Re: [gentoo-user] Re: Assigning an IP in AP mode

[Grant]

>> > BTW, can I assign IP addresses on the same subnet to the 2 wireless
>> > interfaces in my system if one of them connects to the WAN and the
>> > other to the LAN?
>
> Yes and no. (see below).
>
>> You probably don't want to do that. It will give you two connected
>> routes for the subnet, and only the one with the better metric will be
>> used, so you wont be able to communicate with hosts on the other
>> interface. You could probably setup bridging, but IMO it would almost
>> certainly be better to just use different subnets.
>
> YES; Depending on how your "subnet" and what netmask(s) you use. Routinely
> a given class C (for example)  is broken down to more smaller
> address spaces (subnets) and not the x.x.x.0-255 range of a
> typical class C addressing scheme.
>
> Avoid asymmetrical routing:
> https://my.stonesoft.com/support/document.do?docid=1377
>
> You need to read up on this and understand things before getting
> fancy on subnets. Router jocks do this all day, every day. Cisco
> use to have some fabulous docs on the net, but I do not think
> they are available any more without a support contract.
>  I.E. typically folks subnet on the class C boundary
> (for example; 192.168.44.x) as it is cleaner and easier
> to configure.  But if you break down a Class C to smaller subnets,
> actually they are different subnets, so the real answer is
> NO, unless you want routing instability or want to use ugly hacks,
> or handle by the port/service with something like netfilter/bridging/etc.
>
> There are tools on the net to help you figure out how to break down
> a typical Class C network, to various smaller subnets.
>
>
> hth,
> James

Got it, thank you James.

- Grant