> Short explanation:
>  When ppp interface is ready, each protocol installs a routing entry,
>  in your case for specific host (217.21.51.32).
>  In case (a):
>   request for duplicate an existing entry (entry "host 217.21.51.32"),
>   and the code returns EEXIST, and "couldn't set interface address".
>  In case (b):
>   there is no dublicate entry (entry "net 217.21.51.32", and entry "net 217.21.51.32/32").

Does this mean that under NetBSD it is always better to specify _static_
routing rules using '-net IPv4/32' instead of '-host IPv4'?
Is ppp the only protocol that behaves like this?
Is this really necessary to work this way (linux and NT has no problem
with my original config)
or it is a "good-old feature"? ;)
Is this common *BSD or NetBSD only feature?

-- 
Best regards, Aleksey Cheusov.