RFC 2328, "OSPF Version 2", April 1998

Note: This RFC has been updated by RFC 5709, RFC 6549, RFC 6845, RFC 6860, RFC 7474, RFC 8042, RFC 9355, RFC 9454

Errata ID: 7850
Status: Reported
Type: Technical
Publication Format(s) : TEXT
Reported By: Alfred Lindem
Date Reported: 2024-03-15

Section 10.7/A.3.5 says:

Section 10.7

        Each LSA specified in the Link State Request packet should be
        located in the router's database, and copied into Link State
        Update packets for transmission to the neighbor.  These LSAs
        should NOT be placed on the Link state retransmission list for
        the neighbor.  If an LSA cannot be found in the database,
        something has gone wrong with the Database Exchange process, and
        neighbor event BadLSReq should be generated.
 
Section A.3.5 

    Link State Update packets are multicast on those physical networks
    that support multicast/broadcast.  In order to make the flooding
    procedure reliable, flooded LSAs are acknowledged in Link State
    Acknowledgment packets.  If retransmission of certain LSAs is
    necessary, the retransmitted LSAs are always sent directly to the
    neighbor.  For more information on the reliable flooding of LSAs,
    consult Section 13.

It should say:

Section 10.7
        
        Each LSA specified in the Link State Request packet should be
        located in the router's database, and copied into Link State
        Update packets for transmission directly to the neighbor, 
        i.e., unicast on all interface types except point-to-point
        interfaces where all OSPF packets are sent to the address
        AllSPFRouters.  These LSAs should NOT be placed on the Link
        state retransmission list for the neighbor.  If an LSA cannot
        be found in the database, something has gone wrong with the
        Database Exchange process, and neighbor event BadLSReq should
        be generated.

Section A.3.5 
    
    Link State Update packets are multicast on those physical networks
    that support multicast/broadcast.  In order to make the flooding
    procedure reliable, flooded LSAs are acknowledged in Link State
    Acknowledgment packets.  If retransmission of certain LSAs is
    necessary, the retransmitted LSAs are always sent directly to the
    neighbor.  For more information on the reliable flooding of LSAs,
    consult Section 13. Link State Update packets are also sent
    directly to the neighbor in response to Link State Request
    packets as specified in Section 10.7.
   

Notes:

Clarify that OSPF Link State Updates sent in response to OSPF Link Requests should be unicast.

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