r1#show ip arp 10.1.123.100
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.1.123.100 1 0000.5e00.0101 ARPA FastEthernet0/0
What can we tell about the IP address 10.1.123.100 from this output?
You need to add multiple lines of configuration to the following interfaces on sw1:
Fa0/1, Fa0/2, Fa0/3, Fa0/5, Fa0/7, Fa0/8, Fa0/10, Fa0/13, Fa0/14, Fa0/15, Fa0/16, Fa0/17
Can you write a single-line interface range command to apply the changes to all of these interfaces at one time?
Answer: sw1(config)# interface range Fa0/1 – 3 , Fa0/5 , Fa0/7 – 8 , Fa0/10 , Fa0/13 – 17
This is a command that I use all of the time. Up until I started doing CCIE labs, I did not know that you could use this command to configure discontiguous interfaces at the same time. This is a great time saver in the lab as well in real life.
Hat tip to Steve. I used his answer because I wasn’t able to jump on a switch from where I’m at (other than a production switch and I don’t want to run even the most innocuous commands on a production switch if I don’t have to).