For a properly dimensioned and configured operator, its network resiliency strategy (like overprovisioned capacity on transit and diversified peering strategy) should absorb demand in case of IX failure .
However, it can become a source of operational risk in scenarios where high frequency outages occur. In such cases, the issue is not the LAN’s role per se, but rather the side effects on route convergence and traffic re-convergence—especially in large-scale environments.
Maintaining LAN stability and consistency remains essential not because the LAN is a single point of failure, but because of its impact on the broader routing ecosystem when things go wrong.
