Re: [lwip-users] Problems on Class-B network

[Stephen Cowell]

Hey Simon...
There is also an NTP client running... using
SNTP.  They have it set to 0.0.0.0, so it's disabled.
I've set my unit up same as theirs, with my
PC as the gateway... works fine.  I just don't
have access to a router that will do the 173
block... most of them are tied to the 192 block,
since that's an easy way to limit the possible
number of clients connected.

Here's their full setup, for completeness:
IP  173.31.147.224
GW  173.31.146.1
Mask  255.255.254.0

I don't have a screenshot of the attempted ping.
__
Steve
.

Stephen Cowell
Project Manager/Engineer
Plasmability LLC
Office (512) 267-7087
Cell  (512) 632-8593
www.plasmability.com

On 4/11/2016 3:09 PM, Sg wrote:
> Stephen,
>
> As far as I know, class B network should work OK. I'm running devices 
> with "strange" subnets, too, and they have no problem.
> Can you post an example IP setting of the device, gateway and client 
> trying to ping the device?
> Does the device have multiple netifs or only one?
>
> Simon
>
>
> Stephen Cowell wrote:
>
> > I've got an embedded FTP product out in the
> > field built on lwIP 1.4.1... so far so good... but
> > now a customer has a problem getting one to
> > work (static IP) on a class-B (172.31.xxx.xxx)
> > subnet.  Raw API, no OS... running FatFS
> > and FTPD on Atmel SAM4E16E.
> >
> > I have not been able to obtain/set up a similar
> > situation here yet... I have attached my PC to
> > my device with a crossover cable and set it to
> > the customer's Gateway IP... the mask is
> > 255.255.254.0, so it's not the full 1mib address
> > space.  My sim FTP works fine... but at the customer's
> > site (overseas, of course) when they set this IP/etc
> > they can't even ping the device.  For me, it seems
> > unusual that for every static IP the customer sets,
> > they also set a unique gateway... not sure why.
> > The gateway is pingable from the drop to the device,
> > or at least that's what I've been assured.
> >
> > We are sending a replacement unit now... I just want
> > to confirm that this should work no problem on
> > the class-B subnet.
> > __
> > Steve
> > .
> >
> > Stephen Cowell
> > Project Manager/Engineer
> > Plasmability LLC
> > Office (512) 267-7087
> > Cell  (512) 632-8593
> > www.plasmability.com
> >
> >
> >
> > _______________________________________________
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