Booting the 5.1.1 live CD on a system built with this motherboard leaves eth1 (the ethernet interface) unusable
(eth0 is the firewire interface).
It looks like the pump daemon fails.

Workround
Wait for the startup to complete then enter the following commands
su
ifconfig eth1 up (as when pump fails it sets it to down)
ifconfig eth1 192.168.2.9 (or whatever the IP address of your system should be)
ifconfig mtu 1500 (as when pump fails it resets it to 64 !!!)
route add default gw 192.168.2.1 (or whatever the IP address of your router is)

The ethernet interface on this motherboard is a Marvell Yukon 88E8053 PCI-E Gigabit Ethernet Controller