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<p>Hello,</p>
<p>Regarding longer prefix propagation ...an obvious case is this: <br>
</p>
<p>As IPv4 space has been exhausted, we in GRNET, tend to assign
even longer prefixes to our members [aka customers] ( /26,/27...up
to /29). When multi-homing is desired by the member then the other
SP should propagate longer prefixes to its upstream in order to
service the member. In our turn we need to de-aggregate the same
long, part of our supernet, prefix and advertise it to our
upstreams in order to let the customer to choose the desired
path. <br>
</p>
<p>We've exchanged few mails about that in the list, some time ago.
Of course there are other variations to this scenario. <br>
</p>
<p>If you like, we could organize a more detailed discussion about
this topic during our next GRNOG technical meeting.</p>
<p>Regards</p>
<p>Tasos<br>
</p>
<br>
<div class="moz-cite-prefix">On 13/07/2018 09:07 πμ, Nikos
Leontsinis wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAE6y_uRc0doDzkq-ZLBAysBHn1i45x7YUDe97fhnzJtSCz2Z3w@mail.gmail.com">
<div dir="ltr">
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EL">Παρακολουθησα την ημεριδα απο το<span> </span></span>ipad<span
lang="EL">.<span> <span> </span></span>Χαιρετιζω την
προσπαθεια και συγχαρητηρια σε ολους<span> <span> </span></span>τους
συντελεστες.<span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EL">Ισως οι<span> </span></span>vendors<span lang="EL"><span> </span>θα
μπορουσαν να συμμετεχουν και να υπστηριζουν εδω.<span></span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EL"><span> </span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
style="font-size:11pt">A few comments about the security
discussion:</span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
style="font-size:14.6667px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Let’s
just say rfc 7454 is a good place to start.</span>
<br>
</p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
<ol start="1"
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin-top:0in;margin-bottom:0in"
type="1">
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif"><i>The
RIPE community has documented that:<span> <span> </span></span>IPv4<span> <span> </span></span>prefixes
longer than /24 and IPv6 prefixes longer than /48 are<span></span></i></li>
</ol>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><i><span> <span> </span></span>generally
neither announced nor accepted in the Internet</i><span> </span>and
there is a best practice rfc supporting that view too:<span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span
class="gmail-MsoHyperlink"
style="color:rgb(5,99,193);text-decoration:underline"><a
href="https://tools.ietf.org/html/rfc7454"
style="color:rgb(5,99,193);text-decoration:underline"
moz-do-not-send="true">https://tools.ietf.org/html/rfc7454</a></span><span> </span>which
by the way also mentions the ttl security feature mentioned
(of course the<span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif">approach
is applicable for the igp too but this is another discussion.)<span> </span><span
lang="EN-GB"><span> </span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><br>
</p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif">Further
to that, it would be interesting to explore the opposite view<span> <span> </span></span>i.e
why someone would be willing to start propagating<span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span> </span>/25s
and /26s? I don’t see a reason but there might be merits to
that view.<span></span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
</div>
</blockquote>
<blockquote type="cite"
cite="mid:CAE6y_uRc0doDzkq-ZLBAysBHn1i45x7YUDe97fhnzJtSCz2Z3w@mail.gmail.com">
<div dir="ltr">
<ol start="2"
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin-top:0in;margin-bottom:0in"
type="1">
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Bogon
Ass should be filtered too:<span></span></li>
</ol>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB"><span> </span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB">0<span></span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB">23456<span></span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB">64496 – 131071<span></span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB">4200000000 – 4294967295<span></span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span
lang="EN-GB">RFC5398, RFC6996, RFC7300<span></span></span></p>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
<ol start="3"
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin-top:0in;margin-bottom:0in"
type="1">
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">We
don’t do full automation and we will never do simply because
automation is not compatible with flexibility. The network
is more complex than an application.<span></span></li>
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">The
idea to write 250K lines of a prefix-list<span> <span> </span></span>is
not rational. Simply doesn’t scale.<span></span></li>
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">There
are no customer obligations there are obligations of any
internet citizen as stipulated by RIPE.<span></span></li>
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">The
idea to outsource<span> <span> </span></span>filtering<span> <span> </span></span>to
the provider is a pragmatic one<span> <span> </span></span>and<span> <span> </span></span>can
be part of the managed services portfolio<span> <span> </span></span>offered
for many years. The brave new world promises to lower<span></span></li>
</ol>
<p class="gmail-MsoListParagraph"
style="text-decoration-style:initial;text-decoration-color:initial;margin:0in
0in 0.0001pt
0.5in;font-size:11pt;font-family:Calibri,sans-serif">barriers
to market entry,<span> <span> </span></span>empowering the
provider with<span> <span> </span></span>all these tasks.<span></span></p>
<ol start="7"
style="font-size:small;text-decoration-style:initial;text-decoration-color:initial;margin-top:0in;margin-bottom:0in"
type="1">
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">How
many of you have supported/adopted rfc 7999 wouldn’t that
make internet a better place?<span></span></li>
<li class="MsoNormal" style="margin:0in 0in
0.0001pt;font-size:11pt;font-family:Calibri,sans-serif">Also
another aspect not mentioned but important is to encourage
the use of public but non publicly routable address space in
the interconnections.<span></span></li>
</ol>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span>Regards,</span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span><br>
</span></p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif">/nikos</p>
<p class="MsoNormal" style="margin:0in 0in
0.0001pt;text-decoration-style:initial;text-decoration-color:initial;font-size:11pt;font-family:Calibri,sans-serif"><span><br>
</span></p>
<br class="gmail-Apple-interchange-newline">
<br>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">2018-07-11 0:37 GMT+01:00 Andreas
Polyrakis <span dir="ltr"><<a
href="mailto:apolyr@noc.grnet.gr" target="_blank"
moz-do-not-send="true">apolyr@noc.grnet.gr</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<p>Καλησπέρα,</p>
<p>Στον απόηχο ενός πολύ πετυχημένου GRNOG7*, θα θέλαμε
να σας ενημερώσουμε πως στη <a
href="https://www.grnog.gr/7th-meeting/"
target="_blank" moz-do-not-send="true">σελίδα της
διοργάνωσης</a> έχουν αναρτηθεί οι παρουσιάσεις, το
βίντεο, φωτογραφίες και γενικότερα το υλικό της
συνάντησης.<br>
</p>
<p>Θυμίζουμε πως η <a
href="https://goo.gl/forms/0Q9Xcgnk060EG8Lz2"
target="_blank" moz-do-not-send="true">αξιολόγησή</a>
σας είναι σημαντική για την διατήρηση του υψηλού
επιπέδου της διοργάνωσης. Το link θα παραμείνει ενεργό
για λίγες ημέρες ακόμα.<br>
</p>
<p>Και πάλι σας ευχαριστούμε θερμά για την ενεργή
συμμετοχή σας!<br>
</p>
<p>Η επιτροπή του GRNOG,<br>
Κώστας Ζορμπαδέλος<br>
Μιχάλης Μπερσίμης<br>
Μιχάλης Οικονομάκος<br>
Ανδρέας Πολυράκης</p>
<p>* 111 εγγραφές, 11+2 παρουσιάσεις, ένα panel, με 3
ομιλητές να ταξιδεύουν επί τούτου από το εξωτερικό και
ένας από άλλη πόλη της Ελλάδας, live streaming &
recording -- και όλα αυτά σε ένα υπέρχο χώρο!<span
class="HOEnZb"><font color="#888888"><br>
</font></span></p>
<span class="HOEnZb"><font color="#888888">
<p><br>
</p>
<pre cols="72">--
------------------------------<wbr>------------------------------<wbr>-----------
Andreas Polyrakis - <a href="mailto:apolyr@noc.grnet.gr" target="_blank" moz-do-not-send="true">apolyr@noc.grnet.gr</a>
GRNET NOC Technical Manager
Greek Research & Technology Network - <a href="http://www.grnet.gr" target="_blank" moz-do-not-send="true">http://www.grnet.gr</a>
<a href="https://maps.google.com/?q=7,+Kifisias+Av.,+Ampelokipi,+11523+Athens,+Greece&entry=gmail&source=g" moz-do-not-send="true">7, Kifisias Av., Ampelokipi, 11523 Athens, Greece</a>
Mobile: +30 6972832445 Office: +30 2107474249 Fax: +30 2107474490
------------------------------<wbr>------------------------------<wbr>-----------
</pre>
</font></span></div>
</blockquote>
</div>
<br>
</div>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
---------------------------------------------------------------
Tasos Karaliotas - <a class="moz-txt-link-abbreviated" href="mailto:karaliot@noc.grnet.gr">karaliot@noc.grnet.gr</a>
Greek Research& Technology Network - <a class="moz-txt-link-freetext" href="http://www.grnet.gr">http://www.grnet.gr</a>,
7, Kifisias Av., Ampelokipi, 11523 Athens, Greece
Office: +302107471097 Fax: +302107474490
--------------------------------------------------------------- </pre>
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