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<div class="moz-cite-prefix">Baldur Norddahl wrote on 5/18/2019 3:57
AM:</div>
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cite="mid:CAPkb-7CdgtJ7_wz7-FJn2n1Dwr+s-b=JGS3AEMVJv3j69WP6iQ@mail.gmail.com">
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<div class="gmail_quote">...<br>
<div>One router knows about 2 paths, the other about 4
paths. Why? Because BGP only advertises the route that
is in use. Everyone here of course knows this, I am just
pointing it out because culling information before
allowing it to be redistributed within your network is
what BGP is already doing anyway. It is possible to
remove some of that information from the local FIB too
without losing anything at all.</div>
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<div>Using a default also gives you a dramatically shorter
convergence time if one of the transits goes down.
Having 800k routes can be harmful to your network even
with equipment that can handle it. Yes I am aware that I
am not doing what I am preaching here, but I am
considering it :-).<br>
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Thanks for the clarification. Yes, you are correct that each router
will have its own unique view. By full view I meant that a router
has at least one route for every prefix advertised into the DFZ. One
should also expect that each transit provider will provide a slight
variation in the routes provided via its "full BGP feed" because
each transit provider has its own unique view and may include routes
in its feeds that are not advertised into the DFZ.<br>
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Appreciate the discourse my friend,<br>
--B<br>
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