All things related to multicast

[Philip Pishioneri <>]

On 2002-06-16 2:39 PM, Mark Boolootian wrote:

> Why aren't the SAP announcements from the VBrick showing up in
> sdr or the IP/TV content manager iptvhost.uoregon.edu?   
Looks like sdr doesn't think that the announcements are valid because of 
the session id.  While running it with debug enabled it writes

> non-digit in session ID
> Problem with packet. Dumping...

An entry from such an announcement looks like [IP address mangled to 
protect the innocent]

> o=- 0007df0006b5 1 IN IP4 132.236.888.999

The SDP RFC (2327) says the session id is a numeric string (I'd guess 
base-10 numbers?), while the VBrick ones look hexadecimal (e.g., 
"0007df0006b5").

The bandwidth values also seem suspect (but probably not a basis for 
discarding).  One of ours has

> b=AS:5689900

which is in bits per second, but the RFC lists the bandwidth-value as in 
kilobits per second (probably powers of 2, not 10).

-Phil