Multicast DNS greatly improves local area networking experience. It takes installing another package and adding a word to a configuration file in Arch linux: wiki page.

$ ping boyarka.local
PING boyarka.local ( 56(84) bytes of data.
64 bytes from ( icmp_seq=1 ttl=64 time=109 ms
64 bytes from ( icmp_seq=2 ttl=64 time=7.96 ms

Update: no need for MDNS with OpenWrt router.