Ip address 239.255.255.250 ?

[Modelworks]

I am trying to troubleshoot some network issues with a embedded box connected to my home network. One thing I don't understand is when it powers on for the first time it sends these packets for about 5 minutes before being able to be used.

"192.168.0.6","239.255.255.250","SSDP","M-SEARCH * HTTP/1.1 "
"192.168.0.6","192.168.0.255","NBNS","Registration NB RSO1234<00>"
"192.168.0.6","239.255.255.250","SSDP","M-SEARCH * HTTP/1.1 "


I looked up the ip address 239.255.255.250 and it says that it is reserved for special use, but I can't find any definition on what special use that is.

The IP address of the box is 192.168.0.6 and the router is 192.168.0.1 which it never tries to contact until several minutes after the above process has several errors like:
224.0.0.251","MDNS","Standard query ANY RSO1234.local, "QM" question ANY RSO1234._smb._tcp.local
192.168.0.6 SMB Session Setup AndX Response, NTLMSSP_CHALLENGE, Error: STATUS_MORE_PROCESSING_REQUIRED


Thanks !

 

[imagoon]

I didn't know either but I dug this up:

http://www.nthelp.com/upnpscrewup.htm

It appears to be the address that universal plug and play responds to.

Edit: Another link about upnp:

http://help.lockergnome.com/general/239-255-255-250-Port-1900--ftopict18953.html

 

[Crusty]

You're dealing with multicast in that address range, so keep that in mind when doing your troubleshooting.

 

[spidey07]

239.x.x.x is the private multicast IP range. Just like 192.168.x.x and the others are used for private networks.

It's trying to "find" something by multicasting.

 

[theevilsharpie]

Your embedded box is looking for a UPnP device.

 

[bruceb]

You need to disable or turn off the UPnP on the embedded box or in the router.