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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">According to my knowledge letter “i” in “</span><span style="font-size:11.0pt">[AS201701i]</span><span lang="EN-US" style="font-size:11.0pt">” means “IGP”. “e” is for
“EGP” and “?” is for “INCOMPLETE”. This is for BGP origin code.</span><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"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Other method to check eBGP vs iBGP is to check which protocol learned given route and then verify configuration of protocol or do `show protocol all` to figure out if
it was eBGP or iBGP session. It works but it is indirect method which requires extra steps. It would be useful and timesaving that `show route` shows this information directly. Is it problem with proper “print” function for “show route” or Bird just don’t
keep such info together with route due to performance issues or memory saving?<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>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;color:black">Regards,</span><span style="font-size:11.0pt;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black;mso-fareast-language:EN-US">Grzegorz</span><span style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<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 style="font-family:"Calibri",sans-serif;color:black">From:
</span></b><span style="font-family:"Calibri",sans-serif;color:black">Bird-users <bird-users-bounces@network.cz> on behalf of Maximilian Wilhelm <max@rfc2324.org><br>
<b>Date: </b>Wednesday, 18 September 2024 at 21:01<br>
<b>To: </b>"bird-users@network.cz" <bird-users@network.cz><br>
<b>Subject: </b>Re: Info about eBGP/iBGP<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">!-------------------------------------------------------------------|<o:p></o:p></p>
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<p class="MsoNormal"> This Message Is From an Untrusted Sender<o:p></o:p></p>
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<p class="MsoNormal"> You have not previously corresponded with this sender.<o:p></o:p></p>
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<p class="MsoNormal">|-------------------------------------------------------------------!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Anno domini 2024 Ponikierski, Grzegorz via Bird-users scripsit:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Am I blind (possible) or Bird doesn’t show if route is eBGP or iBGP? If it shows it, then can you please help me to see it?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I don't think there is an indication whether a route was learned<o:p></o:p></p>
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<p class="MsoNormal">locally via iBGP or eBGP. Depending on your environment there may be<o:p></o:p></p>
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<p class="MsoNormal">some clues though.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you're using route reflectors, routes learned from one of the RRs<o:p></o:p></p>
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<p class="MsoNormal">will have an originator ID and cluster list set.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Also a route has the originating AS shown in the last column of the output,<o:p></o:p></p>
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<p class="MsoNormal">e.g.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">0.0.0.0/0 via 100.64.0.234 on gre_ffrl_fra_a [ffrl_fra_a 2024-08-06] * (200) [AS201701i]<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">A route learned via iBGP AND originating from the internal AS shows as<o:p></o:p></p>
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<p class="MsoNormal">just '[i]' (for origin internal):<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">10.132.251.53/32 via 10.132.252.5 on vlan1012 [infra_upb_in_ffho_net 2024-07-26 from 10.132.255.34] * (100/100) [i]<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Note that this only works as distinction if a route was originated<o:p></o:p></p>
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<p class="MsoNormal">internally; it will not work for a route learned from an external peer<o:p></o:p></p>
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<p class="MsoNormal">and further originated internally.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Best,<o:p></o:p></p>
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<p class="MsoNormal">Max<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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