The answer is an emphatic . Unlike application-layer frameworks that change every six months, routing protocols are the grammar of networking. BGP-4, the core of Volume II, hasn't changed significantly because it cannot change without breaking the internet.
Jeff Doyle and Jennifer DeHaven Carroll did not write a book to help you pass a test; they wrote a reference to help you keep the world connected. Routing TCP IP- Volume II -CCIE Professional Development
The series does not teach you to pass a multiple-choice test. It teaches you to troubleshoot a broken BGP route reflector cluster at 2:00 AM using a packet capture. This book focuses on the why behind the configuration. Part I: The Art of Interdomain Routing (BGP-4) The first half of Volume II is arguably the most important textual resource ever written for Border Gateway Protocol . The Transition from IGPs to EGPs Doyle masterfully explains the paradigm shift. In Volume I (OSPF/EIGRP), you trust everyone. In Volume II (BGP), you trust no one. The book breaks down Autonomous Systems (ASs) and why the internet is a federation of warring tribes rather than a single country. BGP Path Selection: The Decision Tree Most engineers know BGP has a list of attributes. Few know the exact order of operations. The answer is an emphatic
The book includes debug ip bgp outputs that look like ancient Greek. Study them. The CCIE lab does not have a GUI; you must read debug output to see why a route was rejected (AS loop, Next-hop inaccessible, Policy rejection). Jeff Doyle and Jennifer DeHaven Carroll did not
For over two decades, one book has sat on the desks of distinguished engineers, network architects, and CCIE candidates who refuse to treat the Internet's backbone as a black box: by Jeff Doyle and Jennifer DeHaven Carroll.