How is BGP configuration managed

Question

I assume most of the core BGP routers are all Cisco and run Cisco IOS. Are there tools equivalent to Terraform that allow network engineers to apply router configuration programmatically, with an audit trail, and rollback support?

QuarterRoy · Accepted Answer

Yes, there are many ways to do so. Most commonly you can use configuration management products, restconf/netconf, and more. Cisco routers (and many other brands) do not commit the configuration as a startup configuration until you issue a second command that commits the running config (running in memory) to the startup config. This allows the router/device to revert back if rebooted.One point of clarification is that I don't know if Facebook uses Cisco routers for BGP. Facebook is well known for rolling its own routing stack and other services on its own servers.