I am trying to make my Pi accessible via SSH regardless of which wireless network it is connected to. For this end I have setup a static IP address to the `wlan0` interface. Problem is that I cannot SSH to the Pi, ping it from other devices or ping anything in the network from the Pi. However, I can browse internet and ping addresses such as www.stackexchange.com from the Pi. 

The problem goes away if I shutdown the `eth0` interface with `sudo ifconfig eth0 down`. Then everything works perfectly. However, `eth0` is back and running after a reboot. How can I direct all traffic to prefer the `wlan0` interface instead of (not connected) ethernet?

I have the model 3b and am running Raspbian Jessie. My network/interfaces file


    auto lo
    iface lo inet loopback
    
    auto eth0
    allow-hotplug eth0
    iface eth0 inet manual
    
    auto wlan0
    allow-hotplug wlan0
    iface wlan0 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

At the end of my dhcpcd.conf I have 

    interface wlan0
    static ip_address=192.168.0.240/24
    static routers=192.168.0.1
    static domain_name_servers=192.168.0.1
and `192.168.0.240` is the address I try to ping/connect to.

When I ping other devices from the Pi while `eth0` is active, I can see the Pi tries to ping from the address of the ethernet, although there is no ethernet cable attached and I want wifi to be used. This is how I figured to disable it and it seems to be the cause of the problem. Moreover, upon booting I get the message.

> Waiting for network for 110 additional seconds

In a nutshell: Pi seems to use wrong network interface, how to fix?

Edit: `ifconfig` output

    eth0      Link encap:Ethernet  HWaddr b8:27:eb:df:e2:1a
              inet addr:192.168.43.24  Bcast:192.168.43.255  Mask:255.255.255.0
              inet6 addr: fe80::8ed2:5c2a:b54f:d28c/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:420 errors:0 dropped:0 overruns:0 frame:0
              TX packets:121 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:37528 (36.6 KiB)  TX bytes:19320 (18.8 KiB)
    
    lo        Link encap:Local Loopback
              inet addr:127.0.0.1  Mask:255.0.0.0
              inet6 addr: ::1/128 Scope:Host
              UP LOOPBACK RUNNING  MTU:65536  Metric:1
              RX packets:88 errors:0 dropped:0 overruns:0 frame:0
              TX packets:88 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1
              RX bytes:7689 (7.5 KiB)  TX bytes:7689 (7.5 KiB)
    
    wlan0     Link encap:Ethernet  HWaddr b8:27:eb:8a:b7:4f
              inet addr:192.168.43.224  Bcast:192.168.43.255  Mask:255.255.255.0
              inet6 addr: fe80::fc57:9494:65ae:1475/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:2547 errors:0 dropped:946 overruns:0 frame:0
              TX packets:146 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000
              RX bytes:316994 (309.5 KiB)  TX bytes:17769 (17.3 KiB)