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Re: [lwip-users] ping my own device's ip always timeout

From: Sylvain Rochet
Subject: Re: [lwip-users] ping my own device's ip always timeout
Date: Thu, 13 Apr 2017 11:19:30 +0200
User-agent: Mutt/1.5.23 (2014-03-12)


On Thu, Apr 13, 2017 at 04:40:53PM +0800, Axel Lin wrote:
> Hi,
> After my device join an AP and get the ip (e.g.
> My device can ping the gateway ip and other devices in the same network.
> Other devices can ping my test device running lwip.
> But if I try to ping my own ip (, it always timeout.
> This seems strange.  is this a normal behavior in lwip?

Short answer:

 * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
 * address equal to the netif IP address, looping them back up the stack.
#define LWIP_NETIF_LOOPBACK             1


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