Wireshark comes with a wide range of cool analysis tools. But I have yet to find a way to measure jitter and delay  over a network node that works with any kind of traffic. You might be able to utilize Cisco's IP SLA and graph the results using SNMP. But that will require two Cisco routers: one on each side of the node in question. And without any nodes in between. This might not be your topology. And you won't measure the real traffic as IP SLA generates its own traffic for measurement. With TAP devices and the method described below, you will be able to measure directly on TCP or UDP traffic going through the node.

Læs mere: Using TAPs to graph nodal delay with Feedgnuplot