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Forum Discussion
UPNP not working on RBR20/RBS20 in AP mode
I currently use my RBR20/RBS20 with a HomeHub3000 router from Bell Aliant. The Orbi is in access point mode. The bell router does all routing. This system has worked fairly flawlessly except today whe...
Retired_Member wrote:
The switch model is a D-link DGS108.
There's that darn IGMP Snooping:
https://us.dlink.com/en/products/dgs-108-8-port-unmanaged-gigabit-metal-desktop-switch
"Optimizes multicast data streams". WTF???
(Interesting that the official Data Sheet does not mention IGMP Snooping.)
This all sounds too good to be true
https://en.wikipedia.org/wiki/IGMP_snooping
But, I cannot reconcile this enthusiasm with that paragraph in the article on UPnP:
https://en.wikipedia.org/wiki/Universal_Plug_and_Play where it says:
If IGMP snooping is enabled on a switch, or more commonly a wireless router/switch, it will interfere with UPnP/DLNA device discovery (SSDP) if incorrectly or incompletely configured (e.g. without an active querier or IGMP proxy), making UPnP appear unreliable.
Typical scenarios observed include a server or client (e.g. smart TV) appearing after power on, and then disappearing after a few minutes (often 30 by default configuration) due to IGMP group membership expiring.
IGMP snooping is really common. So far, I have not found many inexpensive switches that do not appear to have this feature, such as:
https://www.netgear.com/media/GS105v5_GS108v4_DS_tcm148-76758_tcm148-108734.pdf $40 on Amazon, or
Why does a '308' cost half what a '108' costs???
Before attempting to run an ethernet cable, I would probably drop $22 (+tax) on a Netgear GS308 and see 'anything changes'.
(I do not trust Netgear to have left IGMP Snooping out of the product and simply not mentioned anything about it. But I am a cynical old fart.)
There is always a (dim) chance that support that either Synology or Naim has an opinion on IGMP snooping. Since Naim relies entirely on UPnP, they might be the place to start.
uPnP is something that gets disabled while in AP mode on the Orbi system and only be a pass-thru on the Orbi system.
Also be sure you disable WiFi Private Address feature on Apple devices while at home. This feature seems to cause problems for users.
- Thanks for the reply - yes, private Wi-fi address is disabled.
Only other thing I can think to try is hook the Synology into the Ethernet port of the RBR to ensure it’s not a topology issues. That doesn’t make sense to me and won’t be ideal for my setup but I’m trying to eliminate variables.
I’d suspect it’s a Synology problem but the Naim seems able to find it. Sounds like I should stick with streamers that use SMB.When UPnP is confined to the Local Area Network (LAN), the WiFi router is not involved (neither the HomeHub3000 nor the Orbi [in router or Access Point mode]). UPnP is a mechanism for devices on the LAN to "find each other" with no user setup:
https://en.wikipedia.org/wiki/Universal_Plug_and_Play
All those multicast packets simply flow through the routers like any other multicast or broadcast packets.
That Wikipedia article mentions potential issues with IGMP snooping. Is there a switch in the network somewhere?
UPnP is mentioned in the Orbi User Manual for the situation where customers want a device on their LAN to be available from the internet. (which is not the case here). That feature available when the Orbi is in router mode is not pertinent to this discussion.
I suspect the issue lies with the Synology.
Rather than depend on UPnP to find the Synology server, would it be possible to use the Synology IP address (which I would 'assign' so that it doesn't change)?
Yes, there is a switch in the network (two actually). An example topology would be Fiber in to Homehub 3000 (Wifi disabled, router only). Port 1 as Orbi RBR20, Port 2 as line to 8 port ethernet switch (NAS connected to this), Port 3 to POE switch for IP cameras. None of these switches are managed switches.
Port 2 has the switch which then goes to the NAS and the Naim. Devices on Port 1 cannot see devices on port 2 over UPNP protocol.
If I put that 8 port switch on the ethernet out of the Orbi RBR20 (So Port 1 -> Orbi -> 8 Port Switch), devices on the Orbi can see the UPNP server (but the switch is still in the equation).
Either way, something is blocking UPNP when going across router ports. I'm just not sure how to address. To be clear - the above topology is unfavourable from equipment layout and orbi position but I tried it to eliminate the variable.
Any thoughts on how to eliminate whatever is blocking UPNP communication? I cannot tell the Naim to connect directly to the server - its UPNP only. The Bluesound Powernode is much easier as I can just SMB to the server. Naim requires UPNP on the device to control it, or smartphone to be able to remote control it. I desire both.