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IS-IS Network Design Solutions by Scott Sturgess, Abe Martey

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Comments on IPv6

Depletion of the IPv4 address space has been steep with the tremendous growth of the Internet. Efficient and innovative schemes for controlling address usage, such as CIDR, Network Address Translation (NAT), and Dynamic Host Configuration Protocol (DHCP), have helped contain the problem. A limitation of IPv4 is challenges with renumbering, especially in cases where a medium-size network changes service providers. IPv4 addresses are assigned to service providers and portability is an issue. The inability of many sites to renumber as they migrate their networks to new service providers has led to severe fragmentation of the IPv4 address space, exacerbating the already high growth rate of the global Internet routing table. The growth ...

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