RFC Errata
RFC 5340, "OSPF for IPv6", July 2008
Source of RFC: ospf (rtg)See Also: RFC 5340 w/ inline errata
Errata ID: 3350
Status: Verified
Type: Technical
Publication Format(s) : TEXT
Reported By: Michael Barnes
Date Reported: 2012-09-12
Verifier Name: Stewart Bryant
Date Verified: 2013-01-07
Section 2.7 says:
o Two Options bits, the "R-bit" and the "V6-bit", have been added to the Options field for processing router-LSAs during the SPF calculation (see Appendix A.2). If the "R-bit" is clear, an OSPF speaker can participate in OSPF topology distribution without being used to forward transit traffic; this can be used in multi- homed hosts that want to participate in the routing protocol. The V6-bit specializes the R-bit; if the V6-bit is clear, an OSPF speaker can participate in OSPF topology distribution without being used to forward IPv6 datagrams. If the R-bit is set and the V6-bit is clear, IPv6 datagrams are not forwarded but datagrams belonging to another protocol family may be forwarded.
It should say:
o Two Options bits, the "R-bit" and the "V6-bit", have been added to the Options field for processing router-LSAs during the SPF calculation (see Appendix A.2). If the "R-bit" is clear, an OSPF speaker can participate in OSPF topology distribution without being used to forward transit traffic; this can be used in multi- homed hosts that want to participate in the routing protocol. An Area Border Router MUST advertise a consistent R-bit setting in its self-originated router-LSAs for all attached areas. The V6-bit specializes the R-bit; if the V6-bit is clear, an OSPF speaker can participate in OSPF topology distribution without being used to forward IPv6 datagrams. If the R-bit is set and the V6-bit is clear, IPv6 datagrams are not forwarded but datagrams belonging to another protocol family may be forwarded.
Notes:
This addresses a corner case.