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[bryce0lynch]

I'm posting this for Google search purposes, in the hope it helps someone else.

I have a simple set-up: a DIR-655 with 2 devices plugged in to it. The Plex Media Server runs on Ubuntu Linux and acts as the DLNA server to a PS3 DLNA client. Both are hard-wired with ethernet cables to the DIR-655. In this set up the PS3 has trouble discovering the PLEX server via DLNA. A 'search for DLNA devices' on the PS3 fails to return the PLEX. Eventually, after some strange time interval ranging from 2-30 minutes, the Plex server will show up on the PS3's list.

I attached a simple ethernet switch to the DIR-655 and then attached the PS3 and Plex/linux server to it. The PS3 now finds the Plex DLNA server INSTANTLY ... without even having to scan for servers.

It appears that the DIR-655 is trying to be 'helpful' in some way by filtering some sort of traffic; multicast/igmp I assume. There don't appear to be any settings in the GUI to alter the Multicast/IGMP/DLNA/UPnP behavior in the LAN ... other then "turn UPnP on."

Note that this is hardware B1 and firmware 2.00NA.


Personal Rant:
I spent three months trying to figure this out. I'm a network engineer with 20 years of experience and I've been making 6 figures for the last 10 years.
A) I spent too much time trying to figure out PS3/PLEX settings.
B) I should have simplified the environment much sooner.
C) I strongly disapprove of the idiot who decided to implement the 'helpful' filtering feature.

[FurryNutz]

 Is Multi-Cast Streaming ENABLED one the router? If not, then normally some DLNA traffic maybe blocked between LAN device that stream.
It's recommended to use a external Gb Network switch in most cases as this eliminates any un-necessary router processing or mis-configuration between LAN devices that don't need any router management or connections thru the router.
You might update to v2.03 or v2.07NA if your NA region. However since you got it working with a switch. Keep whats loaded for now since it's working.
You'll need to refer to Sony and the PLEX Mfr for information and support for these devices.
 DLNA works for me using this router with Multi-Cast Streaming enabled.

Good Luck.