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doc: sync ospf-sr docs from master

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Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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Quentin Young 2018-03-06 10:50:30 -05:00
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64
doc/developer/ospf-sr.rst
View File

@ -5,6 +5,26 @@ This is an EXPERIMENTAL support of draft
`draft-ietf-ospf-segment-routing-extensions-24`.
DON'T use it for production network.
Supported Features
------------------
* Automatic computation of Primary and Backup Adjacency SID with
Cisco experimental remote IP address
* SRGB 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
* 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
* Check OSPF LSA conformity with latest wireshark release 2.5.0-rc
Implementation details
----------------------
@ -176,17 +196,17 @@ yourself:
::
modprobe mpls_router
modprobe mpls_gso
modprobe mpls_iptunnel
modprobe mpls_router
modprobe mpls_gso
modprobe mpls_iptunnel
Then, you must activate MPLS on the interface you would used:
::
sysctl -w net.mpls.conf.enp0s9.input=1
sysctl -w net.mpls.conf.lo.input=1
sysctl -w net.mpls.platform_labels=1048575
sysctl -w net.mpls.conf.enp0s9.input=1
sysctl -w net.mpls.conf.lo.input=1
sysctl -w net.mpls.platform_labels=1048575
The last line fix the maximum MPLS label value.
@ -195,8 +215,8 @@ enable with:
::
ip -M route
ip route
ip -M route
ip route
The first command show the MPLS LFIB table while the second show the FIB
table which contains route with MPLS label encapsulation.
@ -207,8 +227,8 @@ especially the `lo` one. For that purpose, disable RP filtering with:
::
systcl -w net.ipv4.conf.all.rp_filter=0
sysctl -w net.ipv4.conf.lo.rp_filter=0
systcl -w net.ipv4.conf.all.rp_filter=0
sysctl -w net.ipv4.conf.lo.rp_filter=0
OSPFd
~~~~~
@ -220,16 +240,16 @@ 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 node-msd 8
segment-routing prefix 192.168.1.11/32 index 1100
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 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.
@ -248,9 +268,6 @@ Known limitations
* 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
* Due to a bug in OSPF Opaque, LSA are not flood when enable Segment Routing
through CLI once OSPFd started. You must configure Segment Routing within
configuration file before launching OSPFd
* 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.
@ -266,4 +283,3 @@ This work has been performed in the framework of the H2020-ICT-2014
project 5GEx (Grant Agreement no. 671636), which is partially funded
by the European Commission.

7
doc/user/ospfd.rst
View File

@ -1033,11 +1033,12 @@ This is an EXPERIMENTAL support of Segment Routing as per draft
currently supported. The 'no-php-flag' means NO Penultimate Hop Popping that
allows SR node to request to its neighbor to not pop the label.
.. index:: show ip ospf database segment-routing <adv-router ADVROUTER|self-originate>
.. clicmd:: show ip ospf database segment-routing <adv-router ADVROUTER|self-originate>
.. index:: show ip ospf database segment-routing <adv-router ADVROUTER|self-originate> [json]
.. clicmd:: show ip ospf database segment-routing <adv-router ADVROUTER|self-originate> [json]
Show Segment Routing Data Base, all SR nodes, specific advertized router or
self router.
self router. Optional JSON output can be obtained by appending 'json' to the
end of the command.
Debugging OSPF
==============