I am setting up a NAC CAM and CAS 4.7.2 OOB setup in a test environment (NAC failover for CAM and CAS), and I am seeing some strange SNMP issues. I am testing with a 3750 switch (12.2(53)SE1) using SNMP v2 and v3 since v3 and accessing the switch port configuration in the NAC manager is extremely slow. I click OOB Management -> devices -> switch XXX and it takes several minutes for the port listing to display. Then sometimes it comes up quickly but a 'show debug snmp' on the switch shows that it isn't polling the switch so it apparently starts pulling the ports page from cache, but I can see now logic in how it does this.
Q1) When and why does the ports page pull cached info?
Q2) Why is SNMP queries operating so slowly with NAC 4.7.2 OOB?
Here is my test switch/NAC SNMP config (with pseudo names and fake passwords):
Did anyone ever find a solution to this issue? I'm having the same problem.... it takes minutes to open the ports on a switch in the CAM. It shouldn't take minutes to manage ports for each switch, it should take less than 10 seconds...
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...