The fundamental Configuration Management Database (CMDB) requirement for an Internet Service Provider (ISP) is IP address management. One tool that provides this is TeemIP which is listed in this guide here. Commercial alternatives exist which includes those available from Infoblox. These database are used to record the IP addresses allocated to customers as well as internal network links. Without a workable IP address that is propagated upstream to peering exchanges a client will not have connectivity.
Read the article over at LinkedIn here.
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