In this paper we describe how Network Address Translators (NATs) can be used to address the deficiencies previously discussed, while at the same time facilitate scalable routing for multi-homed multi-provider connectivity. The scheme described in this paper (a) does not require enterprise host renumbering when changing ISPs, and (b) allows load distribution that does not depend on the address assignment scheme inside an enterprise. To provide connectivity failover, the scheme described in this paper uses the mechanisms similar to the ones described in [RFC2260]. The scheme described in this paper is equally applicable to both IPv4 and IPv6.
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