(macaddr? object)
This predicate returns #t if the object is a MAC (Ethernet) address, otherwise #f.
#t or #f
> macaddr?
#<primitive-procedure macaddr?>
> (macaddr? 11:22:33:44:55:66)
#t
> (macaddr? '11:22:33:44:55:66)
#t
> (macaddr? '11:22:33:44:55:XX)
#f
>