This article aims to explain some of the basic terms related to BGP.
AS-Set or AS-Macro:
Record in the IRR (Internet Routing Registry) containing a Set of ASNs.
The AS-Set is used to generate Filters by IXPs and Upstream providers.
What should be in your AS-Set and whatnot:
This is a simple BIRD BGP Config with one Upstream and a single Prefix announcement. You can use and adapt this example for both v4 and v4.
You will need to replace the variables written in all caps with your ASNs, IPs etc..
Useful Bird commands:
For IPv6 on Bird 1.x use birdc6