nested prefixes in Internet

Florian Weimer fw at deneb.enyo.de
Wed Oct 5 20:50:25 UTC 2016


* Martin T.:

> Florian:
>
>> Are the autonomous systems for the /19 and /24 connected directly?
>
> Yes they are.

Then deaggregation really isn't necessary at all.

>> (1) can be better from B's perspective because it prevents certain
>> routing table optimizations (due to the lack of the covering prefix)
>
> What kind of routing table optimizations are possible if covering /19
> prefix is also present in global routing table?

The /24 prefix could arguably be dropped and ignored for routing
decisions.


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