[Sidrops] draft-sidrops-rpkimaxlen

Matthias Waehlisch <m.waehlisch@fu-berlin.de> Thu, 21 February 2019 10:31 UTC

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Date: Thu, 21 Feb 2019 11:31:25 +0100
From: Matthias Waehlisch <m.waehlisch@fu-berlin.de>
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Subject: [Sidrops] draft-sidrops-rpkimaxlen
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  I read the (expired) draft draft-sidrops-rpkimaxlen.

  The problem analysis in the draft is misleading.

  The problem is not the usage of the max length field. Even without a 
max length field, a "forged-origin subprefix hijack" may occur easily. 
For example, a minimal, more specific ROA has been created, and the 
prefix is currently not announced by the origin AS configured in the 

  The draft implicitly suggests: "Only create ROAs for prefixes that are 
currently announced." I'm not sure whether the WG has consensus about 

  The draft is expired. I suggest to leave it expired because it leads 
to incorrect conclusions, see for example 


Matthias Waehlisch
.  Freie Universitaet Berlin, Computer Science
.. http://www.cs.fu-berlin.de/~waehl