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RPKI ASPA: using AS-PATH to secure BGP

RPKI ASPA: using AS-PATH to secure BGP

RPKI ASPA: a complement to RPKI/ROA that tackles BGP route hijacks through AS path manipulation.

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Posted by Jerome Tissieres March 26, 2026
Image from https://www.cidr-report.org/

BGP full-routes vs partial-routes vs default-route

The IPv4 full BGP table size is around 725000 prefixes now. This may cause problems for companies that do not have the resources to update or upgrade their edge routers.

But, except for Internet transit providers, who really need to get the full IPv4 BGP table today? And what are the alternatives?

Let’s see that in detail with some use cases.

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Posted by Jerome Tissieres July 18, 2018
BGP load sharing and unequal cost load sharing

BGP load sharing and unequal cost load sharing

On Cisco routers, by default the BGP protocol will not do load-sharing – and even less unequal cost load-sharing – across multiple links, for traffic to the same eBGP destination with different AS-path. Let’s see how we can change this.

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Posted by Jerome Tissieres March 2, 2018
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