Hi All,
As some of you may remember, few years ago, long time before the
protocol has been standardized, an idea of inter-ALTO communication has
been proposed. As the protocol is now ready and extensions are beeing
developed, I'd like to raise your attention to this communication scheme
again :-)
Since it's not possible to discuss the proposal within 5', I'll raise
some issues on the list.
1. The rationale
Some (maybe out-of-date) rationale can be found in
draft-dulinski-alto-inter-problem-statement-01 from July 2011. For me,
the two most important use-cases in which operators significantly may
benefit from map exchange are (a) route assymmetry and (b) remote isp's
preference.
Regarding (a), the core ALTO protocol focuses on comparing traffic
destination endpoints (thanks to, e.g., data from BGP tables). If an
ALTO server is aware of routes towards the AS it belongs to, it may
compare traffic sources between each other. In (b), I assume that
information form remote ASes may make endpoints from the same AS (e.g.,
assigned to the same PID due the same AS-PATH) distinguishable.
Since YMMV, I'd be glad to hear your voice to come out with a set of
really important issues to be solved by inter-ALTO. I don't want to
start an academic discussion and think of a lot of generic and specific
use-cases.
2. General requirements
Base on the use-cases, a question may be raised: is there any set of
information that has to be provided every time an ALTO server says it
implements inter-ALTO? Some other requirements that have to be
investigated include authentication, information confidentiality,
incremental updatest etc.
3. Does any IETF RFC/draft address all the reqs?
I do not know of any.
4. Extension spec
E.g., should it be contained within one draft or split into problem
statment / reqs / definition?
Best regards,
Piotr
--
Piotr 'GhosT' Wydrych .. xmpp:wydrych//agh.edu.pl .. http://wydrych.net/
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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