Most of the interface statistics in "show interface" are MAC level (hardware) statistics and cannot be reset except by rebooting the sensor.
The higher level statistics, such as "show statistics virtual-sensor" can be reset by appending the keyword "clear" to the request. In that case, the current statistics are displayed and then reset internally. The next invocation will show statistics since the "clear". One of the statistics is "Seconds since last reset" and you can use it to verify that your reset is taking place.
Further info. You can apply the "clear" attribute to the Show Interfaces command and reset everything but the Management interface. The appropriate math is being done under the covers for the data interfaces.
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...