doc: OSPFv3 NSSA command document

Document added for ospfv3 nssa command.

Signed-off-by: Kaushik <kaushiknath.null@gmail.com>

diff --git a/doc/user/ospf6d.rst b/doc/user/ospf6d.rst
index 2b478d334eb4ffc0b976886366c161b30528d46e..59a3af7645189281182b9b1e79b33f02ab0299da 100644 (file)
--- a/doc/user/ospf6d.rst
+++ b/doc/user/ospf6d.rst
@@ -83,7 +83,25 @@ OSPF6 router
 OSPF6 area
 ==========
 
-Area support for OSPFv3 is not yet implemented.
+.. index:: [no] area A.B.C.D nssa
+.. clicmd:: [no] area A.B.C.D nssa
+
+NSSA Support in OSPFv3
+=======================
+
+The configuration of NSSA areas in OSPFv3 is supported using the CLI command
+area A.B.C.D nssa  in ospf6 router configuration mode.
+The following functionalities are implemented as per RFC 3101:
+
+1. Advertising Type-7 LSA into NSSA area when external route is redistributed
+   into OSPFv3
+2. Processing Type-7 LSA received from neighbor and installing route in the
+   route table
+3. Support for NSSA ABR functionality which is generating Type-5 LSA when
+   backbone area is configured. Currently translation od TYpe-7 LSA to Type-5 LSA
+   is enabled by default.
+4. Support for NSSA Translator functionality when there are multiple NSSA ABR
+   in an area
 
 .. _ospf6-interface: