Após horas de debug descobri que não devemos usar interfaces virtuais (eth0:1) com túneis, rotas etc… Segundo a documentação do Debian: arp, ifconfig and route (…) while these tools work, they show some unexpected behaviour under Linux 2.2 and up Hoje em dia deverão ser utilizadas as ferramentas do pacote iproute2 para associar vários endereços de IP à mesma interface […]

The SheevaPlug is a very small embedded computer (actually one of the first such computers on the market), running a 1.2 GHz Marvell Kirkwood 6281 ARM-compatible CPU. It can run Linux distros based on Debian such as Ubuntu (up to version 9.04) and features basic network connectivity, USB, and an SD card slot.