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<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">We have observed strange behavior where BIRD is not adding ASN on EBGP export.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Route is received on IBGP session within AS20940:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">r04.border01.lon03.fab > bird show config template bgp 4INTERECOR_ROUTERS<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">template bgp '4INTERECOR_ROUTERS' {<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> local as 20940;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> neighbor as 20940;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><br>
<br>
r04.border01.lon03.fab> show route protocol 23.210.49.60__r24.lon02.ien for 20.135.0.0/16 all<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Executing "/usr/sbin/birdc show route protocol '23.210.49.60__r24.lon02.ien' for 20.135.0.0/16 all"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Table master4:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">20.135.0.0/16 unicast [23.210.49.60__r24.lon02.ien 2024-10-07] (100) [AS8075i]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> via 23.210.49.60 on ae1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> Type: BGP univ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.origin: IGP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.as_path: 8075<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.next_hop: 23.210.49.60<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.med: 4294967294<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.local_pref: 350<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Route ASPATH: 8075 which is expected.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">We are exporting this route on EBGP session from private ASN 4290006033 <-> to private ASN:</span>
<span style="font-family:Consolas;color:#156082">4290006002:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">r04.border01.lon03.fab> show route export 2a02:26f0:1880:3702::1__r01.stem01 for 20.135.0.0/16 all<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Executing "/usr/sbin/birdc show route export '2a02:26f0:1880:3702::1__r01.stem01' for 20.135.0.0/16 all"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Table master4:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">20.135.0.0/16 unicast [2.22.144.250__r01.sdn 2024-10-07 from 2.22.144.250] * (100) [AS8075i]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> via 23.210.49.60 on ae1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> Type: BGP univ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.origin: IGP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.as_path: 8075<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.next_hop: 23.210.49.60<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.med: 4294967294<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.local_pref: 777<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Route is received on 4290006002:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">r01.stem01.lon03.fab> show route protocol 2a02:26f0:1880:3702::__r04.border01 for 20.135.0.0/16 all<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Executing "/usr/sbin/birdc show route protocol '2a02:26f0:1880:3702::__r04.border01' for 20.135.0.0/16 all"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Table master4:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">20.135.0.0/16 unicast [2a02:26f0:1880:3702::__r04.border01 2024-10-07] * (100) [AS8075i]<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> via 2a02:26f0:1880:3702:: on ae4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> Type: BGP univ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.origin: IGP<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.as_path: 4290006033 8075<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.next_hop: 2a02:26f0:1880:3702:: fe80::b6db:91ff:fe8b:1eb4<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"> BGP.local_pref: 100<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">ASPATH: 4290006033 8075<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">We are missing AS 20940 on which essentially this prefix is received in our network!?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082">Is this behavior expected?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#156082"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:Consolas;color:#44546A;mso-ligatures:none">Kind Regards,</span></b><span style="font-family:"Calibri",sans-serif;color:#44546A;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#44546A;mso-ligatures:none"> </span><span style="font-family:"Calibri",sans-serif;color:#44546A;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:Consolas;color:#44546A;mso-ligatures:none">Radek Ochalski</span><span style="font-family:"Calibri",sans-serif;color:#44546A;mso-ligatures:none"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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