I've recently acquired some Logitech Network security cameras

I want to use them with Motion on Ubuntu 10.04

Anyway, I'm just having trouble working out how to access the cameras. I've just plugged one in so far and here's what is happening:

it shows up in lsusb
Bus 002 Device 003: ID 09e1:5121 Intellon Corp. MicroLink dLAN

here is what happens in dmesg
[42733.391780] hub 1-4.1:1.0: connect-debounce failed, port 2 disabled
[42745.490100] hub 2-0:1.0: unable to enumerate USB device on port 1
[42745.830057] usb 2-1: new full speed USB device using ohci_hcd and address 3
[42746.068797] usb 2-1: configuration #1 chosen from 1 choice
[42746.071793] usb 2-1: bad CDC descriptors
[42746.083277] eth2: register 'int51x1' at usb-0000:00:04.0-1, Intellon usb powerline adapter, 00:12:ab:05:d5:e4
[42746.116308] udev: renamed network interface eth2 to eth4
[42756.560023] eth4: no IPv6 routers present
eth4      Link encap:Ethernet  HWaddr 00:12:ab:05:d5:e4  
          inet6 addr: fe80::212:abff:fe05:d5e4/64 Scope:Link
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:4253 (4.2 KB)  TX bytes:2330 (2.3 KB)
How do I make use of this information? The camera/device has an IPv6 address, but I don't know how to view it or tell motion where it lives. Let alone if it's even working at all