Dell PowerConnect 8100 User's Configuration Guide - Page 1091

• ipv6 route 2001::/16 null 254 ipv6 route 2002::/16 null 254 These address ranges are reserved and not reachable in the Internet. If for some reason you have local networks in this range, a more specific route will have precedence. Another use for the Reject route is to prevent internal hosts from communication with specific addresses or ranges of addresses. The effect is the same as an outgoing access-list with a "deny" statement. A route is generally more efficient than an access-list that performs the same function. If you need more fine-grained filtering, such as protocols or port numbers, use the access-list instead. Configuring IPv6 Routing 1091