DHCP Server - Domain

RouterOS General
1

Hello all,
how this is working? Is DHCP-Option 15?

/ip dhcp-server network set [find] domain="internal"

I would like to ping “device hostname”.domain without adding as DNS Static.
Not sure if Domain= should be the router (eg.: router.lan) or the local domain (like .internal / .lan / home.arpa)

Sorry for dumb post, lacking of knowledge.

2

Domain is domain name … without leading dot. So if your host names are e.g. “host.my.domain.tld”, then you should set domain property of DHCP server network entries to domain=my.domain.tld

3

Thanks sir.
This is useful also in case of non-public domains like domain=home.arpa ?

4

This setting sets DHCP Option 15 (the domain name that client should use as suffix when resolving hostnames via the Domain Name System) … and it’s entirely up to clients on how they use them. Definitely nothing to do with DHCP server or DHCP client.

So normally yes, <my.domain.tld> can be “home.arpa” or “local” (not sure about the later, some OSes have problems with domain names which don’t contain at least one dot).