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-rw-r--r--doc/bird.sgml32
1 files changed, 23 insertions, 9 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index 2435d1c..a00062e 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1655,10 +1655,12 @@ protocol ospf <name> {
tick <num>;
ecmp <switch> [limit <num>];
area <id> {
- stub <switch>;
- nssa <switch>;
+ stub;
+ nssa;
summary <switch>;
- stub cost <num>;
+ default nssa <switch>;
+ default cost <num>;
+ default cost2 <num>;
translator <switch>;
translator stability <num>;
@@ -1747,20 +1749,20 @@ protocol ospf <name> {
address, similarly to a router ID). The most important area is
the backbone (ID 0) to which every other area must be connected.
- <tag>stub <M>switch</M></tag>
+ <tag>stub</tag>
This option configures the area to be a stub area. External
routes are not flooded into stub areas. Also summary LSAs can be
- limited in stub areas (see option <cf/summary/). Default
- value is no. (Area is not stub.)
+ limited in stub areas (see option <cf/summary/).
+ By default, the area is not a stub area.
- <tag>nssa <M>switch</M></tag>
+ <tag>nssa</tag>
This option configures the area to be a NSSA (Not-So-Stubby
Area). NSSA is a variant of a stub area which allows a
limited way of external route propagation. Global external
routes are not propagated into a NSSA, but an external route
can be imported into NSSA as a (area-wide) NSSA-LSA (and
possibly translated and/or aggregated on area boundary).
- Default value is no. (Area is not NSSA.)
+ By default, the area is not NSSA.
<tag>summary <M>switch</M></tag>
This option controls propagation of summary LSAs into stub or
@@ -1771,10 +1773,22 @@ protocol ospf &lt;name&gt; {
summary LSAs could lead to more efficient routing at the cost
of larger link state database. Default value is no.
- <tag>stub cost <M>num</M></tag>
+ <tag>default nssa <M>switch</M></tag>
+ When <cf/summary/ option is enabled, default summary route is
+ no longer propagated to the NSSA. In that case, this option
+ allows to originate default route as NSSA-LSA to the NSSA.
+ Default value is no.
+
+ <tag>default cost <M>num</M></tag>
This option controls the cost of a default route propagated to
stub and NSSA areas. Default value is 1000.
+ <tag>default cost2 <M>num</M></tag>
+ When a default route is originated as NSSA-LSA, its cost
+ can use either type 1 or type 2 metric. This option allows
+ to specify the cost of a default route in type 2 metric.
+ By default, type 1 metric (option <cf/default cost/) is used.
+
<tag>translator <M>switch</M></tag>
This option controls translation of NSSA-LSAs into external
LSAs. By default, one translator per NSSA is automatically