PROVIDER INDEPENDENT VS PROVIDER ASSIGNED IP ADDRESS SPACE

Network administrators are faced with a great challenge while selecting the Public IP address space to be used on newly provisioned Internet link. The IP address space has to be one of the following – (1) Provider Assigned or (2) Provider Independent.

Just to set the platform, PI (Provider Assigned) addresses are individually assigned, do not have a specific provider relation and are always routed independently on the global Internet by themselves as a separate block.

PA (Provider Assigned) address assignments made by a Provider and come from a large block allocated to a Provider by RIPE.

While designing, an experienced mind can be life saver because the IP address space selection will depend on many factors like –

  • Internet failover scenarios (Multihoming)
  • Web facing and Internet browsing application requirements
  • Internet Link Failover approach.

Below differences between Provider assigned IP Block and Provider Independent IP block will help give insight how both differ –

provider-independent-vs-provider-assigned-ip-address-space

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