[LEDE-DEV] Routing two interfaces on same subnet

[Baptiste Clenet]

Ok.
I've got a router with one ethernet port and wifi in STA mode. The
user which is going to use the router will be able to connect this
router to internet router either by ethernet or wifi.
So if he plugs ethernet and decide to connect his router by wifi also,
ethernet and wifi will be on same network (same subnet).
Is it clearer?
Currently, when I start my board, I've got this config even if
ethernet is unplugged (wifi STA connects automatically):
root at eisox:/# ip route
default via 192.168.0.50 dev eth0  proto static
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.85
192.168.0.0/24 dev apcli0  proto kernel  scope link  src 192.168.0.80

Then I can't ping my router because of the route on eth0
May I use a bridge in this set up?


2016-07-05 20:26 GMT+02:00 Tobias Welz <tw at wiznet.eu>:
> I think we need to know more about your setup, and what you want to achieve.
> Let's say we have LAN and WAN interfaces as ethernet ports, and also WIFI.
>
> Should the WIFI be in AP or in STA mode?
> Shall wifi be bridged to LAN or to the WAN interface?
>
>
> -------- Original Message --------
> Subject: Re: [LEDE-DEV] Routing two interfaces on same subnet
> From: Baptiste Clenet <bapclenet at gmail.com>
> To: Tobias Welz <tw at wiznet.eu>
> Cc: lede-dev at lists.infradead.org
> Date: 5.7.2016 19:33:02
>>
>> Wifi and ethernet are in client mode.
>> pseudo bridge with relayd? Can you describe a bit?
>>
>> 2016-07-05 19:24 GMT+02:00 Tobias Welz <tw at wiznet.eu>:
>>>
>>> Hi,
>>> it's just a little problem if you are in in client mode, then you need a
>>> pseudo bridge with relayd.
>>> If you use AP mode then you can just bridge LAN and WIFI together, which
>>> is
>>> the default anyway. A factory default will bring you to this setting,
>>> turn
>>> on wifi and you are done.
>>> Regards Tobias
>>>
>>> -------- Original Message --------
>>> Subject: Re: [LEDE-DEV] Routing two interfaces on same subnet
>>> From: Baptiste Clenet <bapclenet at gmail.com>
>>> To: Tobias Welz <tw at wiznet.eu>
>>> Cc: lede-dev at lists.infradead.org
>>> Date: 5.7.2016 19:15:42
>>>>
>>>> Hi Tobias,
>>>> I see, I tried to bridge them, but I got a problem, I'll try again.
>>>> Isn't it a problem if both interfaces are connected to same network in a
>>>> bridge?
>>>>
>>>> 2016-07-05 19:04 GMT+02:00 Tobias Welz <tw at wiznet.eu>:
>>>>>
>>>>> Hello,
>>>>> for me it looks a bit strange, why not put both interfaces together on
>>>>> Layer
>>>>> 2 - so bridge them together - which is the default anyway? It looks
>>>>> very
>>>>> strange to me, to split that stuff on layer 3 with the same subnet,
>>>>> which
>>>>> now need a lot of hacking to bring it to work again, which i personally
>>>>> would like to avoid in a production environment.
>>>>> For me it looks like a "wrong" approach - what is the special need to
>>>>> doing
>>>>> it in this way?
>>>>> What is the problem with using a bridge over these two interfaces which
>>>>> should just run out of the box?
>>>>> Regards Tobias
>>>>>
>>>>>
>>>>> -------- Original Message --------
>>>>> Subject: [LEDE-DEV] Routing two interfaces on same subnet
>>>>> From: Baptiste Clenet <bapclenet at gmail.com>
>>>>> To: lede-dev at lists.infradead.org
>>>>> Date: 4.7.2016 10:14:26
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> On my board, I've got a wifi and an ethernet interfaces on the same
>>>>>> subnet (192.168.0.0/24). Problem is if ethernet cable is unplugged I
>>>>>> can't use wifi anymore, see
>>>>>>
>>>>>> root at eisox:/# ip route
>>>>>> default via 192.168.0.50 dev eth0  proto static
>>>>>> 192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.85
>>>>>> 192.168.0.0/24 dev apcli0  proto kernel  scope link  src 192.168.0.80
>>>>>> Here, ethernet is unplugged and wifi connected to other router so I
>>>>>> can't use the wifi (ping failed in both direction).
>>>>>>
>>>>>> If I delete eth route, it works.
>>>>>> root at eisox:/# ip route del 192.168.0.0/24 dev eth0
>>>>>> root at eisox:/# ip route
>>>>>> default via 192.168.0.50 dev eth0  proto static
>>>>>> 192.168.0.0/24 dev apcli0  proto kernel  scope link  src 192.168.0.80
>>>>>> root at eisox:/#
>>>>>>
>>>>>> How can I can solve the problem?
>>>>>> I won't know the status of Wifi and Ethernet so I would like that both
>>>>>> can work if they are plugged.
>>>>>>
>>>>>> Or how to disable one interface is the other one is connected (like if
>>>>>> ethernet is plugged, allow only ethernet to work, if it is unplugged,
>>>>>> allow only wifi)
>>>>>>
>>>>>> Cheers,
>>>>>>
>>>>
>>
>>
>



-- 
Baptiste