CCDE: Cisco Certified Design Expert (Practical) — Question 27

Company XYZ is designing the IS-IS deployment strategy for their multiarea IS-IS domain. They want IS-IS neighbor relationships to be minimized on each network segment and want to optimize the size of the IS-IS LSDB on each router. Which can design can be used to meet these requirements?

Answer options

• A. Design all routers as Level 2 routers. Set the links between the routers as Level 1 with the area
• B. Design the network so that the routers connecting to other areas are Level 2 routers and internal routers are Level 1
• C. Design the network so that all routers are Level 1 routers
• D. Design the network so that the routers connecting to other areas are Level 1/Level 2 routers and internal routers are Level 1

Correct answer: D

Explanation

The correct answer is D because having routers that connect to other areas as Level 1/Level 2 allows for efficient routing and minimizes neighbor relationships while optimizing the LSDB size. Options A and C do not support the multiarea design effectively, and option B does not meet the requirement of minimizing neighbor relationships on all network segments.