998 1 IN IP4 129.105.153.48
  Phone number: My Administrator <My Phone >
  Email: My Administrator <My E-mail >
  URL: 
  Media: video 4446/1 RTP/AVP 32
    Media group: 233.0.103.30, ttl: 63
    Attribute: x-iptv-svr:video 129.105.153.48 file 1 loop
  Media: audio 4448/1 RTP/AVP 14
    Media group: 233.0.103.30, ttl: 63
    Attribute: x-iptv-svr:audio 129.105.153.48 file 1 loop
nn2k-gw>

/a