Fred MAISON wrote:

When proxing some eap-type by real to an external radius, is it possible to configure a normal and a backup proxy server ?

Yes. That's why there are home_server_pools. You can configure them as "failover". See the comments in raddb/proxy.conf.

I saw (in proxy.conf comments) it was possible when proxying to a local virtual server, but I don't understand what to do for normal/backup externals radius we have to proxy to for a particular real.

I'm not sure what's unclear about proxy.conf. Right near the top, it says: # Load-balancing and failover between home servers is handled via # a "home_server_pool" section. Alan DeKok.