Provider Independent Address Space (PI-addresses) are Internet Protocol addresses assigned by Regional Internet Registries directly to an end-user organization, without going through an Internet Service Provider.^[1]

It offers the end-user the opportunity to change service providers without changing addresses, and in particular to use multiple service providers at once in a multi-homed configuration, but creates problems for address aggregation as described in Classless Inter-Domain Routing (CIDR).

References

See also

• Multihoming
• Provider Aggregatable Address Space

Links

Sample BGP configuration for multihomed network

de:Provider Independent Address Space

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