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What are the reasons this has been so difficult? It seems like this must have been desirable for decades. Is the config of internal and external just tricky? Do
by gbhn 9y ago
What are the reasons this has been so difficult? It seems like this must have been desirable for decades. Is the config of internal and external just tricky? Does some legitimate traffic use this so it's difficult to get everyone to switch to alternatives?
- kkirsche 9y agoThe article lists multiple related to how routing works. While great in concept it is nearly impossible in non residential spaces
- dyu 9y agoThere are some incentive misalignments. Each AS that configures it is doing it to protect its neighbors, and does not benefit from itself having configured this way. Best practice suggestions only go so far. Another aspect is, if you configure it not just with your own prefixes but also that of your peers and downstreams (and their downstreams etc), then you need a source of ground truth. (Remember that not all ASes need to announce everything they have, all the time.) This is usually an out of band database. Then you have the problem of database needing to verify the truth, and keeping all the data fresh, etc.