Any tips on getting this working.
Configured a pretty much standard vpc across two switches and it goes up and down like a yoyo and eventually seems to crash the f5 after 24hours.
Can not configure lacp i guess but seems a bit weird it dosen't work with nexus switches which are common as mud these days.
Any tips or config items that might be required?
You should get a better diagnostic (with command outputs). You can follow some of this guides to get more details.
REF - https://support.f5.com/csp/article/K35281771
REF - https://support.f5.com/csp/article/K62013114
REF - https://support.f5.com/csp/article/K83253027