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Implements OSPF stub router option (RFC 3137).

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Also fixes OSPFv3 routing table calculcation w.r.t.
errata 2078 to RFC 5340.
This commit is contained in:
Ondrej Zajicek
2013-06-11 12:12:11 +02:00
parent 924868543c
commit f623ab9875
6 changed files with 27 additions and 7 deletions
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10
doc/bird.sgml
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@@ -1904,6 +1904,7 @@ on nonbroadcast networks.
<code>
protocol ospf &lt;name&gt; {
rfc1583compat &lt;switch&gt;;
stub router &lt;switch&gt;;
tick &lt;num&gt;;
ecmp &lt;switch&gt; [limit &lt;num&gt;];
area &lt;id&gt; {
@@ -1983,6 +1984,15 @@ protocol ospf &lt;name&gt; {
url="ftp://ftp.rfc-editor.org/in-notes/rfc1583.txt">. Default
value is no.
<tag>stub router <M>switch</M></tag>
This option configures the router to be a stub router, i.e.,
a router that participates in the OSPF topology but does not
allow transit traffic. In OSPFv2, this is implemented by
advertising maximum metric for outgoing links, as suggested
by RFC 3137<htmlurl url="ftp://ftp.rfc-editor.org/in-notes/rfc3137.txt">.
In OSPFv3, the stub router behavior is announced by clearing
the R-bit in the router LSA. Default value is no.
<tag>tick <M>num</M></tag>
The routing table calculation and clean-up of areas' databases
is not performed when a single link state