Forums>Support, Queries, Bug Reports>SimpleService does not transmit UDP mult ... 

Yuki Ohashi said:

Zach Libby said:

Yuki Ohashi said:

Hello,

When I deploy a SimpleService sample to the device which did porting of MF and operated it, I have the problem that does not transmit UDP multicast.
Therefore, it cannot discover a device even if I run a SimpleServiceClient sample on an emulator.

However, when I deploy a SimlleServiceClient sample to a device and operated it, it transmits UDP multicast for discovery. And it was able to receive service if I ran a SimpleService sample on an emulator.

Is there a problem for porting?
Would you teach what I should investigate if there is it?

I'm using NETMF v4.1b Refresh #3 and RTIP stack.
A core of the devices is ARM926EJ-S.

Thanks in advance...

Hello Yuki,

It sounds like the device is not getting the Probe request.  Can you verify that the device is receiving the Multi-cast probe?  And what kind of network are you on?  Is the device on the same subnet as the emulator/PC?  Can you get a connection with the emulator running the service and the device running the client?

Thanks,
Zach

Hello Zach,

Thanks for your continued supporting.
I confirmed due to your advises. Please find following:

>Can you verify that the device is receiving the Multi-cast probe?

Yes. I confirmed the buffer data of Multi-cast probe.
And I find failed pattern. Please find below comments.
#  Please confirm "Failed pattern" comment.

>And what kind of network are you on?
>Is the device on the same subnet as the emulator/PC?

Current network is local network structed switching hub.
Please find details as following:

- Network
 - Device
   - IP            :192.168.0.10
   - Mask          :255.255.255.0
   - DefaultGateway:192.168.0.1

 - Emulator on PC
   - IP            :192.168.0.13
   - Mask          :255.255.255.0
   - DefaultGateway:192.168.0.1

- Success pattern
 - Service Server (SimpleService): Emulator
 - Service Client (SimpleServiceClient): Device.

 1. Client sends multi-cast probe.
 2. Server have unicast connection.
 -> Receiving service.

- Failed pattern
 - Service Server: Device.
 - Service Client: Emulator.
  # Replacing server and client.

 1. Client sends multi-cast probe.
 -> There is no response from server.

>Can you get a connection with the emulator running the service and the device running the client?

Yes. It looks no problem.

Meanwhile, my first problem is "why I can't check "Hello" multi cast
message on server
operated device by WireShark".
So I had doubt that multi cast message is not sent from device or reached to PC.
Is my doubt correct? Please let me know your opinion.

In addition, if you find new queues about this issue, I appreciate you
to let me know
your idea. I'll check my environment due to your idea again.

Thanks in advance,
Yuki