PBR overrides the normal routing table behavior, potentially leading to microloops during reconvergence because forwarding decisions are based on policies rather than updated routing tables.
During fast topology changes, PBR decisions may not adapt as quickly as dynamic routing protocols, causing brief routing inconsistencies.
Why other options are incorrect:
A: PBR can add complexity but does not inherently limit scalability.
C/D: PBR does not directly affect convergence speed but can introduce inconsistency.
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