RE: route filtering in large networks

["Michael K. Smith" <mksmith () noanet net>]

> >
> You think that's bad? Try this one. Contacted network to 
> inform them that they had an access list on a router 
> rejecting 69/8 and that 69/8 was recently handed out, blah 
> blah blah. Get a call back saying that they found the route 
> for 69 and removed it. Could I please try it again. To humor 
> said person, I tried it again and got what I expected (A). My 
> question is, if he's running an acl with a bogon list, why 
> does he have a route (presumably static since it was removed) 
> for 69/8? I'm tempted to start mailing out bananas.

Check out http://www.cymru.com/Documents/secure-ios-template.html

All of the various Bogons, including unassigned ranges, are represented with
a route to null0.

Mike