Editing Open Shortest Path First (section)

=== Packet format changes ===
* OSPF version number changed to 3
* From the LSA header, the options field has been removed.
* In hello packets and database description, the options field is changed from 16 to 24 bits.
* In hello packet, the address information has been removed. The interface ID has been added.
* In router-LSAs, two options bits, the ''R-bit'' and the ''V6-bit'', have been added.
** ''R-bit'': allows for multi-homed hosts to participate in the routing protocol.
** ''V6-bit'': specializes the R-bit. 
* Add ''instance ID'', which allows multiple OSPF protocol instances on the same logical interface.