Hi,
i have RB2011UiAS with load cpu 100%
configured IPsec


no one can help you if you don’t give more information
need more info.
firewall / mangle rules, fasttrack enabled? what speed are your connections, etc


address-list LOCAL = 192.168.0.0/16
NOW, load CPU is normal, but what this been?
UPD: i have two MT (1 - major - CCR1016-12G, 2 - slave - RB2011UiAS. between thim configured IPsec. Load CPU have been on the slave MT. The major MT - normal.
I will recommend for testing disable everything except rules for IPSec,and take look how will go. And then if you really need rest of the rules..yee you can enable by care
Yes. I wanted this make by evening.
i had some thing similar when the dns remote request was on my cpu ran crazy.
http://forum.mikrotik.com/t/question-about-dns-allow-remote-requests/114988/3