CCIE SP - IS-IS - Initial + Full Configs

Intermediate System to Intermediate System (IS-IS) is a link-state interior gateway protocol (IGP) widely used in service provider and large enterprise networks due to its scalability, fast convergence, and protocol flexibility.

Unlike OSPF, IS-IS runs directly over Layer 2 (without IP encapsulation), making it highly efficient for large-scale routing. It supports multi-level hierarchy (Levels 1 & 2), ECMP (Equal-Cost Multipath Routing), and seamless integration with MPLS and segment routing.

This lab provides hands-on experience configuring IS-IS adjacency formation, area design, metric tuning, route propagation, and authentication, ensuring you're fully equipped to implement and troubleshoot IS-IS in CCIE SP environments.

You might also be interested in these labs:

• CCIE SP - IS-IS - Initial + Full Configs
• CCIE SP - BGP Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN - All Inter-AS Options - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN - Carrier Supporting Carrier Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option D Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option C Lab - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option B Lab - Initial + Full Configs
• CCIE SP MPLS Lab 2 - Initial + Full Configs
• CCIE SP - Inter-AS MPLS VPN Option A Lab - Initial + Full Configs
• CCIE SP - H-VPLS - Initial + Full Configs
• CCIE SP - VXLAN - MPLS - EVPN - Initial + Full Configs

The default username and password for images used in this course is as follows, however you will hear new passwords during the course if the instructor changes the credentials: 

** For Cisco XRv you are asked for a username and password in the loading process. You can add any username and password other than admin, root, sysadmin and other reserved usernames. Go with something like Alex/cisco e.g.

Then when completely loaded, you can use cisco/cisco or admin/admin.

***For XRv9K Full image you are asked for a username and password in the loading process. You then login using the username and password that you set.