My MPLS cloud is running 7613 for core and Agg devices and 6524 in my access rings. How do I test convergence in terms of milliseconds. Do I require a Traffic Generator or can I achieve this using any softwares?. Since core rings with TE-FRR gives convergence less than 50 ms there are no packet drops, hence it is very critical to understand what is the exact convergence timings..
If you want to test convergence end to end, you can send UDP from one side and sniff it out on the other. Linux's "hping2" or "hping3" utility can create almost any type of traffic with certain delay between the packets. (i.e. 1 ms)
After the test you can know precisely how many ms your network was down - i.e. how many UDP packets you have lost.
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