Click the Exhibit button. You enabled a new router (R3) in your network but all destinations using IS-IS routes are not properly load balancing over this new router. Referring to the exhibit, what is the problem?
The IS-IS database outputs reveal a mismatch in metric types:
R3 advertises prefixes with narrow metrics (metric 63, the maximum value for 6-bit narrow metrics).
R2 uses wide metrics (metric 1000, which requires 24-bit wide metrics).
Why This Causes Load Balancing Failure:
IS-IS cannot compare or load balance between routes with narrow and wide metrics.
R1 likely has wide metrics enabled (as it processes R2’s 1000 metric), but R3’s narrow metrics (63) are incompatible. This prevents R1 from considering R3’s paths as valid alternatives for load balancing.
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