Route Origin Authorization or ROA is a digital object that contains a list of address prefixes and 1's number and it is an authority created by a prefix holder to authorize an air snubber to originate one or more specific route advertisements and you publish Aurora using your registry member portal and consult your registry for how to use that member portal to publish the rowers each registry has their own system their own member portal and all process for doing so a typical rule would look something like a shown on the slide it will contain the prefix the max length and the origin is the prefix is the address block or delegated address space that needs to be signed the max length is the smallest subnet of that address prefix that is covered by the raw and the origin is lists the autonomous system that is originating this prefix do note that there can be more than one row per address block and this allows the network operator to originate prefixes from more than one AAS it caters for changes in routing policy or prefix origin and allows for multihoming and other features.

© Produced by Philip Smith and the Network Startup Resource Center, through the University of Oregon.

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