Felix Miata <mrma...@earthlink.net> writes: > Also ip a. Someday you may no longer have arp: > <https://dougvitale.wordpress.com/2011/12/21/deprecated-linux-networking-commands-and-their-replacements/>
Well, it's been about a decade since that was written but not much has changed. One issue is, ifconfig shows only one address per interface while you can today have more. I was bitten by this last year, I borrowed a port from what I thought was a co-worker's desktop switch. Turns out it was actually a router with the end result that my dev board somehow ended up with two IP addresses, one from that router and another from the general network. Connections didn't work that well but ifconfig showed everything was just fine and I had the expected ip address. Finally, ip addr showed the actual situation and ip addr del mumble and some other commands fixed my connectivity issues.
