This read-only TruthValue reports whether the router supports Opaque LSA types, LS type 9/10/11, used to carry extended application data like traffic-engineering info within OSPF, per its description, and specifically notes this value cannot be changed while OSPF is active and operStatus is up. Opaque LSA support is what allows features like MPLS-TE or GMPLS extensions to piggyback their link-state data on the OSPF flooding mechanism, so a false value here would explain why a TE-dependent feature isn't propagating link attributes as expected. An engineer enabling a traffic-engineering feature that unexpectedly fails to advertise link attributes would check this value, and would need to bring OSPF operationally down to change it if it were disabled.