Wondering if this switch is capable of being a backbone switch for a network of about 1000+ users and if the switch can handle a sustained 30Meg of data going across it?

Having issues routing on faste2/0I made up IPs and put them in...mostly non-routable. If we put an IP address on the faste2/0 INT it will not work at all. However if we put the same IP on faste1/1 as a secondary all works fine. We are wondering why i...