ESP8266 Developer Zone

I am trying to configure ESP8266 with static IP but somehow the IP gateway is changing automatically to some invalid value.
IP configuration I want to set:
IP: 192.168.1.100
Mask: 255.255.255.0
GW: 192.168.1.254

But when I print the ip configuration I get back this:

IP: 192.168.1.100
Mask: 255.255.255.0
GW: 255.255.255.127

Can someone tell me or point me where things are going wrong? Is it that GW IP 192.168.1.254 is not allowed??

Hi
About this,I don't you how to set,but you can consult this sample to set.
https://github.com/espressif/esp8266-rt ... /conn_ap.c