[LEDE-DEV] Routing two interfaces on same subnet

Wed Jul 6 15:26:43 PDT 2016

If both are in the same network it should be fine. If both are in 
different networks, then you cause trouble.

-------- 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: 6.7.2016 09:05:41
> Ok Thanks Tobias,
> I will try to implement it.
> So if user plugged ethernet to the internet provider router and wifi
> is also connected, they will be no problem?
>
> 2016-07-06 2:16 GMT+02:00 Tobias Welz <tw at wiznet.eu>:
>> Bridging in client mode is not supported by most devices.
>> That's why you need a "pseudo bridge" with relayd here:
>> https://wiki.openwrt.org/doc/recipes/relayclient
>>
>>
>> On 05.07.2016 23:14, Baptiste Clenet wrote:
>>> 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,
>>>>>>>>>
>>>
>>
>> _______________________________________________
>> Lede-dev mailing list
>> Lede-dev at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/lede-dev
>
>