Configure networking manually on SPS and SSB to get SSH access (4283012)

When the core firmware cannot be started no networking is configured, so no SSH access is available.

To make troubleshooting easier manual configuration of networking is needed.

This guide will use the following network configuration.
     IP address/netmask:  192.168.1.100/255.255.255.0
     Default gateway:  192.168.1.1

• Assign the IP address manually to the "External interface".
  

ifconfig eth0 192.168.1.100 netmask 255.255.255.0

• Add the default gateway.

route add default gw 192.168.1.1 eth0

• Restart ssh service.

systemctl restart ssh