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<body style="color: rgb(0, 0, 0); overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div><br /></div><div><br /></div><div>Hi Tom,</div><div><br /></div><div>An ASN, among other things, defines a specific routing policy, and in the case of route servers, that’s multilateral peering as defined by rfc7947. </div><div><br /></div><div>The route server configuration explicitly prevents the same peer ASN peering with them. This is very much on purpose.</div><div><br /></div><div>In your case, there’d be the additional issue of your routes potentially having no ASN or, inexplicitly and unexpectedly, having the route server ASN suddenly appear on your members' routing tables. Remember - route server ASNs are transparent.</div><div><br /></div><div>When I last looked, ASNs from LACNIC had a once-off allocation fee. The best thing to do here is to register a new ASN for the IXP’s own management systems. This is what most IXPs do, including INEX.</div><div><br /></div><div> - Barry</div><div><br /></div><div><br /></div>
<div x-em-replyforwardheader=""><br /></div>
<div>
<div>------ Original Message ------</div>
<div>From "Tom Lima via ixpmanager" <<a href="mailto:ixpmanager@inex.ie">ixpmanager@inex.ie</a>></div>
<div>To <a href="mailto:ixpmanager@inex.ie">ixpmanager@inex.ie</a></div>
<div>Cc "Tom Lima" <<a href="mailto:tom@infnoc.net">tom@infnoc.net</a>></div>
<div>Date 05/04/2025 06:41:35</div>
<div>Subject [ixpmanager] Allow a peer with the same AS number as the route-servers</div></div><div x-em-quote=""><br /></div>
<div id="xe2674c1e4aad4db"><blockquote cite="0961c203-be40-4ec3-8727-a32ce05cc437@infnoc.net" type="cite" class="cite2">
<p>Hello everyone, <br />
</p>
<p><br />
</p>
<p>I would like to know how I can modify/add so I can allow a peer
with the same ASN as the route server ASNs.
</p>
<p><br />
</p>
<p>Reason is our IXP doesn't have separate ASNs for management and
Route-Servers, and I need to announce the ASN other prefixes that
provides a few tools to the users (Looking Glass, Graphs, etc).
</p>
<p><br />
</p>
<p>We do have a /23 prefix, which a /24 is allocated to the IXP
Exchange VLAN, and the other /24 is for management purposes. We do
need to announce that /24 management address using the same ASN
that run the route-server service.
</p>
<p><br />
</p>
<p>I tried adding a Internal User and Peer with the AS, but
IXPManager/Bird doesn't create the BGP sessions for that peer.
<br />
</p>
<p><br />
</p>
<p>Let me know what I need to edit to allow this behavior. <br />
</p>
<p><br />
</p>
<p>Best regards<br />
</p>
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<td style="padding-top: 15px;FONT-FAMILY: Arial, sans-serif;" valign="top"> <font color="#0065ff"><span style="font-size: 12pt;"><strong class="ng-binding">Tom Lima</strong></span></font><span style="font-size: 12pt; color: rgb(44, 125, 165);"><br />
</span> <span class="ng-binding ng-scope"><font size="2">Network
Engineeer Consultant
</font></span><span style="font-size: 9pt;" class="ng-binding ng-scope"><br />
<br />
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WhatsApp: +55 (41) 2018-2165<br />
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