Hi Peter,

> interface eth0
> static ip_address=192.168.1.9/27
> static routers=192.168.1.1
> static domain_name_servers=192.168.1.1 8.8.8.8
>
> interface wlan0
> static address=192.168.1.8/27
> static routers=192.168.1.1
> static domain_name_servers=192.168.1.1
...
> pi@raspberrypi:~ $ ifconfig
> eth0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
>          ether b8:27:eb:b2:f7:c8  txqueuelen 1000  (Ethernet)
...
> wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>          inet 192.168.1.21  netmask 255.255.255.224  broadcast 192.168.1.31
>          inet6 fe80::2c9:aeca:54e4:fa59  prefixlen 64  scopeid 0x20<link>
>          ether 00:0c:43:00:cc:2d  txqueuelen 1000  (Ethernet)
...
> So it is not setting my static .8

It's not setting your eth0's .9 either.

Does your router know your LAN is 192.168.1.0/27, and not /24?  Why did
you choose that?  Do you have networks and hosts that would fall inside
192.168.1.0/24 but are outside 192.168.1.0/27, e.g. host
192.168.1.33/27?

Unless Raspbian has deviated from Debian Stretch in this area, you may
do better looking at Debian's documentation and Debian users solving the
problem.  Also, dhcpd and other programs often log their decisions, and
have a `debug' method to increase that logging.  Turning that on may
explain more.

Cheers, Ralph.

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