[c-nsp] v6 address in ext acc list?

[Randy Bush]

trying to add an ipv6 block to the access list i use to filter
what goes in bgp.

   foo(config)#access-list 187 permit ip host 2001:418:1::/48 any
                                              ^
  % Invalid input detected at '^' marker.

on c7200-k91p-mz.122-25.S5

randy