On Tue, 9 Mar 2021 08:12:47 -0500 rhkra...@gmail.com wrote: > On Tuesday, March 09, 2021 12:12:40 AM Felix Miata wrote: > > David Wright composed on 2021-03-08 22:37 (UTC-0600): > > > I realise that, but if your service were to become unsatisfactory, > > > then before you complained, you'd want to check that it's not your > > > modem at fault. Would you expect your spare modem to work, > > > because it has a different MAC from what's expected by the ISP's > > > end of the line. > > > Whenever I get a mind to, I call my ISP, tell them I'm changing > > modems, and what the new MAC is. It gives me some confidence it's > > still useful. If there's a problem they or I think a modem switch > > might shed light on, I do the same. > > I have DSL service, and a spare modem that I've occasionally put in > service (for testing the "main" modem) and have not had to notify the > ISP. (They were both provided by the ISP (Earthlink).) > > I don't know if cable modems would work the same -- I don't know if > the ISP sees the MAC address on a DSL line. >
I used to change routers without telling anyone, but that was years ago. As an anecdote, I recall a BT service/router which literally would not work if it detected another NAT on the LAN. It was in a client's network, and I had to reconfigure things to work without the Debian server acting as a firewall. If it had been my network, the wretched thing would have gone back instantly, my network runs through two NATs and that isn't negotiable. -- Joe
