networking - Does IPsec anti replay service also takes care related to reordering of packets?

Question

I am working for a anti replay window service for my project and while going through the document I can see that window size is maintained i.e top and bottom, could someone please help me in understanding that sequence number here has anything to do with ordering of packets, my understanding is any packet within the window range the receiver gets, it check(section A2.2. of RFC 4303:), does the integrity check and if it valid mark the index and fwd. Is my understanding correct ?

标签： networkingipsec