Re: can we find out whether the router is fragmenting the packet
You can configure an access-list for the source and destination and then do an IP Packet Detail Debug on the ACL.
access-list 100 permit ip host 10.1.1.1 host 10.2.2.1
deb ip packet 100 detail
Also, watch out for the CPU spike when you run debugs. Running Debug IP Packet detail without an ACL can melt down the router based upon the traffic at that time. So, it is highly recommended that you configure an ACL and be specific as possible and then run the debug against the ACL.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...