Intermittent slow speeds (~0.5Mbps) for 30s, Modem Mode, Normally 300Mbps+
I've seen similar posts to this one before, but they all either end without resolution, or after a VM member starts a private chat with the OP.
I get intermittent slow speeds on my VM 350 connection. Some days this will happen every 5-10 minutes, dropping the speed down to ~0.5Mbps, before returning back to ~full speed. Some days are without issue.
This happens on wired connections as well as WiFi.
I'm using Modem Mode, the router is an EdgeRouter X. Speedtests on the ER also show the same slowdown, so I'm fairly confident it's the VM hub.
Basically - Downstream should be between -6 and +10dBmV with an SNR above 34 and RxMER similar!
Upstream power should be between 34 and 51 dBmV at 64 QAM
There is a really good 'sticky' post that goes into all the technical side of it - but this is generally what VM looks for! - If your network log or BQM (see my signature) looks horrendous and all the levels look OK - they will usually still book an engineer as there is clearly a problem! This is why it is good practice to keep a BQM going!
Gave them a call, apparently there's a local issue currently due to performance improvements in my area. I doubt this is affecting the issue as I've had it for months, but they said no tests could be performed reliably while this work is taking place.
I'll try again on the 9th when it should be completed, if a rep doesn't appear here sooner.
Still having issues I'm afraid. The reboot seemed to help temporarily, though I restarted yesterday after the issue happened around 10am and problems persist today.
Running a traceroute on the Ubiquity Edgerouter (connected right to the VM router in modem mode) shows dropped packets in the same pattern as running it on my desktop connected to the ER, so I don't believe the ER is contributing to the issue.
Looking at the VM logs there are the same errors I've mentioned previously, but these have appeared intermittently over the last few days. The issue is present now and there are no error logs at this time.
Not too sure where to go from here, any help is appreciated!
Note: Ignore the big block of red in my BQM - I'd accidentally removed the ICMP response firewall rule 😉