H12-921-V1.0: HCIE-Data Center Network (Written) V1.0

IPv6 global-unicast prefixes assigned by an ISP are provider-dependent and typically delivered as part of the provider’s connectivity service, making them economical for small and midsize enterprises. Their dependence on the ISP can require renumbering when the provider changes, reducing scalability. Independently planned and controlled address space instead requires provider-independent address resources.