BGP route filtering – Access lists vs Prefix lists
When filtering routes with BGP it’s very likely that you’ve used prefix lists. Once again, this is just something that we’ve been taught to do and consider good practice. On… Read more »
BGP Synchronization
BGP synchronization is something that can easily be misunderstood. This is particularly the case since it is now disabled by default on Cisco devices. Let’s start with a basic configuration… Read more »
BGP update groups
BGP peer groups are a really great tool that I don’t use often enough. Basically, a BGP peer group stores a set of configuration parameters that can be applied to… Read more »
BGP Networks and masks
As we’ve seen, BGP is very different from the IGPs that are traditionally used for next hop forwarding. One of the most significant differences between BGP and other routing protocols… Read more »
BGP confederations
Another option for not requiring a full iBGP mesh between routers is to break the routers into sub-autonomous systems. This is referred to as confederating the autonomous systems. Let’s jump… Read more »
BGP Route Reflectors
One of the main points to remember about iBGP relationships is that iBGP assumes that all of the routers within a single AS are fully meshed. That is, each router… Read more »