Network Management
NetPath packet types
This article explains principles of how NetPath works.
First published date
3/19/2021 10:38 PM
Last published date
3/30/2022 1:21 PM
Overview
NetPath uses Type 11 of ICMP to determine hops and routes and encapsulates the TCP for the destination. It’s a graphical 'traceroute' application to test availability of a URL, analyzing points of latency/failure. Note that NetPath operates at the application layer and since it is a different type of traffic from traceroute, can vary in its results.
Product section
Network Performance Monitor
Resolution
NetPath uses a 3-way TCP handshake (SYN, SYN-ACK, ACK) to establish a connection, then immediately terminates the connection relying on the 4-way handshake (FIN-ACK, FIN-ACK) for termination.
This means that NetPath will not try to establish a connection with end devices (such as switches or routers) with other protocols such as SSH or SNMP. NetPath only checks for basic reachability to devices from the probe.
Note: Verify that ICMP Type 11 traffic is allowed while using NetPath.
This means that NetPath will not try to establish a connection with end devices (such as switches or routers) with other protocols such as SSH or SNMP. NetPath only checks for basic reachability to devices from the probe.
Note: Verify that ICMP Type 11 traffic is allowed while using NetPath.