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Hubs & Spokes Problem Description: Access network problem, customer initiated, one exit path Applicability: ISPs with Dual Stack core and a number of dual stack Points of Presence (“Hubs”) where they connect their customers. 3 usage cases have been identified: the networks between the CPE router and the hub supports only one address family. the CPE router cannot be easily upgraded to support both address families, a softwire is created from a node behind the CPE router Same, but initiated from another router behind the CPE router |