Learn ISIS for IPv4 and IPv6

from Basic to Advance level.

Course Description – IS-IS Routing Protocol (Beginner to Advanced)

In recent years, the IS-IS (Intermediate System to Intermediate System) routing protocol has gained significant popularity, especially within large Service Provider networks. While many engineers are already familiar with OSPF, EIGRP, and RIP, IS-IS offers unique advantages in scalability, stability, and operational simplicity, making it a preferred choice for carrier-grade environments.

IS-IS is widely deployed inside Service Provider backbones and is commonly used as the IGP in MPLS, IPv4, and IPv6 networks. Unlike OSPF, IS-IS was originally designed for CLNS but has evolved to support modern IP networks with exceptional robustness. As a result, mastering IS-IS has become an essential skill for engineers working in Service Provider, Data Center, and Multi-Vendor environments.

This course is ideal for anyone who wants to learn IS-IS from the ground up. It covers core concepts, packet structure, adjacency formation, LSP flooding, SPF calculation, multi-level design, authentication, and advanced deployment scenarios. All lessons are explained in a clear and practical manner with real lab configurations.

IS-IS for IPv4 and IPv6 is already part of Cisco’s CCNA, CCNP Service Provider, and CCIE Service Provider blueprints, and has also been added to the new CCIE Routing and Switching v5 curriculum. This makes IS-IS not only valuable for real-world operations but also essential for engineers preparing for professional and expert-level Cisco exams.

By the end of this course, you will have a strong understanding of IS-IS concepts, configuration, and troubleshooting techniques that apply directly to production networks and certification preparation.