We need a firewall on our VOIP traffic. Our provider says the device must have a maxium latency of 2ms. Having searched the spec in the Cisco docs on this device and having found nothing on it's latency I wondered if anyone on here might know?
You need to know how much traffic and what type of traffic goes through your firewall to understand what could be causing latency. You also need to check basic things like interfaces.
If you have Cisco switches you can configure Netflow to collect all this information if you do not you can configure netflow on the ASA but it has its limitations regarding not giving out real time statistics based on the fact that it needs the connection to be built and when it is teardown it gives out info to build a report.
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...