Re: [LCtalk] Problems with TCP/IP Connectivity

[Fokko van Duin]

At 00:30 +0200 26-04-2006, Eric Christensen wrote:
> Apparently my DLINK Wireless Router 624+ sends out some UDP frames for 
> SSDP (Simple Service Discovery Protocol - used for UPnP on your 
> network) on a regular basis. I don't know why but the second series is 
> killing the TCP/IP stack of the Lanbox.

We just tested it, but the 239.255.255.250 multicast SSDP UDP packets 
have absolutely no effect on LanBoxes. From your packet log, it's 
very strange that at about the same time that your LanBox is not 
working anymore, there are a lot of TCP checksum errors. Hmm 
something weird is going on at your place.

Try turning off UDP broadcasting of the LanBox (it's On in your log), 
and try turning Off UPnP.

The only issue we know of, is with "smart" 10/100BT switches. Be 
aware that some ethernet switches are NOT compatible with 10BT 
devices like the LanBox (some are even not compatible with other make 
10/100BT switches!). Maybe the 4 port switch in your D-Link is 
"Smart" and turns off the port to the LanBox as it detects a 
broadcast storm?

Fokko van Duin,
CDS advanced technology bv,
http://www.lanbox.com/