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Re: [sidr] draft-sriram-bgpsec-design-choices-00 -- IXP and Route Server

Randy Bush <randy@psg.com> Fri, 08 July 2011 10:51 UTC

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Date: Fri, 08 Jul 2011 19:51:39 +0900
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From: Randy Bush <randy@psg.com>
To: Chris Hall <chris.hall@highwayman.com>
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Cc: sidr wg list <sidr@ietf.org>
Subject: Re: [sidr] draft-sriram-bgpsec-design-choices-00 -- IXP and Route Server
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i have a design that covers you.  it is based on an 'optimization' and
we have agreed to let optimizations sit for a bit.

the hack is as follows <hold nose>:

  o an early optimization will be that each bgpspeaking AS adds a one
    byte prepend count, over which it signs.  this saves signing 92
    prepends.  the count is normally one.

  o a bgpsec-speaking 'transparent' route server signs over a zero
    prepend count.

  o bgpsec speakers calculate as path length by summing prepend counts.

  o a bgpsec speaker passing a signed announcement to a non-speaker
    expands all prepends.  of course, the expansion of a zero prepend
    is rather small.

<release nose>

randy

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