I use this image for resolving boot2docker instances by name.

Run with the --net=host when starting.

After running docker-machine start <name>, run this:

export AVAHI_HOST=docker-default
docker run -d --name avahi --net host --restart always -e AVAHI_HOST=${AVAHI_HOST} danisla/avahi:latest

Then you should be able to ping docker-default.local