GNS3 tacacsGUI Assign Static IP

In my GNS3 lab for my TACACS Netmiko project I had an issue with my tacGUI boxes not retaining their DHCP addresses and not accepting a static IP address.

https://www.gns3.com/community/featured/tacacs-appliance-with-gui

The underlying OS on these VMs is Apline Linux 3.7.

tacacs:~# cat /etc/*release*
3.7.0
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.7.0
PRETTY_NAME="Alpine Linux v3.7"
HOME_URL="http://alpinelinux.org"
BUG_REPORT_URL="http://bugs.alpinelinux.org"

The documentation states that there are two methods for configuring the static IP based on the version. Version 3.13 requires slash notation on the end of the IP address to represent the subnet mask.
https://wiki.alpinelinux.org/wiki/Configure_Networking#IPv4_Static_Address_Configuration

/etc/network/interfaces

auto eth0
iface eth0 inet static
        address 192.168.122.97/24
        gateway 192.168.122.1
        hostname oldtacacs

As the GNS3 appliance is only 3.7 the subnet mask needs its own line.

/etc/network/interfaces

auto eth0
iface eth0 inet static
        address 192.168.122.97
        netmask 255.255.255.0
        gateway 192.168.122.1
        hostname oldtacacs

Full Commands

tacacs:~# sudo vi /etc/network/interfaces

auto lo
iface lo inet loopback

#auto eth0
#iface eth0 inet dhcp
#       hostname tacacs

auto eth0
iface eth0 inet static
        address 192.168.122.97
        netmask 255.255.255.0
        gateway 192.168.122.1
        hostname oldtacacs


tacacs:~# /etc/init.d/networking restart

Another thing that can be done is to temporarily change the IP. This works until reboot

sudo ifconfig eth0 192.168.122.97 netmask 255.255.255.0

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