Introducing the Topology:
The show controllers command reveals whether the cable is DCE or DTE.
#show controllers serial 0/0/0
Interface serial0/0/0
Hardware is powerQUICC MPC860
DCE v.35, no clock
Interfaces:
By default all Serial and Ethernet interfaces are down.
The routing table will be empty.
Debugging:
Allows us to watch changes a router performs in real time.
For example, to observe routes being added and removed.
#debug ip routing
#undebug all (disables all debug commands). or
#no debug all. or
#un a. (short form)
Tags: 802.1q, study, vlan, switch, vtp, wan
