IP.PROTOCOL=89
报文格式
OSPF Header
Version number：OSPF v2 for IPv4：2；OSPF v3 for IPv6；
Router ID：表示生成此报文的路由器的 Router ID；
Area ID：表示此报文需要被通告到的区域；
Type：类型字段。即 Data 部分的类型，即不同的 OSPF 报文类型；
Packet length：表示整个OSPF报文的长度，单位是字节；
Checksum：校验字段，其校验的范围是整个 OSPF 报文，包括 OSPF 报文头部；
Auth Type：0，表示不认证；1，表示简单的明文密码认证；2，表示加密（MD5）认证；
Authentication：认证所需的信息。该字段的内容随AuType的值不同而不同；
OSPF Payload
LSR, Link State Request
- 解释：OSPF_Header.Type = 3，向对方请求所需要的 LSA 数据（只有当 DD 报文交换成功后，才会向双方发送 LSR 报文）
LSAck, Link State Acknowledgment
- 解释：OSPF_Header.Type = 5，确认已经收到对方的 LSA 报文。
报文示例
IP.OSPFHeader.Type == 1 | Hello
Frame 125: 82 bytes on wire (656 bits), 82 bytes captured (656 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:02:01:00 (38:39:cc:02:01:00), Dst: IPv4mcast_05 (01:00:5e:00:00:05)
Internet Protocol Version 4, Src: 10.0.12.2, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
Version: 2
Message Type: Hello Packet (1)
Packet Length: 48
Source OSPF Router: 2.2.2.2
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xca91 [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
OSPF Hello Packet
Network Mask: 255.255.255.0
Hello Interval [sec]: 10
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
Router Priority: 1
Router Dead Interval [sec]: 40
Designated Router: 10.0.12.1
Backup Designated Router: 10.0.12.2
Active Neighbor: 1.1.1.1
IP.OSPFHeader.Type == 2 | DD
Frame 163: 66 bytes on wire (528 bits), 66 bytes captured (528 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:02:01:00 (38:39:cc:02:01:00), Dst: 38:39:cc:01:01:00 (38:39:cc:01:01:00)
Internet Protocol Version 4, Src: 10.0.12.2, Dst: 10.0.12.1
Open Shortest Path First
OSPF Header
Version: 2
Message Type: DB Description (2)
Packet Length: 32
Source OSPF Router: 2.2.2.2
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xaf6e [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
OSPF DB Description
Interface MTU: 0
Options: 0x42, (O) Opaque, (E) External Routing
0... .... = DN: Not set
.1.. .... = (O) Opaque: Set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
DB Description: 0x07, (I) Init, (M) More, (MS) Master
.... 0... = (R) OOBResync: Not set
.... .1.. = (I) Init: Set
.... ..1. = (M) More: Set
.... ...1 = (MS) Master: Yes
DD Sequence: 2148
IP.OSPFHeader.Type == 4 | LSU
Internet Protocol Version 4, Src: 10.0.12.1, Dst: 224.0.0.6
Open Shortest Path First
OSPF Header
LS Update Packet
Number of LSAs: 2
LSA-type 1 (Router-LSA), len 36
LSA-type 2 (Network-LSA), len 36
.000 0000 0000 0001 = LS Age (seconds): 1
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = O: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Network-LSA (2)
Link State ID: 10.0.12.3
Advertising Router: 3.3.3.3
Sequence Number: 0x80000002
Checksum: 0xa966
Length: 36
Netmask: 255.255.255.0
Attached Router: 3.3.3.3
Attached Router: 1.1.1.1
Attached Router: 4.4.4.4
Frame 416: 254 bytes on wire (2032 bits), 254 bytes captured (2032 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:02:01:00 (38:39:cc:02:01:00), Dst: IPv4mcast_05 (01:00:5e:00:00:05)
Internet Protocol Version 4, Src: 10.0.12.2, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
Version: 2
Message Type: LS Update (4)
Packet Length: 220
Source OSPF Router: 2.2.2.2
Area ID: 0.0.0.0 (Backbone)
Checksum: 0x30d8 [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LS Update Packet
Number of LSAs: 4
LSA-type 10 (Opaque LSA, Area-local scope), len 52
.000 0000 0000 0010 = LS Age (seconds): 2
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Link Opaque LSA (8)
Link State ID Opaque ID: 1
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0xb1ed
Length: 52
OSPFv2 Extended Link Opaque LSA
OSPFv2 Extended Link TLV (Type: Transit ID: 10.0.34.3 Data: 10.0.34.3)
TLV Type: OSPFv2 Extended Link (1)
TLV Length: 28
Link Type: 2 - Connection to a transit network
Reserved: 000000
Link ID: 10.0.34.3
Link Data: 10.0.34.3
LAN Adj-SID Sub-TLV (SID/Label: 48081, Neighbor: 4.4.4.4)
TLV Type: LAN Adj-SID (3)
TLV Length: 11
Flags: 0x60, (V) Value/Index Flag, (L) Local/Global Flag
0... .... = (B) Backup Flag: Not set
.1.. .... = (V) Value/Index Flag: Set
..1. .... = (L) Local/Global Flag: Set
...0 .... = (G) Group Flag: Not set
.... 0... = (P) Persistent Flag: Not set
Reserved: 00
Multi-Topology ID: 0
Weight: 0
Neighbor ID: 4.4.4.4
SID/Label: 48081
LSA-type 10 (Opaque LSA, Area-local scope), len 52
.000 0000 0000 0010 = LS Age (seconds): 2
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Link Opaque LSA (8)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0x6a55
Length: 52
OSPFv2 Extended Link Opaque LSA
OSPFv2 Extended Link TLV (Type: Transit ID: 10.0.23.3 Data: 10.0.23.3)
TLV Type: OSPFv2 Extended Link (1)
TLV Length: 28
Link Type: 2 - Connection to a transit network
Reserved: 000000
Link ID: 10.0.23.3
Link Data: 10.0.23.3
LAN Adj-SID Sub-TLV (SID/Label: 48080, Neighbor: 2.2.2.2)
TLV Type: LAN Adj-SID (3)
TLV Length: 11
Flags: 0x60, (V) Value/Index Flag, (L) Local/Global Flag
0... .... = (B) Backup Flag: Not set
.1.. .... = (V) Value/Index Flag: Set
..1. .... = (L) Local/Global Flag: Set
...0 .... = (G) Group Flag: Not set
.... 0... = (P) Persistent Flag: Not set
Reserved: 00
Multi-Topology ID: 0
Weight: 0
Neighbor ID: 2.2.2.2
SID/Label: 48080
LSA-type 10 (Opaque LSA, Area-local scope), len 44
.000 0000 0000 0010 = LS Age (seconds): 2
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Prefix Opaque LSA (7)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0x1093
Length: 44
OSPFv2 Extended Prefix Opaque LSA
OSPFv2 Extended Prefix TLV (Type: Intra-Area Prefix: 3.3.3.3/32)
TLV Type: OSPFv2 Extended Prefix (1)
TLV Length: 20
Route Type: Intra-Area (1)
PrefixLength: 32
Address Family: IPv4 Unicast (0)
Flags: 0x40, (N) Node Flag
0... .... = (A) Attach Flag: Not set
.1.. .... = (N) Node Flag: Set
Address Prefix: 3.3.3.3
Prefix SID Sub-TLV (SID/Label: 3)
TLV Type: Prefix SID (2)
TLV Length: 8
Flags: 0x00
.0.. .... = (NP) No-PHP Flag: Not set
..0. .... = (M) Mapping Server Flag: Not set
...0 .... = (E) Explicit-Null Flag: Not set
.... 0... = (V) Value/Index Flag: Not set
.... .0.. = (L) Local/Global Flag: Not set
Reserved: 00
Multi-Topology ID: 0
SR-Algorithm: Shortest Path First (0)
SID/Label: 3
LSA-type 10 (Opaque LSA, Area-local scope), len 44
.000 0000 0000 0010 = LS Age (seconds): 2
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: Router Information (RI) (4)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0xc138
Length: 44
Opaque Router Information LSA
SR-Algorithm
TLV Type: SR-Algorithm (8)
TLV Length: 1
SR-Algorithm: Shortest Path First (0)
SID/Label Range (Range Size: 1001)
TLV Type: SID/Label Range (9)
TLV Length: 12
Range Size: 1001
Reserved: 00
SID/Label Sub-TLV (SID/Label: 36000)
TLV Type: SID/Label (1)
TLV Length: 3
SID/Label: 36000
接口开启 MPLS TE 特性，设备主动发送的报文：
Frame 470: 194 bytes on wire (1552 bits), 194 bytes captured (1552 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:01:01:00 (38:39:cc:01:01:00), Dst: IPv4mcast_05 (01:00:5e:00:00:05)
Internet Protocol Version 4, Src: 10.0.12.1, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
Version: 2
Message Type: LS Update (4)
Packet Length: 160
Source OSPF Router: 1.1.1.1
Area ID: 0.0.0.0 (Backbone)
Checksum: 0x2b28 [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LS Update Packet
Number of LSAs: 1
LSA-type 10 (Opaque LSA, Area-local scope), len 132
.000 0000 0000 0001 = LS Age (seconds): 1
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: Traffic Engineering LSA (1)
Link State ID TE-LSA Reserved: 0
Link State ID TE-LSA Instance: 1
Advertising Router: 1.1.1.1
Sequence Number: 0x80000001
Checksum: 0x945a
Length: 132
MPLS Traffic Engineering LSA
Link Information
TLV Type: 2 - Link Information
TLV Length: 108
Link Type: 2 - Multi-access
TLV Type: 1: Link Type
TLV Length: 1
MPLS/TE Link Type: Multi-access (2)
Link ID: 10.0.12.2
TLV Type: 2: Link ID
TLV Length: 4
MPLS/TE Link ID: 10.0.12.2
Local Interface IP Address: 10.0.12.1
TLV Type: 3: Local Interface IP Address
TLV Length: 4
MPLS/TE Local Interface Address: 10.0.12.1
Remote Interface IP Address: 0.0.0.0
TLV Type: 4: Remote Interface IP Address
TLV Length: 4
MPLS/TE Remote Interface Address: 0.0.0.0
Traffic Engineering Metric: 1
TLV Type: 5: Traffic Engineering Metric
TLV Length: 4
Traffic Engineering Metric: 1
Maximum Bandwidth: 12500000 bytes/s (100000000 bits/s)
TLV Type: 6: Maximum Bandwidth
TLV Length: 4
Maximum Bandwidth: 12500000 bytes/s (100000000 bits/s)
Maximum Reservable Bandwidth: 0 bytes/s (0 bits/s)
TLV Type: 7: Maximum Reservable Bandwidth
TLV Length: 4
Maximum Reservable Bandwidth: 0 bytes/s (0 bits/s)
Unreserved Bandwidth
TLV Type: 8: Unreserved Bandwidth
TLV Length: 32
Pri (or TE-Class) 0: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 1: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 2: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 3: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 4: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 5: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 6: 0 bytes/s (0 bits/s)
Pri (or TE-Class) 7: 0 bytes/s (0 bits/s)
Resource Class/Color: 0x00000000
TLV Type: 9: Resource Class/Color
TLV Length: 4
MPLS/TE Link Resource Class/Color: 0x00000000
Unknown Link sub-TLV: 32770 (For Experimental Use)
TLV Type: 32770: Unknown sub-TLV (For Experimental Use)
TLV Length: 4
TLV Value: 00000001
IP.OSPFHeader.Type == 5 | LSACK
Frame 417: 138 bytes on wire (1104 bits), 138 bytes captured (1104 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:01:01:00 (38:39:cc:01:01:00), Dst: IPv4mcast_05 (01:00:5e:00:00:05)
Internet Protocol Version 4, Src: 10.0.12.1, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
Version: 2
Message Type: LS Acknowledge (5)
Packet Length: 104
Source OSPF Router: 1.1.1.1
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xd16e [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LSA-type 10 (Opaque LSA, Area-local scope), len 44
.000 0000 0000 0011 = LS Age (seconds): 3
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: Router Information (RI) (4)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0xc138
Length: 44
LSA-type 10 (Opaque LSA, Area-local scope), len 44
.000 0000 0000 0011 = LS Age (seconds): 3
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Prefix Opaque LSA (7)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0x1093
Length: 44
LSA-type 10 (Opaque LSA, Area-local scope), len 52
.000 0000 0000 0011 = LS Age (seconds): 3
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Link Opaque LSA (8)
Link State ID Opaque ID: 0
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0x6a55
Length: 52
LSA-type 10 (Opaque LSA, Area-local scope), len 52
.000 0000 0000 0011 = LS Age (seconds): 3
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: OSPFv2 Extended Link Opaque LSA (8)
Link State ID Opaque ID: 1
Advertising Router: 3.3.3.3
Sequence Number: 0x80000001
Checksum: 0xb1ed
Length: 52
接口开启 MPLS TE 特性，针对 LSU 的 LSACK 报文：
Frame 471: 78 bytes on wire (624 bits), 78 bytes captured (624 bits) on interface -, id 0
Ethernet II, Src: 38:39:cc:03:01:00 (38:39:cc:03:01:00), Dst: IPv4mcast_05 (01:00:5e:00:00:05)
Internet Protocol Version 4, Src: 10.0.12.2, Dst: 224.0.0.5
Open Shortest Path First
OSPF Header
Version: 2
Message Type: LS Acknowledge (5)
Packet Length: 44
Source OSPF Router: 2.2.2.2
Area ID: 0.0.0.0 (Backbone)
Checksum: 0xdfdc [correct]
Auth Type: Null (0)
Auth Data (none): 0000000000000000
LSA-type 10 (Opaque LSA, Area-local scope), len 132
.000 0000 0000 0001 = LS Age (seconds): 1
0... .... .... .... = Do Not Age Flag: 0
Options: 0x02, (E) External Routing
0... .... = DN: Not set
.0.. .... = (O) Opaque: Not set
..0. .... = (DC) Demand Circuits: Not supported
...0 .... = (L) LLS Data block: Not Present
.... 0... = (N) NSSA: Not supported
.... .0.. = (MC) Multicast: Not capable
.... ..1. = (E) External Routing: Capable
.... ...0 = (MT) Multi-Topology Routing: No
LS Type: Opaque LSA, Area-local scope (10)
Link State ID Opaque Type: Traffic Engineering LSA (1)
Link State ID TE-LSA Reserved: 0
Link State ID TE-LSA Instance: 1
Advertising Router: 1.1.1.1
Sequence Number: 0x80000001
Checksum: 0x945a
Length: 132