Merge pull request #7572 from idryzhov/ospf6-cleanup

[mirror_frr.git] / doc / developer / ospf-sr.rst

diff --git a/doc/developer/ospf-sr.rst b/doc/developer/ospf-sr.rst
index 23bc803d76368f32d17ee0958e0e99e9e16915fb..efe9b1b12f9aac37394d0cd67c5be4b94011b755 100644 (file)
--- a/doc/developer/ospf-sr.rst
+++ b/doc/developer/ospf-sr.rst
@@ -1,8 +1,7 @@
 OSPF Segment Routing
 ====================
 
-This is an EXPERIMENTAL support of draft
-`draft-ietf-ospf-segment-routing-extensions-24`.
+This is an EXPERIMENTAL support of `RFC 8665`.
 DON'T use it for production network.
 
 Supported Features
@@ -10,19 +9,20 @@ Supported Features
 
 * Automatic computation of Primary and Backup Adjacency SID with
   Cisco experimental remote IP address
-* SRGB configuration
+* SRGB & SRLB configuration
 * Prefix configuration for Node SID with optional NO-PHP flag (Linux
   kernel support both mode)
 * Node MSD configuration (with Linux Kernel >= 4.10 a maximum of 32 labels
   could be stack)
 * Automatic provisioning of MPLS table
+* Equal Cost Multi-Path (ECMP)
 * Static route configuration with label stack up to 32 labels
 
 Interoperability
 ----------------
 
 * Tested on various topology including point-to-point and LAN interfaces
-  in a mix of Free Range Routing instance and Cisco IOS-XR 6.0.x
+  in a mix of FRRouting instance and Cisco IOS-XR 6.0.x
 * Check OSPF LSA conformity with latest wireshark release 2.5.0-rc
 
 Implementation details
@@ -147,7 +147,7 @@ modify the Segment Routing Global Block (SRGB) and Maximum Stack Depth (MSD)
 TLV. Only Shortest Path First (SPF) Algorithm is supported, so no possibility
 to modify this TLV is offer by the code.
 
-When Opaque LSA Tyep 4 i.e. Router Information are stored in LSDB, function
+When Opaque LSA Type 4 i.e. Router Information are stored in LSDB, function
 `ospf_opaque_lsa_install_hook()` will call the previously registered function
 `ospf_router_info_lsa_update()`. In turn, the function will simply trigger
 `ospf_sr_ri_lsa_update()` or `ospf_sr_ri_lsa_delete` in function of the LSA
@@ -243,16 +243,16 @@ Routing.
    router ospf
     ospf router-id 192.168.1.11
     capability opaque
-     mpls-te on
-     mpls-te router-address 192.168.1.11
-    router-info area 0.0.0.0
     segment-routing on
     segment-routing global-block 10000 19999
+    segment-routing local-block 5000 5999
     segment-routing node-msd 8
     segment-routing prefix 192.168.1.11/32 index 1100
 
-The first segment-routing statement enable it. The Second one set the SRGB,
-third line the MSD and finally, set the Prefix SID index for a given prefix.
+The first segment-routing statement enables it. The second and third one set
+the SRGB and SRLB respectively, fourth line the MSD and finally, set the
+Prefix SID index for a given prefix.
+
 Note that only prefix of Loopback interface could be configured with a Prefix
 SID. It is possible to add `no-php-flag` at the end of the prefix command to
 disable Penultimate Hop Popping. This advertises to peers that they MUST NOT pop
@@ -265,9 +265,6 @@ Known limitations
 * Only single Area is supported. ABR is not yet supported
 * Only SPF algorithm is supported
 * Extended Prefix Range is not supported
-* MPLS table are not flush at startup. Thus, restarting zebra process is
-  mandatory to remove old MPLS entries in the data plane after a crash of
-  ospfd daemon
 * With NO Penultimate Hop Popping, it is not possible to express a Segment
   Path with an Adjacency SID due to the impossibility for the Linux Kernel to
   perform double POP instruction.