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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Thank you for your help. Unfortunately, this does not seem to solve my problem, so I’ll try to explain it in more detail.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">IXP1: This is our IXP<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">IXP2: A different IXP in a different physical location<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">IXP3: A different IXP in a different physical location<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">IXP4: A different IXP in a different physical location<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">We have Layer</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Cambria Math",serif;mso-fareast-language:EN-US">‑</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">2
transport to all other IXPs, allowing us to carry their peering LANs and, in turn, provide ours to them. At the moment, only one of these IXPs has more than one customer; this is the reason for my request regarding
</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">“</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">one port with two customers,</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">”</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">
although in theory there could be more than two.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">The second issue is the following: if customers on our IXP want to connect to one of the other IXPs (IXP2, IXP3, IXP4), I need to configure the corresponding VLANs for
those IXPs on the customer-facing port.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">We configure our switches manually, so there is no need for templates on the IXP Manager side. However, I would like to achieve the following:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Each customer should only see their own traffic on the port connected to our IXP.<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">A correct and clean way to model the VLANs of the other IXPs in IXP Manager, without breaking the automatic Route
Server or Nagios configuration.<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">I hope this clarifies the situation and that there is a suitable solution.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Thank you in advance for your time and help.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.5pt;font-family:"Tahoma",sans-serif;color:#262626">Roland Christanell</span></b><span lang="EN-US">
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> ixpmanager <ixpmanager-bounces@inex.ie>
<b>On Behalf Of </b>Barry O'Donovan (INEX) via ixpmanager<br>
<b>Sent:</b> Dienstag, 21. April 2026 17:56<br>
<b>To:</b> INEX IXP Manager Users Mailing List <ixpmanager@inex.ie><br>
<b>Cc:</b> Barry O'Donovan (INEX) <barry.odonovan@inex.ie><br>
<b>Subject:</b> Re: [ixpmanager] IXPManager: Two customers on one port<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Hi Roland,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Yes, this is the perfect place for such questions!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif">As Chris says, you can use subinterfaces, which are supported by IXP Manager, at least certainly the type that creates what appears via snmp as a standard interface, like Arista’s
implementation. Sample config below, but it needs a specific tcam profile, which you’d be best to get from your Arista support team, as any other config/services you have defined would need to be considered.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif">The other, less technical way, is to use fanout ports. This means you burn a port for the uplink and then two ports for each member delivered via that uplink. See the docs for
this at <a href="https://docs.ixpmanager.org/latest/features/reseller/">https://docs.ixpmanager.org/latest/features/reseller/</a>. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> - Barry<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.5pt;font-family:"Avenir Next",serif">Sample Arista Config</span></b><span style="font-size:10.5pt;font-family:"Avenir Next",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif">vlan 10<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> name peeringlan<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif">interface Ethernet25<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> description Reseller: Acme Ltd<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> load-interval 30<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> no switchport<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> no lldp transmit<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> no lldp receive<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif"> no sflow enable<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">interface Ethernet25.2001<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> description Cust: Resold Customer 1 Ltd<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> load-interval 30<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> encapsulation dot1q vlan 2001<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> vlan id 10<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> mac access-group l2acl-ixp-resold-cust in<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> service-policy type qos input pm-subinterface-1g<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">interface Ethernet25.2002<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> description Cust: Resold Customer 2 Ltd<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> load-interval 30<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> encapsulation dot1q vlan 2002<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> vlan id 10<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> ...<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">On 21/04/2026 14:37:23, "Christopher Rössler via ixpmanager" <<a href="mailto:ixpmanager@inex.ie">ixpmanager@inex.ie</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Hi,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Have you thought about using a reseller uplink interface for the "other IXP" and putting the actual customers into resold subinterfaces?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Kind regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">chris<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">On Tue, Apr 21, 2026 at 3:04 PM Roland Christanell | Telmekom via ixpmanager <<a href="mailto:ixpmanager@inex.ie">ixpmanager@inex.ie</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Hello,<o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">I hope this is the right place to ask this question.</span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">I am using IXP Manager v7.1.0 and have 2 customers that are connected on one port, the reason
is that this is some kind for “transport” from another IXP and therefore multiple customers can be connected on one port.
</span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Currently only one member has the actual port assigned and this leads to the problem, that
for the second one I have traffic graph and the traffic off both is seen on the graph of the first member.</span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> </span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Best regards,</span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"> </span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><b><span lang="EN-US" style="font-size:11.5pt;font-family:"Tahoma",sans-serif;color:#262626">Roland Christanell</span></b><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">
<br>
</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Tahoma",sans-serif;color:#262626">Network Engineer</span><span lang="EN-US" style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">
<br>
<br>
</span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><img border="0" width="29" height="3" style="width:.302in;height:.0312in" id="m_-50251290861082930190.5xfjcwpo7i5" src="cid:image001.png@01DCD330.91BDFAB0" alt="Rechteck.png"></span><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">_______________________________________________<br>
INEX IXP Manager mailing list<br>
<a href="mailto:ixpmanager@inex.ie">ixpmanager@inex.ie</a><br>
Unsubscribe or change options here: <a href="https://www.inex.ie/mailman/listinfo/ixpmanager">
https://www.inex.ie/mailman/listinfo/ixpmanager</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><br clear="all">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><br>
<span class="gmailsignatureprefix">-- </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black">Christopher Rössler, Network Engineer<br>
<a href="mailto:christopher.roessler@bcix.de">christopher.roessler@bcix.de</a><br>
+49 30 2332195 37<br>
<br>
BCIX Management GmbH<br>
Albrechtstr. 110<br>
12103 Berlin<br>
Germany<br>
<br>
Geschäftsführer/Managing Directors: Jens Lietzmann, André Grüneberg<br>
Handelsregister: Amtsgericht Charlottenburg, HRB 143581 B<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.5pt;font-family:"Avenir Next",serif;color:black"><br>
Kind regards, <br>
Barry O'Donovan <br>
INEX Operations<br>
<br>
<a href="https://www.inex.ie/support/">https://www.inex.ie/support/</a> <br>
+353 1 531 3339<br>
<br>
<o:p></o:p></span></p>
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