[c-nsp] sup720 - is using 'mls rate-limit unicast cef receive' wise/recommended?

[Andrew Fort]

Hi guys,

What feels like an eternity ago, when installing WS-SUP720 boxes  
(i.e., w/PFC-3A's), we found that 'mls rate-limit unicast cef  
receive' really helped the RP when you carefully aimed smartbits  
interfaces at it (i.e., packetstorm the interface addresses with any  
sort of traffic you like).  It helped with keeping the box from  
dropping routing protocol adjacencies and the like.  My impression  
from the documentation is that this command will limit the rate of  
stuff being sent from the SP through for the RP's examination (to see  
if the traffic is worthy of actually going to IOS' "IP Input" function).

My question is, do other people use this?  I've not seen mention of  
it here.  If you do, what values of the rate and burst size (I use  
"40000 10") do you use?.  Is this a part of undocumented folklore for  
these boxes?

Is this a command useful on WS-SUP720 only? (i.e., on SUP720-3B or  
3BXL is it just unnecessary to do this?).

-andrew