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Re: [lwip-users] routing over PPP using lwip

From: Eric Pooch
Subject: Re: [lwip-users] routing over PPP using lwip
Date: Wed, 13 May 2015 07:53:30 -0700

Did you use:

netif_set_default(), specifying the PPP interface?
For some reason you can't negotiate the netmask in lwip PPP, so you have to use 
that function.

Sent from my iPhone

> On May 13, 2015, at 1:59 AM, Sylvain Rochet <address@hidden> wrote:
> Hello Damien,
>> On Tue, May 12, 2015 at 11:33:23PM +0000, COOKE, Damien wrote:
>> We have a system that we are using lwip for our tcp engine.  It is a 
>> system without an OS running on ARMV9 hardware.  It has a tcp 
>> connection to a server and a ppp connection to a peripheral client 
>> device.  The tcp connection to the server is faultless and the PPP 
>> connection comes up fine we can see ping packets between the client 
>> and the system over the ppp connection but we are unable to send 
>> packets over the ppp connection.  I suspect a routing issue and was 
>> wondering if anyone else had seen something like this and if someone 
>> could guide me as to where I should be looking to find my issues?
> Which lwIP version are you using ?
> Which PPP link protocol are you using ? PPPoS ? PPPoE ? PPPoL2TP ?
> Are you trying to do SNAT ? lwIP doesn't support NAT at all.
> Is LwIP IP routing enabled ?
> Note that IP routing between Ethernet and PPPoS was recently fixed in 
> git master head.
> Sylvain
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