.11 is the pogo and .70 is my laptop so looks like the settings are correct.
Good idea on the pings. I will test it again to make sure (although I'm pretty sure that it doesn't reply to ping until Arch has finished booting since when I was trying to spot packets using Wireshark I was running ping during the boot).
Presumably I should also see an ARP broadcast from the Pogo so will look for that on Wireshark too.
Thanks again all for trying to help!