All things related to multicast

[Tony Rimovsky <>]

Does anyone have advice on a good rate limit value?  Some earlier mail from 
Matt indicated that 50k SA's in 5 minutes had caused a problem.

We were playing around with synscan (the ramen tool that generates the 
traffic), our m40 and rate limits this evening.

As an experiment, we set the rate to junipers absolute minimum (30,520 bps 
with a burst size limit of 1500 bytes/sec).  Using 255 groups on each of 
two sources, I generated 510 SA's in about 3 seconds (sending from NCSA 
(AS1224) and visible at ACCESS-DC (AS 5640).  All the SA's made it to 
ACCESS-DC and as far as I can tell, that rate generated no problem for 
abilene.  I am obviously leery of pushing this experiment too far.

For those who are interested, here is the juniper config piece:

policer msdp-police {
    if-exceeding {
        bandwidth-limit 32k;
        burst-size-limit 1500;
    }
    then discard;
}
term msdp {
    from {
        protocol tcp;
        port msdp;
    }
    then {
        policer msdp-police;
        log;
    }
}
term default {
    then accept;
}