show ip int brief ” A summary of the IP status and configuration of the IP interfaces.
show ip interface ” Displays a complete set of information on all the IP interfaces, including the configuration, status of each interface, and detected errors.
ping ” Uses ICMP to test connectivity of a remote interface.
The trace command output characters :
msec ” The round trip time in milliseconds .
* ” A timed out request.
? ” An Unknown packet type.
Q ” A source quench.
P ” The protocol is unreachable.
N ” The network is not reachable .
U ” The port is not reachable.
H ” A designated host is not reachable.
no ip domain lookup ” Allows you to use only a host table on the router for DNS.
show hosts ” Displays the host names table.
show ip access-list ” Displays the access lists configured on installed IOS software.
show ip route ” Displays information from the routers IP route table.
ip helper-address ” Converts broadcast messages for specific protocols into directed broadcast or Unicast messages.
show controllers ” Output shows the current state of the physical interface including errors and collisions.
ip name -server ” This command followed by the IP address or addresses of DNS servers sets the DNS servers used by the Cisco IOS.
