H3C Technologies H3C WX6000 Series Access Controllers - Manual (Page 250)

25-16
Figure 25-17 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 25-18 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