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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I’m quite sure this cannot be done, but I also know there is a lot of BIRD I still don’t know, so here it goes:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Is there any way to filter a export route based on another BGP session status?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For the sake of simplicity let’s say we have just two providers A and B, and I only want to export some specific routes to B when A is down.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I can do it externally with a quite simple script (For example: Check if the provider is down via CLI and if it’s down insert the routes I want to export to a kernel table and export that to provider B) but it would be
nice if I could do it directly in Bird.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I’ve been scratching my head around this, but unless there is something like if proto.A == down on the filters I don’t really see how to do it (Or maybe some way to raise a global flag based on if I’m receiving routes
via provider B, but I don’t think that can’t be done either.)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks for your time!<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Xavier<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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