Similar to the 1RN Rejoin time, the full network rejoin time measures the time for every router node to reconnect back to the border router device. This test is used to simulate a full power down scenario in the field, allowing estimation of the performance in an area where there is an elevated risk of the router nodes losing power. The full network rejoin test uses the same topology as the initial join time tests to avoid any possible changes due to a different network topology. Figure 5-7 shows a diagram of the full network rejoin test. All router nodes are reset and the time to rejoin the network is measured.

Figure 5-8 and Figure 5-9 show the rejoin time results using the setup above. The test is run using both a 50kbps and a 300kbps PHY.

Since the router nodes have already been configured during the initial join, the router nodes can retain the configuration and GTKs which makes the rejoin time faster than the initial join time. For maximize responsiveness and balanced mode configurations, the PHY does not make a big difference as the determining factor is still the protocol timers. However, at maximize scalability, since the protocol overhead is low, the protocol timers are no longer the only determining factor and increased data rate provides a noticeable improvement in rejoin time.