All things related to multicast

[Markus Buchhorn <>]

At 21:25 17/01/01 -0600, Tony Rimovsky wrote:
>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.
[...]
>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.

Is it really the *rate* of SA's that is a problem? Or the total number of
SA's? The issue seemed to be cpuhogging when the routers had 50k SA state
to deal with under the pressure of a normal background multicast flow.
Would it perhaps be better to limit the size of the total SA state? I
wonder what would happen if the 50k SA state has been slowly built up (over
days, rather than minutes).

Just wondering aloud, no experience or evidence :-)

Cheers,
        Markus

Markus Buchhorn, Faculty of Engineering and IT,          | Ph: +61 2 61258810
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