Extends multipath support for OSPF.

[thirdparty/bird.git] / doc / bird.sgml

diff --git a/doc/bird.sgml b/doc/bird.sgml
index 07e75588346f7880de8ebb352bdb2816ab534935..fa4c777fcde211b28d14c9bb0d49a7f88dec1cf1 100644 (file)
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -2291,6 +2291,7 @@ protocol ospf <name> {
        stub router <switch>;
        tick <num>;
        ecmp <switch> [limit <num>];
+       merge external <switch>;
        area <id> {
                stub;
                nssa;
@@ -2396,6 +2397,14 @@ protocol ospf <name> {
        nexthops in one route. By default, ECMP is disabled. If enabled,
        default value of the limit is 16.
 
+       <tag>merge external <M>switch</M></tag>
+       This option specifies whether OSPF should merge external routes from
+       different routers/LSAs for the same destination. When enabled together
+       with <cf/ecmp/, equal-cost external routes will be combined to multipath
+       routes in the same way as regular routes. When disabled, external routes
+       from different LSAs are treated as separate even if they represents the
+       same destination. Default value is no.
+
        <tag>area <M>id</M></tag>
        This defines an OSPF area with given area ID (an integer or an IPv4
        address, similarly to a router ID). The most important area is the