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Static: Support for multiple routes with the same network

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Add support for proper handling of multiple routes with the same network
to the static protocol. Routes are distinguished by internal index, which
is assigned automatically (sequentially for routes within each network).
Having different route preference or igp_metric attribute is optional.
This commit is contained in:
Ondrej Zajicek (work)
2020-11-19 16:38:39 +01:00
parent df65d519d6
commit 3347aaafec
3 changed files with 91 additions and 18 deletions
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doc/bird.sgml
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@@ -4938,8 +4938,15 @@ default route to prevent routing loops).
<p>There are three classes of definitions in Static protocol configuration --
global options, static route definitions, and per-route options. Usually, the
definition of the protocol contains mainly a list of static routes.
Static routes have no specific attributes.
definition of the protocol contains mainly a list of static routes. Static
routes have no specific attributes, but <ref id="rta-igp-metric" name="igp_metric">
attribute is used to compare static routes with the same preference.
<p>The list of static routes may contain multiple routes for the same network
(usually, but not necessary, distinquished by <cf/preference/ or <cf/igp_metric/),
but only routes of the same network type are allowed, as the static protocol
has just one channel. E.g., to have both IPv4 and IPv6 static routes, define two
static protocols, each with appropriate routes and channel.
<p>Global options: