Ethernet unstable on Giga Connect Box

OlliB · 2022-05-18T14:58:02+00:00

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OlliB

Dear all,

I have a strange problem with the LAN connection on my Giga Connect Box. I recently changed to bridge mode/IPv4 plus a MIkrotik RB4011 router. I experience now frequent disconnects from UPC Box to my router each about 3-5 sec in length, and about 50-100 times per day. Other connected equipment (like the UPC TV box) works fine without any such disconnects. Disconnects are clearly logged on the Mikrotik.

Troubleshooting done - used different ports on both sides, different Ethernet cable, tried router mode on Gigabox, even tried to run two Ethernet cables in parallel. Same problem. CAT6 cable length is about 20cm, connects with 1Gbps without issue.

It issue is a problem as these disconnects impact e.g. video conferencing.

Any ideas?

Daniele_Sunrise

OlliB The signal quality of your modem is ok, also no interruptions were registered in the network.

Please run a speed test (two-three measurements) in bridge mode and report back here with CNLAB UID for further analysis.

Greetings
Daniele

OlliB

Hi Daniele, thanks so much for checking!

Speed is not the problem, Internet connection is very fast. Just did a check, 889/105 Mbit/sec max, so fully up to my expectations. UID is 2072812251555177.

The problem is the LAN connection between Gigabox and my Mikrotik router. MT log from the last hour below. 3-5 sec disconnects which disconnect then also video calls etc.

I cannot find any error in Gigabox log, but I guess issues on the four Ethernet ports are simply not logged.

08:53:52 interface,info ether2-wan link down
08:53:56 interface,info ether2-wan link up (speed 1G, full duplex)
08:56:51 interface,info ether2-wan link down
08:56:57 interface,info ether2-wan link up (speed 1G, full duplex)
09:00:14 interface,info ether2-wan link down
09:00:18 interface,info ether2-wan link up (speed 1G, full duplex)
09:04:47 interface,info ether2-wan link down
09:04:51 interface,info ether2-wan link up (speed 1G, full duplex)
09:12:37 interface,info ether2-wan link down
09:12:41 interface,info ether2-wan link up (speed 1G, full duplex)
09:22:54 interface,info ether2-wan link down
09:22:59 interface,info ether2-wan link up (speed 1G, full duplex)

Maybe a hardware problem? Power supply?

Daniele_Sunrise

OlliB It may be that there were interruptions with your router, which did not come from the UPC modem. I found some information about it in Google. It is about a QuickConnect window.

What is also strange, are the transfer rates (red) which collapse again and again. This can come from an antivirus, or from network inspection tools on the router.

Greetings
Danielke

OlliB

Hi Daniele,

I have re-done the speed tests over the weekend again, this time connecting the laptop directly to the Gigabox and personal firewall disabled. Result is now fine as far as I can see, no more spikes. I checked also the Ethernet connection from Mikrotik to Gigabox by pinging 192.168.100.1 from the MT, as expected I got timeouts when the link is shown “down” in the MT log.

The good news - I think I got the problem now fixed by putting a little noname switch between Gigabox and MT. I have no more timeouts anymore (since 2 days). Looks like the Gigabox and MT are incompatible in some way. I will monitor the situation for a couple of more days.

Best regards
Oliver