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Troubleshooting Router config on a fusion DSL line

Posted: Tue May 10, 2022 5:13 pm
by bikestation
I've got a TP Link router sitting behind a Sonic supplied SR515AC gateway.

Its been working for about a year, then abruptly cut out. I've tried everything to restore it, but getting some odd results, 2 sonic phone techs have been unable to help, referred me here. I've confirmed that the connection works perfectly with the SmartRG.

When I connect to my supplied router, it pulls an IP, routes traffic for about 1-2 minutes and then cuts out and the router shows theĀ "No Internet" Light. Every.Single.Time.

Smart RG at 192.168.42.1
Router at 192.168.0.1

Things I've tried:
> dynamic IP Configuration, Modem assigns router traffic via DMZ.
> dynamic IP modem in bridge mode, router grabs an IP directly from Sonic.
> Switched service to static IP
> Swapped Ethernet cable between the modem and the router
> swapped the router itself (slightly different version, but both TPLink)

Each time the TPLink router (confoundingly) gets a signal for a little while, and can even route traffic to devices below it - for a little while - proving Its set up properly enough to get assigned an IP - but then cuts out.


WHY: I would like use our router to enable use of a VPN for remote troubleshooting, and to ensure consistent equipment is used across a number of sites we manage.

Re: Troubleshooting Router config on a fusion DSL line

Posted: Tue May 10, 2022 5:58 pm
by virtualmike
Could the TP Link be failing when it warms up?

Re: Troubleshooting Router config on a fusion DSL line

Posted: Tue May 10, 2022 6:23 pm
by bikestation
Tried two separate routers, with the same result. seems unlikely

Re: Troubleshooting Router config on a fusion DSL line

Posted: Tue May 10, 2022 9:37 pm
by ngufra
Does the tp link works on its own?
without connect its wan port connect two computers and try to get some traffic.
e.g. 192.168.42.2 is computer1, 192.168.42.3 is computer2.
share a folder and copy it across the network.
If this does not work, you will know it's not related to the sonic router.

Re: Troubleshooting Router config on a fusion DSL line

Posted: Wed May 11, 2022 10:39 am
by bikestation
Router routes traffic just fine.

Update, after insisting up one side and down the other that the network was fine as long as the router was taken out of they chain, Sonic contacted me back (Kudos to them for keeping an eye on the circuit!) and said they now believe there's a line problem.

Bummer, but glad there's progress (maybe) towards a resolution.