Plan Summary

Following the previous strategy, it should be quite straightforward to consistently number a new ISP backbone. Figure 5-15 shows how this strategy could apply to the scenario described. The ISP can justify a /23 for the infrastructure including loopbacks, so the address distribution looks something like that in Figure 5-15. All three registries make a minimum allocation of a /20 at the time of this writing, so this example assumes that the ISP would receive a /20 with the previously documented plan.

Figure 5-15. Address-Deployment Plan

Figure 5-15. Address-Deployment Plan

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