Operation Manual – IPv4 Routing
H3C S3610&S5510 Series Ethernet Switches
Chapter 3 OSPF Configuration
3-18
Figure 3-17
Network LSA format
Major fields:
z
Link State ID: The interface address of the DR
z
Network Mask: The mask of the network (a broadcast or NBMA network)
z
Attached Router: The IDs of the routers, which are adjacent to the DR, including
the DR itself
3) Summary
LSA
Network summary LSAs (Type-3 LSAs) and ASBR summary LSAs (Type-4 LSAs) are
originated by ABRs. Other than the difference in the Link State ID field, the format of
type 3 and 4 summary-LSAs is identical.
Figure 3-18
Summary LSA format
Major fields:
z
Link State ID: For a Type-3 LSA, it is an IP address outside the area; for a type 4
LSA, it is the router ID of an ASBR outside the area.
z
Network Mask: The network mask for the type 3 LSA; set to 0.0.0.0 for the Type-4
LSA
z
metric: The metric to the destination
