To improve the stability of a global network, you have been tasked with changing the design to include link-state topology summarization. What are two issues that you should address as part of the des

Summarization reduces SPF computation scope and LSA propagation across area boundaries, which generally improves convergence speed rather than slowing it.

Summarization hides specific prefix-level topology, so routers select paths based on the summary rather than the best path to the exact destination, which can result in traffic taking a longer or less efficient route - suboptimal routing.

When a summarizing router advertises a summary block but individual subnets within that block are unreachable locally, traffic destined for those subnets is attracted to the summarizing router and silently dropped, causing a black hole.

Packet reordering is caused by per-packet load balancing or asymmetric path changes and is not a design concern introduced by topology summarization.