I have several PI's with rasbian installed on it. When i try to ping an raspbian pi from another raspbian pi, i only get

ping radio.local

ping: unknown host radio.local

When i do the same on my ubuntu, it works. When i ping raspbmc.local (another pi) from an raspbian pi, it also works:

PING raspbmc.local ( 56(84) bytes of data.

64 bytes from raspbmc.local ( icmp_req=1 ttl=64 time=9.52 ms

I have installed the package avahi-daemon on the radio pi.

Because i can ping the raspbmc.local, but not the radio.local, i guess there is a configuration issue on the radio.local.

  • Did you check if the hostname really is 'radio'. A ps should show something similar to this: 6722 ? S 0:00 avahi-daemon: running [radio.local] – Dirk Thannhäuser May 13 '14 at 11:30
  • Are you able to ping from radio.local Pi to the other?<br> Is there any chance of a firewall on the radio.local blocking the ping/responsible for it not replying to pings? – Davey Jun 13 '14 at 10:16

radio.local is a ZeroConf address, it's known only when zeroconf (or avahi) is installed. your ubintu has it, but Raspberry Pi has not.

instead of radio.local you should use the IP address to specify in your ping commands. for example in PING raspbmc.local ( 56(84) bytes of data. the IP address is -- use it with ping command to access your Pis.

instead of

ping raspbmc.local


ping 192.168.0.XX

where XX is the number you can find using ping command on ubuntu.


You must have installed some kind of mDNS software. Otherwise your hostname will not be registered unter the .local domain. That's not raspbian specific issue. Check if your mDNS service is really running. If not try the following:

Install mDNS service on you Raspberry Pi:

sudo apt-get install libnss-mdns

That's the magic and should result to what you expected. After the installation type

ps ax

You should have the avahi-daemon running similar to this:

 6722 ?        S      0:00 avahi-daemon: running [radio.local]
 6723 ?        S      0:00 avahi-daemon: chroot helper

You should also check your hostname. Maybe that it's not 'radio'.

  • Unfortunately libnss-mdns is already installed (on both). the avahi-daemon also runs on both. – user2706510 May 13 '14 at 13:00
  • ok, did you check gereral connectivity? Is you Pi reachable via direct IP Adress? ping xxx.xxx.xxx.xxx. And vice versa are you able to ping any host in your network from your radio Pi? – Dirk Thannhäuser May 14 '14 at 10:15

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