Abstract: Aspects of the subject disclosure may include, for example, an apparatus, comprising: a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising: automatically determining for a plurality of downstream network nodes one or more subnet identifiers, one or more network identifiers, or a combination thereof; automatically summarizing the one or more subnet identifiers, the one or more network identifiers, or the combination thereof to produce a summary; automatically determining whether the summary requires updating, resulting in a determination; and responsive to the determination being that the summary requires updating, automatically updating the summary to produce an updated summary, wherein the updated summary: deletes one or more subnets that were in the summary; adds one or more subnets that were not in the summary; deletes one or more networks that were in the sum

Abstract: Aspects of the subject disclosure may include, for example, an apparatus, comprising: a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising: automatically determining for a plurality of downstream network nodes one or more subnet identifiers, one or more network identifiers, or a combination thereof; automatically summarizing the one or more subnet identifiers, the one or more network identifiers, or the combination thereof to produce a summary; automatically determining whether the summary requires updating, resulting in a determination; and responsive to the determination being that the summary requires updating, automatically updating the summary to produce an updated summary, wherein the updated summary: deletes one or more subnets that were in the summary; adds one or more subnets that were not in the summary; deletes one or more networks that were in the sum

Abstract: A Border Gateway Protocol (BGP) router is configured to obtain a plurality of prefix-lists one or more of (i) in local Outbound Route Filtering (ORF) and (ii) in ORF from upstream BGP routers, automatically apply logical set operations on the plurality of prefix-lists to determine an aggregated ORF for a downstream BGP router, and propagate the aggregated ORF to the downstream BGP router which uses the aggregated ORF for BGP advertisements. This can include auto generation of sequence numbers for the plurality of prefix-lists in the aggregated ORF, such that the downstream BGP router uses the sequence numbers for precedence in the advertisements. The prefix-lists can include one or more PERMIT lists, DENY lists, and a combination of PERMIT and DENY lists, with the logical set operations including union with the PERMIT lists, intersection with the DENY lists, and a combination of union, intersection, and set differences with the combination of PERMIT and DENY lists.

Abstract: A Border Gateway Protocol (BGP) router is configured to obtain a plurality of prefix-lists one or more of (i) in local Outbound Route Filtering (ORF) and (ii) in ORF from upstream BGP routers, automatically apply logical set operations on the plurality of prefix-lists to determine an aggregated ORF for a downstream BGP router, and propagate the aggregated ORF to the downstream BGP router which uses the aggregated ORF for BGP advertisements. This can include auto generation of sequence numbers for the plurality of prefix-lists in the aggregated ORF, such that the downstream BGP router uses the sequence numbers for precedence in the advertisements. The prefix-lists can include one or more PERMIT lists, DENY lists, and a combination of PERMIT and DENY lists, with the logical set operations including union with the PERMIT lists, intersection with the DENY lists, and a combination of union, intersection, and set differences with the combination of PERMIT and DENY lists.