multicast fails with network interfaces instead of IP

[nfo]

Environment: two laptops on MacOSX 10.5 Leopard, in the same local network on Wifi (interface "en1"). The two laptops have virtual network devices (VMWare/Parallels/VirtualBox).

If don't give any configuration to elasticsearch, the two nodes do not discover each other.
If I set network.host to en1 on each host, I get these errors on the master http://pastie.org/995083
If I set network.host to the actual IPs, the two nodes go in the same cluster.

[kimchy]

How do you specify the network.host to be en1? It should be _en1_.

[nfo]

I set network.host to _en1_. (was a typo)

[clintongormley]

No further reports of this in 3 years. Already fixed? Closing