Fixing the Framework's Wifi on CachyOS and Orbi

I spent several hours yesterday trying to get Wifi to remain up on the Framework after installing CachyOS. It was not easy. I had to drag Claude Code in to help. I'd have never been able to find and fix it, otherwise. Flaky Wifi is a commonly-reported problem with the Framework 13. In my case it was related to the Orbi mesh, so I don't know if this helps anyone else, but I'll leave it here, just in case. It's working for me. TL;DR is pin wifi to a 5 GHz BSSID so the 6 GHz band doesn't get in the way. Here's a slightly edited version of Claude Code's summary: The fault. The Framework connects, gets a DHCP lease, and stops passing traffic about two minutes later. The link never drops — =iw= says =Connected= throughout, the AP keeps acking frames, signal is fine. What dies is ARP: ping starts returning Destination Host Unreachable from the machine's own address, which is the kernel giving up after its ARP entry expires at ~60s and cannot be refreshed. The "two minutes" is the ARP cache…