IP header
|
Ospf packet header
|
Number LAS s
|
LSA header
|
lsa Data
|
Version(8)
|
Type(8)
|
Packet length(16)
|
Router-id(32)
|
||
Area-id(32)
|
||
Checksum(16)
|
Autype(24)
|
|
Authentication(32)
|
||
Authentication(32)
|
Version(8)
|
1
|
Packet length(16)
|
Router-id(32)
|
||
Area-id(32)
|
||
Checksum(16)
|
Autype(24)
|
|
Authentication(32)
|
||
Authentication(32)
|
||
Network mask(32)
|
||
Hellointerval
(16) options (8) RTR pri
|
||
Routerdeadtimeinterval(32)
|
||
DR(32)
|
||
BDR(32)
|
||
Neighbor (32)
|
||
--------
|
Version(8)
|
2
|
Packet length(16)
|
||
Router-id(32)
|
||||
Area-id(32)
|
||||
Checksum(16)
|
Autype(24)
|
|||
Authentication(32)
|
||||
Authentication(32)
|
||||
Interface MTU
|
option
|
i=1
M=1 ms=1
|
||
DD Sequence number
|
||||
LSA header
|
Version(8)
|
3
|
Packet length(16)
|
Router-id(32)
|
||
Area-id(32)
|
||
Checksum(16)
|
Autype(24)
|
|
Authentication(32)
|
||
Authentication(32)
|
||
LS TYPE
|
||
Link state ID
|
||
Advertising router
|
Version(8)
|
4
|
Packet length(16)
|
Router-id(32)
|
||
Area-id(32)
|
||
Checksum(16)
|
Autype(24)
|
|
Authentication(32)
|
||
Authentication(32)
|
||
Number of LSAs
|
||
LSAs
|
Version(8)
|
Type(8)
|
Packet length(16)
|
Router-id(32)
|
||
Area-id(32)
|
||
Checksum(16)
|
Autype(24)
|
|
Authentication(32)
|
||
Authentication(32)
|
||
LSA header
|
LS age
|
Options
|
LS type
|
Linke state ID
|
||
Adbertising router
|
||
LS sequence number
|
||
Ls checksum
|
length
|
LS age
|
Options
|
1
|
|||||
Linke state ID
|
|||||||
Adbertising router
|
|||||||
LS sequence number
|
|||||||
Ls checksum
|
length
|
||||||
0
|
V
|
E
|
B
|
0
|
#links
|
||
Link id
|
|
||||||
Type
|
Tos
|
metric
|
|||||
|
|
||||||
TOS
|
0
|
TOS metric
|
|||||
Link ID
|
|
||||||
Link data
|
|
LS age
|
Options
|
2
|
Linke state ID
|
||
Adbertising router
|
||
LS sequence number
|
||
Ls checksum
|
length
|
|
Network mask
|
||
Attached router
|
LS age
|
Options
|
3 or 4
|
|
Linke state ID
|
|||
Adbertising router
|
|||
LS sequence number
|
|||
Ls checksum
|
length
|
||
Network mask
|
|||
0
|
metric
|
||
Tos
|
tos metric
|
LS age
|
Options
|
3 or 4
|
|||
Linke state ID
|
|||||
Adbertising router
|
|||||
LS sequence number
|
|||||
Ls checksum
|
Length
|
||||
Network mask
|
|||||
E
|
0
|
metric
|
|||
Forwarding address
|
|||||
External route lag
|
|||||
E
|
tos
|
tos metric
|
|||
Forwarding address
|
|||||
External route lag
|
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