arp -a equivalent
From: Siniša Bandin <hidden>
Date: 2019-01-19 20:43:51
Hello! There is one thing I am missing from old "arp" command: "arp -a" used to give both symbolic name and numeric address (if resolver is working, of course). Now, with "ip neigh" I can get only one at the time, so I have to issue two commands if I want to check if for eg. a host is alive and I don't know it's IP address (issued by DHCP), but it's name is registered in (dynamic) DNS. First "ip -r neigh" to see what is the hostname (I don't like to remember 100's of hostnames, it's easier to ask Linux for a list), then ping/dig/whatever to resolve that name to IP... Example output: Good # arp -a name.domain.tld (192.168.188.34) at aa:bb:cc:dd:ee:f1 [ether] on wlan0 Not so good # ip neigh 192.168.188.34 dev wlan0 lladdr aa:bb:cc:dd:ee:f1 REACHABLE # ip -r neigh name.domain.tld dev wlan0 lladdr aa:bb:cc:dd:ee:f1 REACHABLE I would expect "ip -a neigh" to behave just like "arp -a", but would be happy with any way to have names and addresses listed together (new option, combination of options, ...) Is there any way this could be implemented? Thank you! -- Srdačan pozdrav/Best regards, Siniša Bandin