Re: ICMP router advertisement (ipv4)

[Tim Woodall <debianuser@woodall.me.uk>]

On Mon, 10 Apr 2023, Jeremy Ardley wrote:

> On 10/4/23 12:49, Tim Woodall wrote:
> > And it doesn't forward packets from new ips either, it just silently
> > drops them.
> >
> > I don't know how the router learns ips but I suspect it's something to
> > do with DAD,
> I don't know about your router specifically, but here in Australia the 
> Network Termination Device (in my case a cable interface) has a gig ethernet 
> port that a conventional 'router' connects to (e.g. the typical wifi device 
> usually with some ethernet ports). On the NTD side the router sees an 
> ethernet style interface that it can broadcast discovery packets onto. The 
> NTD then routes the packets to the ISP via some cable protocol.
>
> You can simply plug your computer ethernet direct into the NTD and do all the 
> link negotiations you want. No extra hardware required.
>
> In my case I have a dual port armbian device connected to the Network 
> Termination Device to act as router to my network.
That's how I used to do it when with Andrews and Arnold in the UK.

Unfortunately, I don't seem to have that option any more. My cable modem
appears only to expose a layer 4 connection.

Previous version of my router appear to have a "modem mode" but that
doesn't exist in my version.