GL-SFT1200 install udp-broadcast-relay-redux

Routers
1

I have a GL-SFT1200 and I am connected to it wirelessly. On the wan port I am connected to a network with creston equipment installed on it. If I you crestron toolbox it does not see the crestron equipment. why id this and is these settings in the GL-SFT1200 that I can set to make this work ?

==== Here is the result of a search - This is an explaination of the specific issue =====

Your GL-SFT1200 is acting as a router and creating a separate subnet, so Crestron Toolbox broadcasts never reach the Crestron devices on the WAN side. To make Toolbox see the equipment, you need the GL-SFT1200 to bridge (not route/NAT) between your Wi‑Fi and the upstream Crestron network.

Crestron discovery sends a UDP broadcast on port 41794 to 255.255.255.255 and relies on devices being on the same IP subnet.

In normal “Router” mode, the GL-SFT1200 puts Wi‑Fi clients on something like 192.168.8.x and its WAN on the Crestron subnet (for example 192.168.1.x), and it does not forward broadcast traffic between these networks

As a result, Toolbox discovery packets from your laptop never reach the Crestron LAN, so no devices appear

==== Then I asked if there was a solution and this returned =====

is there software or addon software that will allow "UDP broadcast on port 41794 to 255.255.255.255" to pass through ?

Yes, the udp-broadcast-relay-redux package for OpenWrt can relay UDP port 41794 broadcasts across interfaces without bridging the entire network. This keeps your GL-SFT1200 in router mode but forwards Crestron Toolbox discovery packets bidirectionally between LAN (your Wi-Fi) and WAN (Crestron network).

Installing the relay package

The GL-SFT1200 runs OpenWrt, so install via SSH or the web UI package manager:

opkg update opkg install udp-broadcast-relay-redux

======= This is where I have come to point of need help =====

I have done all of this and it is not working. The “udp-broadcast-relay-redux” is not istalling.

Can anyone assit with this issue ?

2

Hi

The "udp-broadcast-relay-redux" package is not available in the SFT1200 repository.
It appears to be available only on OpenWRT 23.05 and later versions, so it may not be usable on the SFT1200.

The Crestron Toolbox appears to support connecting directly by specifying the device's IP address. You may try this to see if this work or not.

4

The earliest incarnation of udp-broadcast-relay-redux is in Openwrt 19.07 and Immortalwrt 19.07.

5

It seems a bit odd that this package can't be found on archive.openwrt.org.

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But regardless, it doesn't appear to be supported on the SFT1200 running 18.06. :melting_face:

6

Can the Opal run Openwrt 19.07 ?

7

Thank you.

8

Thanks Will for the reply. This is part of crestron and I do use this. UDP doesn’t jump subnets so this setting work fix this specific issue. I need some SW inside the Opal to allow or tunnel the UDP traffic between subnet.

Are you aware of ny other way to do this ?

9

Can the Opal run Openwrt 19.07 ?

10

Unicast traffic should be able to transmit across subnets without any issues; only certain multicast and broadcast traffic cannot be forwarded across subnets.

The latter is usually only used for device discovery, whereas once the device is discovered, a connection should be established using unicast. Therefore, manually specifying an IP address to establish a connection should theoretically work without issue. However, it is possible that Crestron has its own unique way of operating.

You mentioned that the SFT1200 is connected to the upstream network via Ethernet (WAN port), so you might want to try using AP Mode. In this mode, the router will not create its own subnet; instead, it will remain in the same subnet as the upstream router.

11

The driver for the Opal switch merged into net-next in October, some time until we see full true Openwrt support:

Luckily the Opal has 128 NAND and 128 RAM, so there no rush for support as it’s not a limited storage device.