01-19-2018 11:16 PM - edited 02-13-2018 10:26 AM
Edgerouter Lite Random Slow Download Speeds, upload fine.
I am having this same issue in the below link, and as a result an XKCD momment. (https://xkcd.com/979/):
Edit: (Maybe this is connected?)
I don't see a spoiler tag, so I will post my unit's config on pastebin.
It seems they are having issues with forum post editor?
v1.9.7+hotfix.4 (It's been software updated multiple times over the last 2 years)
Simple office network. 24 port, dumb, Gb cisco switch, comcast business modem, ER-lite
ETH0 is the internet, ETH1 is the port to the switch.
Advertised speed: 100Mb/20Mb. Comcast Business
Randomly, once or twice a month, the network devices on the inside of the network cruise at 10Mbps download,
and the normal 22Mb upload. These were checked via speedtest to comcast and speedtest.net servers. Normal
speed is about 120Mb/22Mb.
>Plugging into the modem directly will usually restore full download speed to a single device.
>Rebooting all network devices won't always fix it.
>No major usage as reported in the ER-lite3 bandwidth usage graph, or CPU usage during this event.
>Tried two models from comcast, and one SB6183.
>Comcast techs out multiple times to trace the lines back to the poles.
>Replaced network cables between modem and the switch with a new, molded CAT6 cable.
Link speed always shows 1Gb on all router ports.
>Invoked Plenish lore to drive evil spirits from the network setup and into the comcast technician.
If anyone can tell me where the "bad" is, I'd appreciate it. There is a hope that it's simply
something stupid I've done in the device configuration. I appreciate any help or advice.
All the best,
01-27-2018 01:43 PM - edited 01-27-2018 01:43 PM
Even if no one knows, I'd appreciate any advice on how I might generically go about further testing
and verification of the problem's source.
All the best.
01-27-2018 03:05 PM
01-27-2018 03:39 PM
01-27-2018 03:47 PM - edited 01-27-2018 03:50 PM
To me as well.
This is a business connection, but Comcast has recently pushed back that they don't see anything
on their network. In the past they claimed to have seen signal issues. Last call, I was adament they
set up monitoring and a T2 rep called to confirm monitoring was setup. The claim was they didn't see
any obvious issues from the modem's signal parameters, while on the phone, and the downsteam
slowdown was still happening.
I recently ran iperf3 on the edgelite to test bandwith and got simmilar results to what was
had via speed test on network-connected machines in browser. The only connections involved
in that iperf3 test are: modem -> a replaced, molded cat6e wire --> router. So, it's the router,
comcast, or other darkforces are conspiring against plans which involve having a nice internet.
Downsteam randomly slows, so onward I go playing the game of "who-dun-it".
01-27-2018 04:11 PM
01-27-2018 05:54 PM - edited 01-27-2018 05:54 PM
Like a pathping?
I didn't see any odd latency on pathping when reaching to google and a few other test destinations.
01-27-2018 05:57 PM
02-13-2018 10:25 AM - edited 02-13-2018 10:33 AM
Chasing this at the momment:
According to the edgelite, it's auto negoatiated at 1Gb full duplex on eth0 connected to the modem.
I'm waiting for comcast to get back to me and see if anything is down negotating on their modem's
end. Mind you, this has happened across 3 different brands of modem, so it must be something funny
the edgelite is doing.
All I can do is order something that isn't an edgelite, I suppose, for testing.
Refresh: iperf3 is crap when the rest of the downsteam network is bad, so it MUST be between
the ethernet link from the router to modem. This cable has been replaced 3 times with diffrent,