I added static route like this:
ip route xx.yy.zz.0 255.255.255.0 Null0 254
But "show ip route static" doesn't show it.
I use this static route to redistribute it into BGP.
Platform is Catalyst 6509 with SUP2.
Why doesn't this route appear in RIB?
Yes. Setting administrative distance as 255 will make the router to consider the prefix as invalid and will not install the same in routing table.