A  core switch maintains an ARP table that maps a devices MAC address to its IP Address. You can easily display this table by entering "show ip arp" but it isn't sorted and on a large network will contain thousands of entries. I wrote a simple pyth...

I have been building several 4451 routers and 4507R+E switches recently. Right after the devices boot I run a script to create the configuration. The devices have only been up for a couple minutes when the "crypto key generate rsa mod 2048" command i...