@Lar4ik wrote: When a device disappears from the local network, it only has access to the Internet and does not ping on the local network. For example, I cannot send youtube video to smart TV, because the TV is no longer recognized on the local network. I think this is the case in the special IB2 firmware for Internet-booster. Thats why disabling the booster does not give anything. I am sorry but it's getting even more confusing for me. As of my knowledge there is no special firmware for IB2 when you have a booster. I used to own a booster too and it was never deployed with a special firmware. And how do you know that the IB2 disappears from the local network but still has internet access if you don't have access to it? By looking at the DSL light on the front as it stays solid white? You also say "no longer recognized on the local network". But it's not clear what you mean by that. The TV might not be able to connect to internet service or it reports the network link (cable) being unplugged/down? It is also possible that another device on your network is causing your issues. Do you have any other devices connected like different Routers, WLAN devices/routers, Powerline bridges etc? Are you sure you plugged everything properly and creating NO LOOP? I did actually visit a user once who reported that after certain amount of time his network is dead and only rebooting the IB resolves it for a while. It turned out the user plugged his compute into the IB and since he had a leftover cable he plugged port 2 and 3 with a loop cable. This surprisingly worked unless there was a Multicast/Broadcast packet sent in the network (e.g. from TV) which made the switch-loop cause the packet to loop and fully load the IB2 LAN side. As a result the box appeared "dead" and did not even respond to ICMP Ping any more. Can you draw a network diagram including all your devices you have connected? e.g. [IB2]
|- Ethernet -> [Ethernet Switch xy] --> [PC2]
| \----- [PC2]
|- Ethernet -> [TV]
|- Ethernet -> [Swisscom TV box]
|- Ethernet -> [Booster] It might also be handy to upload pictures here showing all cables and devices and where they are connected - e.g. pictures from the back of your IB2 with all cables connected showing where those cables are going to (which devices, Ports, Bridges, Access-Points...) Make absolutely sure you do not create a loop. Networks are organized in Star-Topology. A switch or Router (4-Port Switch built-in into your IB2) is always connected to an end device like a PC, Laptop, TV-Box or TV. It might also be connected to another Switch. where more devices are connected. But NEVER EVER connect port x to port y on the same switch with a cable. Or connect two cables to the same switch like IB2 port 1 ---> Switch Port 1 IB2 port 2 ---> Switch Port 2 As this creates a loop and the data will flow on in this loop and fully load the network: IB port 1 --> Switch Port 1 --> Switch port 2 --> IB port 2 --> IB port 1... And yes, for the professionals here: I know about STP but the average home user doest not. EDIT: And as I write this I remember the IB2 supports STP. So what you can try too is to enable STP (Spanning Tree Protocol) on your IB2: Log on to your IB2 web interface at http://192.168.1.1/ Go to Network -> Settings and enable Spanning Tree Protocol (STP) at the bottom of the page This might help to resolve the problem in case you created a loop. It does not fix the problem but if it helps you will have to find the cabling issue in your network.
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