I have a feeling that question itself looks stupid but it is not. Please let me clarify.

I have dynamic DNS with BIND and NIS configured at my LAN and have laptop which I am using in both wireless and wired mode. I mean that sometimes I have to use wired interface to achieve higher throughput but most of time I don't need it and using wireless mode. Everything works great.

Issue is that I want both interfaces get same IP from DHCP. Just for convenient firewall setup.

If I add both hosts to dhcp in this manner

# bt wireless
  host bt {
  hardware ethernet 00:1f:1f:62:60:28;
  fixed-address 172.16.77.110;
}
# bt wired
host bt {
  hardware ethernet 00:14:22:b7:5a:de;
  fixed-address 172.16.77.110;
}

DHCP says logs following message

dhcpd: Dynamic and static leases present for 172.16.77.110
dhcpd: Remove host declaration bt-wired or remove 172.16.77.110
dhcpd: from the dynamic address pool for 172.16/16

Host records are added outside of any subnet, but it makes no difference if I put them there, effect is still the same.

This is not critical but either is not my whim because even if DHCP seems to work fine for that "bt" host, I cannot make connection TO it from remote machine anymore with this definitely incorrect DHCP config.

I'd be thankful if one spares a minute for advice about how to configure DHCPD correctly.

UPDATE. I realize that there's a soulution to assign different hostname in DHCP config but would like to use benefits of short host names.