Re: Airport Express - network issue
- From: Alan Browne <alan.browne@xxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 14 Dec 2011 20:24:06 -0500
On 2011-12-14 18:01 , David Empson wrote:
Alan Browne<alan.browne@xxxxxxxxxxxxxxxxxxxxx> wrote:
I bought an Apple "refurbished" AirPort Express ($15 off).
I set it up with the main purpose for now being to stream music to my
living room or rec room sound systems from the iMac/iTunes using the
iPhone as the remote.
Per the instructions, I should be able to set it up such that my
existing WiFi/router (D-Link) which is hard wired (ethernet) to my iMac
is the datalink to the AE.
However, I can only stream with the WiFi(AirPort) on the Mac on (I
normally had this off).
I tried setting it up manually for this as well as with the 'setup
sequence' provided in the AirPort utility. When the Mac WiFi is off,
there is no connection to the AirPort Extreme.
The problem is likely to be you have set the wrong "Connection Sharing"
mode in the Airport Express. It should be configured for "Off (Bridge
mode)". That way, the Airport Express is on the same LAN as your
existing Ethernet and WiFi devices. As you already have a WiFi router
you should be able to turn off WiFi in the Airport Express.
I'll check that tomorrow. The Apple instructions were ambiguous (or too subtle) at some points during the setup.
If you had set it to "Share a public IP address" and its Ethernet port
is configured as the source of the Internet then the Express is doing
NAT between Ethernet and WiFi, and normally won't accept streamed audio
from what it regards as the Internet.
Note that when configuring the AirPort extreme it was hardwired/ethernet
to the router and iMac.
How is the Airport Express connected now?
WiFi only. The ethernet connection was temporary (for config per Apple's instructions).
If it is only using WiFi to
get to the main router, there is another possible explanation:
Some routers have independent local Ethernet and WiFi networks (mainly
as a security measure, on the assumption WiFi is being used for guests
while Ethernet is for your permanent infrastructure). The router must be
configured to bridge those two networks in order for Ethernet-connected
computers to be able to access devices on the WiFi network. There may be
a setting in the D-Link router to control this.
I do have a "guest" login on the Router with a different name/WPA.
There may also be a compatibility issue: if the D-Link router doesn't
forward multicast packets between Ethernet and WiFi then Bonjour won't
It does per D-linl. However in the setup I left "Bonjour" off (at least on one round, it may be back on again after the dummy-setup.
work and the Ethernet-connected computer won't be able to see the
Airport Express. The only way to fix this may be to replace the D-Link
router with one that correctly handles bridging of multicast packets.
Or run an Ethernet cable to the Airport Express.
Defeats the purpose. I use the AE in two locations and move it as needed. Neither location has ethernet cables.
"I see!" said the blind man as he picked up his hammer and saw.
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