Hi,
As per RFC-5340 (4.4.3.9) during Intra-area-prefix LSA origination by DR, it should check the Neighbor’s state and interface-id, in order to copy the list of prefixes from the Link-LSA into intra-area-prefix LSA.
But there is a conflicting statement in the RFC for Intra-area-prefix LSA generation in the RFC section (4.4.3.9) and (4.9).
In 4.4.3.9 Section::
Intra-area-prefix LSA
If router 'A' has multiple interfaces on the link and router 'B' is DR for
the link, then according to RFC, prefixes in link-LSA associated with
standby interface will not be included in intra-area-prefix LSA generated by
DR 'B' for the link, because Link state ID of standby interface's Link-LSA
will not match neighbor's(A) interface ID.
Each link-LSA associated with Link L is examined (these are in the
Designated Router's interface structure for Link L). If the link-
LSA's Advertising Router is fully adjacent to the Designated
Router and the Link State ID matches the neighbor's interface ID,
the list of prefixes in the link-LSA is copied into the intra-
area-prefix-LSA that is being built.
In 4.9 Section::
Intra-area-prefix LSA generation for prefixes on standby interface
Prefixes on Standby Interfaces will be processed the same way as
prefixes on the Active Interface. For example, if the router is
the DR for the link, the Active Interface's prefixes are included
in an intra-area-prefix-LSA which is associated with the Active
Interface's network-LSA, prefixes from Standby Interfaces on the
link will also be included in that intra-area-prefix LSA.
---RFC 5340 (4.9) ---