fun with lsa's...

the lsa  information you can find in wireshark captures is the same information you can get from a router in the network... but you knew that...

given this simple topology, r1 and r2 are area 0 ospf, while r2's f0/1 is eigrp 1 with r3... r2 redistributes...

how many different types of lsa's will be produced from this network? this is not a trick question...  there will be three types... router, network and external...

r2 is neither an abr nor an asbr... the lsa's don't lie...

R1#sh ip ospf data router

            OSPF Router with ID (1.1.1.1) (Process ID 1)

        Router Link States (Area 0)

  LS age: 783
  Options: (No TOS-capability, DC)
  LS Type: Router Links
  Link State ID: 1.1.1.1
  Advertising Router: 1.1.1.1
  LS Seq Number: 8000004D
  Checksum: 0xE6C8
  Length: 48
  Number of Links: 2

    Link connected to: a Stub Network
     (Link ID) Network/subnet number: 1.1.1.0
     (Link Data) Network Mask: 255.255.255.0
      Number of MTID metrics: 0
       TOS 0 Metrics: 1

    Link connected to: a Transit Network
     (Link ID) Designated Router address: 10.1.1.2
         
R1#sh ip ospf data netw

            OSPF Router with ID (1.1.1.1) (Process ID 1)

        Net Link States (Area 0)

  Routing Bit Set on this LSA in topology Base with MTID 0
  LS age: 1131
  Options: (No TOS-capability, DC)
  LS Type: Network Links
  Link State ID: 10.1.1.2 (address of Designated Router)
  Advertising Router: 2.2.2.2
  LS Seq Number: 80000013
  Checksum: 0x8FD
  Length: 32
  Network Mask: /24
    Attached Router: 2.2.2.2
    Attached Router: 1.1.1.1

R1#sh ip ospf data summ

            OSPF Router with ID (1.1.1.1) (Process ID 1)
R1#sh ip ospf data asbr

            OSPF Router with ID (1.1.1.1) (Process ID 1)

R1#sh ip ospf data external

            OSPF Router with ID (1.1.1.1) (Process ID 1)

        Type-5 AS External Link States

  Routing Bit Set on this LSA in topology Base with MTID 0
  LS age: 1037
  Options: (No TOS-capability, DC, Upward)
  LS Type: AS External Link
  Link State ID: 3.3.3.0 (External Network Number )
  Advertising Router: 2.2.2.2
  LS Seq Number: 80000001
  Checksum: 0x3F50
  Length: 36
  Network Mask: /24
    Metric Type: 2 (Larger than any link state path)
    MTID: 0
    Metric: 20
    Forward Address: 0.0.0.0
    External Route Tag: 0

  Routing Bit Set on this LSA in topology Base with MTID 0
  LS age: 1037
  Options: (No TOS-capability, DC, Upward)
  LS Type: AS External Link
  Link State ID: 192.168.1.0 (External Network Number )
  Advertising Router: 2.2.2.2
  LS Seq Number: 80000001
  Checksum: 0xEE3F
  Length: 36
  Network Mask: /24
    Metric Type: 2 (Larger than any link state path)
    MTID: 0
    Metric: 20
    Forward Address: 0.0.0.0
    External Route Tag: 0

note the output for summary and asbr above show only a router id...

R1#sh ip ospf data ?
  adv-router        Advertising Router link states
  asbr-summary      ASBR summary link states
  database-summary  Summary of database
  external          External link states
  internal          Internal LSA information
  multicast         Multicast Topology
  network           Network link states
  nssa-external     NSSA External link states
  opaque-area       Opaque Area link states
  opaque-as         Opaque AS link states
  opaque-link       Opaque Link-Local link states
  router            Router link states
  self-originate    Self-originated link states
  summary           Network summary link states
  topology          Unicast Topology
  |                 Output modifiers

1 router
2 network
3 summary
4 asbr summary
5 external
7 nssa