MQX Software SolutionsのトピックRe: Incompatibility IP Address and default IP Gateway Adress on TCP/IP Stack

Incompatibility IP Address and default IP Gateway Adress on TCP/IP Stack

Angelillo — Fri, 28 Mar 2014 09:39:07 GMT

Hi,

I'm using Ethernet communication with my K70 over MQX 3.8.1. My ethernet configuration should be:

#define ENET_IPADDR IPADDR(10,4,33,50)

#define ENET_IPMASK IPADDR(255,255,240,0)

#define ENET_IPGATEWAY IPADDR(10,4,32,254)

But if the second number of IP Address is the same that the second number of IP Gateway Adress (in my IP configuration is '4') my application doesn't run correctly. If these numbers aren't equals, my application run perfectly.

Can anyone help me?

Thank you very much in advance,

Ángel G.

Re: Incompatibility IP Address and default IP Gateway Adress on TCP/IP Stack

Wlodek_D_ — Fri, 28 Mar 2014 10:45:32 GMT

Hello,

Thank you for your post, however please consider moving it to the right community place (e.g. MQX Software Solutions ) to get it visible for active members.

For details please see general advice Where to post a Discussion?

Thank you for using Freescale Community.

Re: Incompatibility IP Address and default IP Gateway Adress on TCP/IP Stack

RadekS — Mon, 14 Apr 2014 14:44:33 GMT

It looks like some problem in LAN configuration.

If you want establish connection inside your LAN network (range 10.4.32.1 - 10.4.47.254), gateway should not have any influence.

If you want establish connection outside of your LAN network, you have to be sure that gateway address is equal to address of your router (connection to external world).

Re: Incompatibility IP Address and default IP Gateway Adress on TCP/IP Stack

Luis_Garabo — Tue, 15 Apr 2014 19:32:12 GMT

Hi Angel,

The answer from RadekS is right.

You cannot use a gateway address on another subnet. The gateway IP tells the system how to get to another subnet, and without it, packets won't leave the current subnet.

A computer only knows how to talk to the other computers that are directly connected on the same subnet. A gateway is a "default route" which specifies where packets should be sent by default if they are not destined for somewhere on the local subnet.

Regards,
Garabo

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