When setting a static ip address the dhclient does not assign the fixed address in /etc/network/interfaces but set a dynamic one. Furthermore after enabling the port both Ethernet interfaces hang for a few seconds (then recover).
need Kontron Mitx-e38 /wrlinux-8/wrlinux/configure --enable-jobs=64 --enable-reconfig --enable-board=intel-x86-64 --enable-rootfs=glibc-core --enable-kernel=standard --enable-build=debug --enable-bootimage=ext3 --with-init=sysvinit • Configure /etc/network/interfaces to use a static IPv4 address for eth0 • Run ifup eth0 • (eth0 now has a single IPv4 address – the static IPv4 address) • Run ifdown eth0 • Modify /etc/network/interfaces to request only a DHCP address and no static address(es) • Run ifup eth0