1 ping an ip address to test connectivity to see if you can reach a remote host.
2 perform a dns lookup to test if an internet name resolves to an ip address to verify that the dns server configuration is working.
3 display the routing table to identify what other routers the router is communicating with.
4 trace the routing path to identify any connectivity or congestion problems in the network.
5 reboot the router to enable new network configurations to take effect or to clear problems with the router’s network connection.
from the main menu of the browser interface, under the maintenance heading, select the router diagnostics heading to display the menu shown in figure 6-9.
