doc: Update documentation for Traffic Engineering

Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>
diff --git a/doc/mpls/ospfd.conf b/doc/mpls/ospfd.conf
index 6be11f9..2b15fa4 100644
--- a/doc/mpls/ospfd.conf
+++ b/doc/mpls/ospfd.conf
@@ -17,6 +17,7 @@
 interface fxp0
  ip ospf hello-interval 60
  ip ospf dead-interval 240
+ mpls-te on
  mpls-te link metric 999
  mpls-te link max-bw 1.25e+06
  mpls-te link max-rsv-bw 1.25e+06