Tag: BGP

One of my favorite things about BGP is how flexible it is.  The other thing I love is that it’s really easy to see all of the possible paths the… Read more »

An important part of understanding BGP is understanding how it sends it’s routing updates.  Take for example this basic topology… There are 7 routers total and 4 autonomous systems.  We’ll… Read more »

I hope you are starting to get the point, but there are a ton of different maps that can be configured with BGP.  The next one I want to cover… Read more »

When advertising aggregates in BGP, it’s possible to specify the ‘as-set’ command as part of the aggregate.  This forces the BGP process to advertise the prefix with a list of… Read more »

Boiled down inject maps look for a particular prefix, from a particular source, and if detected, advertise other prefixes.  This is mostly used along with BGP aggregation to ‘un-aggregate’ certain… Read more »

Unsuppress maps fit a very specific need in BGP.  When writing this post, I was really only able to think of one or two examples of where you might need… Read more »