Cisco’s Packet Tracer works for very basic labs, but it has so many irritating small things that are missing, that it causes more frustration than nice experiences if doing anything involving anything more than the absoulte basic configurations. It does have one strong point, and it is CPU and memory usage, compared to emulating router hardware, which this article will be mainly about.
I was working with a PPP Cisco lab yesterday in the network lab at uni. Three routers in a serial link triangle, running OSPF. The lab instructions said to break PPP (for some reason, it was a “challenge” CCNA lab, so.. the breaking of the link and observing the behavior was already done in the previous lab, but oh well), so we did.