CCIE-The Journey begins

BGP network advertisement assumes classful if mask is not specified.

When peering to an interface other than the physical one (a loopback for example) remember to update the bgp...Continued...

External Type 1 - the cost of these routes reflect the entire path, not just the path between the ASBR and the destination network.
External Type 2 - the cost of these routes...Continued...