[c-nsp] Full BGP Routing tables

[Cisco Boy]

Hi,
What is the benifit of having full routing table (internet BGP) on the 
Router B?

====SouthernCrossCable-----7206(rtr-A)---giga-------7301(rtr-B)------BWA/DSL 
customers
-----------------datacenter--------------------               
---------------ISP----------------------

The datacenter router is running a full BGP route table.