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Allowed optimized exporting of a subprefix tree

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Added an option for export filter to allow for prefiltering based on the
prefix. Routes outside the given prefix are completely ignored. Config
is simple:

	export in <net> <filter>;
This commit is contained in:
Maria Matejka
2022-06-22 12:45:42 +02:00
parent 050b4b4e5e
commit 9c9059fd17
9 changed files with 111 additions and 20 deletions
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8
doc/bird.sgml
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@@ -914,10 +914,12 @@ inherited from templates can be updated by new definitions.
<cf/none/ is for dropping all routes. Default: <cf/all/ (except for
EBGP).
<tag><label id="proto-export">export <m/filter/</tag>
<tag><label id="proto-export">export [ in <m/prefix/ ] <m/filter/</tag>
This is similar to the <cf>import</cf> keyword, except that it works in
the direction from the routing table to the protocol. Default: <cf/none/
(except for EBGP).
the direction from the routing table to the protocol. If <cf/in/ keyword is used,
only routes inside the given prefix are exported. Other routes are completely
ignored (e.g. no logging and no statistics).
Default: <cf/none/ (except for EBGP).
<tag><label id="proto-import-keep-filtered">import keep filtered <m/switch/</tag>
Usually, if an import filter rejects a route, the route is forgotten.