All things related to multicast

[Jeffry Handal <>]

Zenon,

We saw traffic come in for multicast group 224.2.127.254 from all 3 
sources. I cannot tell at this time how much traffic but we are still 
getting it.

Regards,


Jeffry J.Handal
Convergence Specialist, M.S.E.E., P.E.
University Networking and Infrastructure - LSU
200 Computing Services Building
Baton Rouge, LA 70803
Office: (225)578-1966
Fax:    (225)578-6400

On 9/18/2012 10:58, Zenon Mousmoulas wrote:
> Earlier today, certainly between 12:00-12:30 EEST (09:00-09:30 UTC), a
> traffic spike was noticed here on the SAP ipv4 multicast group, just
> like the good old times ;)
>
> What follows is a partial view from GRNET's border router, showing three
> sources in University Twente in the Netherlands sending an aggregate of
> 52 Mbps on average during this time (but probably peaking much higher
> during shorter spikes).
>
> Top-talkers Src IP Addr ordered by packets:
> 2012-09-18 11:37:02.110  3317.910 UDP      130.89.191.173       16(
> 0.0)  249.8 M( 6.9)    6.2 G( 0.3)    75299   14.8 M    24
> 2012-09-18 11:54:32.980  2390.780 UDP      130.89.191.172       12(
> 0.0)  203.7 M( 5.6)   12.4 G( 0.5)    85202   41.6 M    61
> 2012-09-18 11:54:04.860  2342.120 UDP      130.89.191.174       11(
> 0.0)   96.4 M( 2.6)    5.1 G( 0.2)    41155   17.5 M    53
>
> Top-talkers Dst IP Addr ordered by packets:
> Date first seen          Duration Proto       Dst IP Addr Flows(%)
> Packets(%)       Bytes(%)         pps      bps   bpp
> 2012-09-18 11:33:50.660  3633.100 UDP       224.2.127.254      194(
> 0.0)  550.0 M(15.1)   23.7 G( 1.0)   151376   52.2 M    43
>
> Top-talkers Dst Port ordered by packets:
> Date first seen Duration Proto Dst Port Flows(%) Packets(%) Bytes(%) pps
> bps bpp
> 2012-09-18 11:33:50.660 3633.100 UDP 9875 195( 0.0) 550.0 M(15.1) 23.7
> G( 1.0) 151376 52.2 M 43
>
> I wonder if anyone else saw this -- it would just be good to know (for
> our Ops at least).
>
> Kind regards,
> Z.