Link State Type (4 bytes)
Protocol : OSPF OSPF PCI
OSPF Type: Type 3 / Link State Request
Field    : link state type
Length   : 4 bytes
Contents : link state type indication.

1 Router links
2 Network links
3 Summary link (IP network)
4 Summary link (ASBR)
5 AS external link

Link State ID (4 bytes)
Protocol : OSPF OSPF PCI
OSPF Type: Type 3 / Link State Request
Field    : link state ID
Length   : 4 bytes
Contents : Link-State-Kennung.

Advertising Router (4 bytes)
Protocol : OSPF OSPF PCI
OSPF Type: Type 3 / Link State Request
Field    : advertising router
Length   : 4 bytes
Contents : address of the advertising router.