Gordon Messmer wrote:
As a point of clarification: The setup that you're describing isn't multiple WiFi routers, it's multiple WiFi Access Points.
Thanks for your response, and for all the others. I am indeed using the two routers as Access Points, turning off dhcp on them, etc.
I did actually try what has been suggested, but it didn't seem to work, which made me wonder if it was possible in principle.
However, I almost certainly made some mistake setting up the second router/AP, which is actually an ancient Netopia router from my ISP, whose manual says it can be used as an AP. I see it with "arp -a" on my server, but I've now noticed I don't see it on my Android phone, or with "iwlist scan" on my laptop.
Apologies, I don't think this router/AP is working ...