You will absolutely want to install your openSUSE with a working network connection (even if it’s a dummy connection). I’ve found that adding a working network device later is a lot of unnecessary work if you just make sure it’s active during install.
The issue isn’t whether your modem or router is an ADSL or not,
And am assuming that the router is providing an ethernet interface and a CAT5/6 or other common network cable is used to connect to your machine.
The only significant issue is whether something anywhere in your network (or on the other side of your ADSL router) is providing DHCP services.
If so, then configure your interface as a DHCP client.
If not, then you will need to know how to set up a static network configuration.
In most cases, even in what I might guess your situation is, you should configure and at least try configuring as a DHCP client. If that doesn’t work, then post again if you can’t figure out how to configure static networking.
Can you supply more details about your router (make and model)? Are you referring to a DSL connection where your computer connects using PPPoE perhaps? Can the router be configured to take care of the PPPoE connectivity? Assuming that you are referring to PPPoE, I’m not sure that the openSUSE installer includes the ‘rp-pppoe’ package needed to undertake manual configuration/connectivity like this. Another way around this might be to use another computer to share it’s working internet connection (eg using two wired NICs or create wireless hotspot).
“adding a working network device later is a lot of unnecessary work”
That is reason why I ask this.
Yes, it is PPPoE connection?
I forget to say that, sorry.
This is new router and ISP forbid some settings, I can call ISP to change settings, but talking to them is …
“I’m not sure that the openSUSE installer includes the ‘rp-pppoe’ package needed to undertake manual configuration/connectivity like this.”
If this is true, then I will call ISP?
No problem with this, I just try without that.
BTW, after Windows, and some other Linux distros, I think openSUSE is best OS!
You may not be able to avoid this situation if you can’t set up an intermediately device to handle the PPPoE and NAT. It’s not hard to do afterwards though.
“I’m not sure that the openSUSE installer includes the ‘rp-pppoe’ package needed to undertake manual configuration/connectivity like this.”
If this is true, then I will call ISP?
No problem with this, I just try without that.
Sound like you only have a single desktop machine to connect to the ISP via PPPoE. So, it will probably just be easiest for you to proceed with install, and configure the internet connectivity later. Follow the links provided in this post:
BTW, what I recommend you do (if you can afford it and technically inclined to do so), is to add a router behind your existing DSL Modem to perform NAT and PPPoE duties, and allowing you to connect your computer(s) to a LAN using DHCP like this…
The router option is only a possibility if you have reasonable working knowledge of networking. For example, I have a familiarity with mikrotik routers, so could implement this approach comfortably. If you don’t have the resources or knowledge then probably best to install without a network, or consider installing in an environment where you do (eg workplace, friend’s house, or library)
If that don’t work, then configure network after install.
Well, wicked does not support this and installer does not support/include NetworkManager (to my best knowledge) so you cannot have working Internet during installation. You will need to configure NetworkManager after installation.