Comparison of Route Maps using Permit vs Deny

Below are two route maps that perform the same function to deny rfc1918 routes and allow all other prefixes.  In the example for the "good" neighbor, the route-map statement is a permit with an enclosed match condition using a deny prefix-list entries for the rfc1918 addresses.  In the example for "cheap" the scenario is reversed.  Examine the example and see if you can understand how they are both doing the samething.

BGP Class Lab Diagram and Configs

One of my favorite internet visualizations

This is a visual representation of Internet Service Providers it locate the longitude of their peering points but also identifies the number of peering relationships each peer has the closer to the center the more peering.

A pdf and a larger version are here

MPLS Static Routes vs Dynamic

When using MPLS VPN to a service provider I'm not a huge fan of service provider managed static routing.  I would prefer to inject whatever routes I want to the MPLS cloud.  For this of course you will need to have a CE router advertise BGP to the service provider.  A fully dynamic model would assume you redistribute your entire IGP routing table into BGP and therefore MPLS.   Below is an example of providing individual host routing across the MPLS VPN.  Only the static routes tagged with 100 are advertised into BGP