easy way to upgrade from 6.3 to 7.1 (including port packages)

[Byung-Hee HWANG]

in my experience, in usual kernel && userland upgrading is good,
however, everytime port upgrading have problem, whenever new -REL is
released ;; i usually do port upgrading by portupgrade(1).

at once(when 6.2-REL was released) i did upgrading port by
portupgrade(1) but i met failures on the upgrading. then i did
`pkg_delete -af` and then i did installation all packages by pkg_add(1)
cause at that time the packages were twisted each other roughly ;;

so is there any easy way to upgrade packages ??
can you please help me about this matters?

byunghee
     
-- 
"And I ain't gonna change."
		-- Nino Valenti, "Chapter 13", page 184