ONT Type 300 LAN1 port intermittently drops

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gareth41

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#289044 9-Aug-2021 14:38

We moved into a brand new house, new subdivision, Chrous installed a Type 300 ONT. The first few days after installation we had quite a few link downs on the ONT LAN1 port (not pppoe related, this is the actual LAN port going down for a few seconds) - I assumed it was due to updates and the ONT rebooting itself. However after a couple months, still have same problem, although its usually once a week. It's just happened again just now and is a bit of an annoyance as I work from home a lot and causes Zoom calls and RDP sessions etc... to drop when it does happen. The router I'm using is a Mikrotik RB3011UiAS. ISP is voyager - but I don't think the router or ISP is the problem.

At our old place we had one of the older ONT's a Type 200 and using exactly the same router but configured for Spark, and we never had any disconnects, had link uptime of more than a month some times, the only time anything was reset was when we had powercuts.

Is this a known issue with the newer ONT's?

wratterus

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#2757273 9-Aug-2021 14:51

Swapped out the cable between the ONT & the router? Is it always negotiating gigabit on the router WAN? Can you swap in another router to test temporarily?

BMarquis

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Chorus

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#2757279 9-Aug-2021 15:14

This isn't a known issue (not one that I've seen)

As per last poster, best to swap out the ethernet cable and if you really want to, put a switch between the ONT and router to see which side falls over.

Otherwise - you could log a case with your RSP for us to swap out the ONT.

RunningMan

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#2757296 9-Aug-2021 15:44

Is the RB3011 firmware up to date? There was issues with several versions having port flapping issues which would look like this.

gareth41

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#2757761 10-Aug-2021 10:54

Thanks all, I haven't tried a different cable yet - will do that and see if it makes any difference. The firmware was also updated a couple months ago.

Lorenceo

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#2758064 10-Aug-2021 16:19

I ran into a (somewhat) similar issue at my last place. Had fibre installed via a gen 3 ONT. I was using the flat white Ethernet cable that came with the ONT at first, as that's what the technician connected during the install. It worked fine at 1Gbps initially, but about a week after the install I found I was capped to ~100Mbps. My router was reporting 100Mbps on its WAN port. After swapping to a different cable the issue vanished, never to return.