1. OSPF 2013 3

2. OSPF LSA LSDB SPF 2 3. IP --------- --------- IP 3 4. [Quidway]disip routing-tableRouting Tables:Destination/Mask proto pref Metric Nexthop Interface 0.0.0.0/0 Static 60 0 120.0.0.2 Serial0 8.0.0.0/8RIP 100 3120.0.0.2 Serial0 9.0.0.0/8 OSPF 10 5020.0.0.2 Ethernet0 9.1.0.0/16 RIP100 4120.0.0.2 Serial011.0.0.0/8 Static 600120.0.0.2 Serial020.0.0.0/8 Direct 0 0 20.0.0.1 Ethernet020.0.0.1/32Direct 0 0127.0.0.1 LoopBack0 ...... 4 5. IP 9.1.1.2 [Router]display ip routing-table Destination/Mask protopref Metric NexthopInterface 0.0.0.0/0Static 60 0 120.0.0.2Serial0 8.0.0.0/8RIP1003 120.0.0.2Serial0 9.0.0.0/8OSPF 105020.0.0.2 Ethernet09.1.0.0/16RIP1004 120.0.0.2Serial011.0.0.0/8Static600 120.0.0.2Serial020.0.0.0/8Direct00 20.0.0.1Ethernet020.0.0.1/32 Direct00127.0.0.1 LoopBack0 : IP 5 6. static route dynamic route 6 7. [Quidway] ip route-static IP-address mask nexthop-address[A] ip route-static 202.112.130.0 255.255.255.0 10.0.1.2 E0E110.0.1.1/8 10.0.1.2/8A B 202.112.138.0/24 202.112.130.0/24202.112.130.0 10.0.1.2 A 7 8. 129.1.0.0/1 6 Quidway Quidway B A 129.0.0.1 E0 129.0.0.2 Quidway A [QuidwayA]ip route-static 129.1.0.0 255.255.0.0 129.0.0.28 9. default route 0.0.0.0/0 [Quidway] ip route-static IP-address mask nexthop-address [Quidway] ip route-static 0.0.0.0 0.0.0.0 nexthop-address [Quidway] ip route-static 0.0.0.0 0 nexthop-address9 10. 129.1.0.0/1 6 Quidway QuidwayBE InternetA 129.0.0.10 129.0.0.2 Quidway B [QuidwayB]ip route-static 0.0.0.0 0.0.0.0 129.0.0.1 10 11. RIP BGP OSPF IS-IS RIP OSPF IS-IS EGP BGP 11 12. A BS1 S0 S0 S1 A B 12 13. 13 14. 14 15. 15 16. 16 17. 17 18. 18 19. RIP RIP 100 15 19 20. OSPF 20 21. 1 1 LSDBA B RTA RTB LSA RTA 2 5 2 5 C LSA RTB RTC 3 3 LSA RTC D LSA RTD RTD ( 1 1 1 1 A B ABA B A B 2 2 2 2 C C C C 3 3 3 3 D D D D 21 22. OSPF 22 23. OSPF OSPF OSPF DR DR OSPF 23 24. : 24 25. OSPF OSPF OSPF DR DR OSPF 25 26. LOOP1:1.1.1.1/24R ID:2.2.2.2R1R2E0:168.1.1.1/24 E0:168.1.1.2/24E0:168.1.RID:1.1.1.1HUB LOOP1:2.2.2.2/24PCA PCB PCCPCD 26 27. OSPF 27 28. OSPF Hello DR BDR DD LSDB LSR LSALSU LSALSAck 28 29. OSPF 29 30. OSPF OSPF OSPF Packet Number of IP HeaderLSA Header LSA Data HeaderLSAs OSPF 0 7 15 31Version Type Packet length Router IDArea ID Checksum AuType Authentication 30 31. OSPF OSPF IP 89 IP OSPF OSPF OSPF IP TTL 1 ( ) IP header: (89) ospf packet31 32. OSPF Router ID 32-bit (Loopback) IP ID IP ID Router ID OSPF Router ID 32 33. Hello Hello Packet network mask 33 34. DD Database DescriptionPacket 34 35. LSR Link State RequestPacket 35 36. LSU Link State UpdatePacket 36 37. LSAck Link State AcknowledgmentPacket 37 38. LSA LSA 20 LSA 0 7 1531LS age OptionsLS type Link State IDAdvertising Router LS sequence numberLS checksumlength 38 39. 5 RIP OSPF 5 39 40. OSPF OSPF OSPF DR DR OSPF 40 41. OSPF :Broadcast Stub: NBMAFR/X.25Point-to-MultipointStubPoint-to-PointEthernet NBMA Ethernet PPP NBMA 41 42. S0 172.30.62.53/30Point-to-Point S0 172.30.62.54/30E0 218.249.220.65/24 Broadcast VLAN1 218.249.220.66/24 VLAN 2VLAN n 192.168.1.1/24Stub Stub 192.168.n.1/24 Hub1 n 42 43. LSA rid:3.3.3.3rid:4.4.4.4RTF RTE rid:6.6.6.6 40.0.0.240.0.0.3 Frame Relay RTC 30.0.0.3rid:1.1.1.1 RTA 10.0.0.1X.2510.0.0.0 rid:5.5.5.530.0.0.1 Ethernet RTD20.0.0.1 30.0.0.2 ppp 20.0.0.2 RTBrid:2.2.2.2 43 44. LSA Is age: 4 /* LSA */ Type : Router /*LSA */ Is id: 1.1.1.1 /*LSA */ adv rtr: 1.1.1.1 /* LSA */ seq#: 80000001 /*LSA */ len 108/*LSA */ cksum: 0x3543 /* */ Link count 9 /* LSA */ ID ID 00000VEB 044 45. STUB link id: 10.0.0.0 /* */data : 255.255.255.0 /* */type : StubNet (3) /* */metric : 50/* */45 46. PPP link id: 20.0.0.0 /* */data : 255.0.0.0/* */type : StubNet (3)/* */metric : 5/* */ RTB link id: 2.2.2.2 /*RTB router id*/data : 20.0.0.2/*RTB */type : Router (1)/* */metric : 5 /* */ 46 47. Frame Relay link id: 40.0.0.1/* */ data : 255.255.255.255 /* */ type : StubNet (3) /* */ metric : 5 /* */ link id: 4.4.4.4/* RTE router id */link id: 3.3.3.3 /* RTF router id */data : 40.0.0.1 /* RTE data : 40.0.0.1 /* RTF */ */type : Router (1) /* */ type : Router (1) /* */metric : 5/* */ metric : 5/* */ 47 48. /NBMA link id: 30.0.0.0 /* */ data : 255.255.255.0/* */ type : TransNet (2) /* */ metric : 50/* */ link id: 5.5.5.5 /* RTE router id */link id: 6.6.6.6 /* RTF router id */data : 30.0.0.1 /* RTE data : 30.0.0.1/* RTF */ */type : Router (1) /* */type : Router (1) /* */metric : 5 /* */ metric : 5/* */ 48 49. OSPF OSPF SPF hello DD 49 50. OSPF /NBMA DR BDR 50 51. OSPF OSPF OSPF DR DR OSPF 51 52. FR/X.25 X.25Ethernet PPP52 53. NBMA NBMA: : DR DRFrame-Relay X.25 Frame-Relay X.25 53 54. /NBMA link id: 30.0.0.0 /* */ data : 255.255.255.0/* */ type : TransNet (2) /* */ metric : 50/* */ link id: 5.5.5.5 /* RTE router id */link id: 6.6.6.6 /* RTF router id */data : 30.0.0.1 /* RTE data : 30.0.0.1/* RTF */ */type : Router (1) /* */type : Router (1) /* */metric : 5 /* */ metric : 5/* */ 54 55. :(DR BDR DROther point-to-point) DR BDR M= n(n-1)/2M= (n-2)2+1= 28 = 13 55 56. DRDRBDRM= n(n-1)/2M= (n-2)2+1 = 28 = 131 OSPF 2 Priority>0 1 3 DR 2 4 56 57. 57 58. DR DR OSPF OSPF DR Priority>0 OSPF Priority 1 Priority>0 OSPF DR Priority Priority Router ID DR Hello DR Hello DR 58 59. DR DR Priority DR Priority DR BDR DR BDR DR DR DR DR BDR BDR DR BDR DR BDR DR 59 60. /NBMA link id: 30.0.0.3/* DR */ data : 30.0.0.1 /* */ type : TransNet (2)/* */ metric : 50/* */ LSA(Router) /*DR(6.6.6.6) LSA */ LSA(Network) Netmask: 255.255.255.0 Attached 30.0.0.1 router Attached: 30.0.0.2 router/* router id*/60 61. LSA LSDB DR Loop1: 6.6.6.6/24 Loop1: 5.5.5.5/24 S2 S1Loop1: 1.1.1.1/24RID:6.6.6.6 Loop1: 2.2.2.2/24 RID:5.5.5.5E0/1R1 R2 Vlan2:168.1.1.4/24RID:2.2.2.2 RID:3.3.3.3 E0/1Vlan2:168.1.1.3/24 E0:168.1.1.1/24 E0:168.1.1.2/24 HUB PCA PCB PCC PCD 61 62. OSPF OSPF OSPF DR DR OSPF 62 63. OSPF Attempt 2-Way DownInit NBMA Down HELLO Dead-Interval HELLO NBMA Router HelloHELLO ID HELLO DROther Attempt Init Loading2-wayExStart ExchangeExStart DD Loading ExchangeFull Full LSR LSDB DD LSDB LSU LSA / / DD 63 64. OSPF Down Dead-Interval Hello Attempt NBMA HELLO Init HELLO Router ID HELLO 2-Way HELLO 64 65. OSPF ExStart DD / / DD Exchange LSDB DD Loading LSR LSU Full65 66. RT1RT 2 DownHello( DR = 0.0.0.0,Neighbors Seen = 0)Down Hello( DR = RT2,Neighbors Seen = RT1) Init ExStartDD (Seq = x,I = 1, M = 1, MS = 1)DD (Seq = y,I = 1, M = 1, MS = 1) ExStartExchangeDD (Seq = y,I = 0, M = 1, MS = 0) DD (Seq = y+1,I = 0, M = 1, MS = 1) ExchangeDD (Seq = y+1,I = 0, M = 1, MS = 0) DD (Seq = y+n,I = 0, M = 0, MS = 1) Loading DD (Seq = y+n,I = 0, M = 0, MS = 0)LS Request FullLS UpdateFull LS Ack 66 67. LSA LSDB Loop1: 6.6.6.6/24 Loop1: 5.5.5.5/24 S2 S1Loop1: 1.1.1.1/24RID:6.6.6.6 Loop1: 2.2.2.2/24 RID:5.5.5.5E0/1R1 R2 Vlan2:168.1.1.4/24RID:2.2.2.2 RID:3.3.3.3 E0/1Vlan2:168.1.1.3/24 E0:168.1.1.1/24 E0:168.1.1.2/24 HUB PCA PCB PCC PCD 67 68. debug debug debugging ospf eventterminal debuggingreset ospf all HUB 68 69. OSPF LSA LSDB SPF 69 70. LSA LSDB LSA 70 71. LSA LSDB P52 Loop1:5.5.5.5/24R1 S0:10.1.1.2/24 Area1R2S0:10.1.1.1/24 E0:192.168.1.2/24 E0:20.1.1.1/24 RID:1.1.1.1 RID:2.2.2.2Loop1:6.6.6.6/24 Vlan2:192.168.1.1/24 Area0 E0/1Vlan5:20.1.1.2/24 E0/1Loop1:4.4.4.4/24 S1S2RID:3.3.3.3 18 71 72. Area0Area1 Area372 73. 1 LSDB 2 LSDB SPF CPU 3 LSDB 1 LSA 2 OSPF / 0 32 ABR (Type3LSA) 73 74. : IAR(Interal Area Router) LSA LSDB ABR(Area Border Router) LSA LSDB LSA ASBR(AS Boundery Router) AS LSA BBR(BackBone Router) 74 75. ABR area0 ABRE1:100.0.3.1 E1:100.0.4.1 E0:100.0.2.2 E0:100.0.3.2RB:2.2.2.2RC:3.3.3.3 E0:100.0.4.2 IARE0:100.0.2.1 Loop0:100.0.5.1ASBRE1:100.0.6.1RA:1.1.1.1 RD:4.4.4.4Loop0:100.0.1.1 area2 area1E0:100.0.6.2RE 75 76. LSA LSDB LSA 76 77. LSA Router-LSA 1 Network-LSA 2 DR Net-Summary-LSA 3 ABR Asbr-Summary-LSA 4 ABR ASBR AS-External-LSA 5 ASBR AS AS77 78. 3 LSA Summary LSA:Summary LSA:AdvRID:2.2.2.2AdvRID:3.3.3.3LinkID:100.0.5.0LinkID:100.0.5.0area0E1:100.0.3.1 E1:100.0.4.1E0:100.0.2.2 Router LSA: E0:100.0.3.2AdvRID:4.4.4.4 RB:2.2.2.2 RC:3.3.3.3 LinkID:100.0.5.0 E0:100.0.4.2 E0:100.0.2.1Loop0:100.0.5.1E1:100.0.6.1RA:1.1.1.1 RD:4.4.4.4Loop0:100.0.1.1 area2area1 E0:100.0.6.2RE78 79. 3 LSA Summary LSA: Summary LSA: AdvRID:2.2.2.2 AdvRID:3.3.3.3 LinkID:100.0.5.0 LinkID:100.0.5.0 area0 E1:100.0.3.1 E1:100.0.4.1 E0:100.0.2.2Router LSA:E0:100.0.3.2AdvRID:4.4.4.4RB:2.2.2.2 RC:3.3.3.3 LinkID:100.0.5.0 E0:100.0.4.2E0:100.0.2.1Loop0:100.0.5.1 E1:100.0.6.1RA:1.1.1.1RD:4.4.4.4Loop0:100.0.1.1area3area2 area1E0:100.0.6.2 RF RE:6.6.6.6 Summary LSA:5.5.5.5 AdvRID:5.5.5.5Summary LSA: AdvRID:6.6.6.6 LinkID:100.0.5.0 LinkID:100.0.5.079 80. RTARTBVirtual Link Area 0 Area 12Area 19Type3 LSA D-V 0. ABR LSA 80 81. 5 LSA 5 ASE LSA:5 ASE LSA: AdvRID:4.4.4.4AdvRID:4.4.4.4 LinkID:100.0.6.0LinkID:100.0.6.0area0E1:100.0.3.1 E1:100.0.4.1E0:100.0.2.25 ASE LSA: E0:100.0.3.2 AdvRID:4.4.4.4 RB:2.2.2.2area2 LinkID:100.0.6.0RC:3.3.3.3area1E0:100.0.4.2 E0:100.0.2.1L0:100.0.6.1RA:1.1.1.1 RD:4.4.4.4Loop0:100.0.1.1E0:100.0.6.2RE 81 82. 4 LSA 4 ASB LSA: 4 ASB LSA: AdvRID:2.2.2.2 AdvRID:3.3.3.3LinkID:4.4.4.4 LinkID:4.4.4.4 area0 E1:100.0.3.1E1:100.0.4.1E0:100.0.2.2E0:100.0.3.2 RB:2.2.2.2RC:3.3.3.3E0:100.0.4.2 E0:100.0.2.1 L0:100.0.6.1RA:1.1.1.1 RD:4.4.4.4Loop0:100.0.1.1area2area1E0:100.0.6.2 RE 82 83. AS 4 ASB LSA: 5 ASE LSA: 5 ASE LSA:AdvRID:2.2.2.2 AdvRID:4.4.4.4 AdvRID:4.4.4.44 ASB LSA: LinkID:4.4.4.4LinkID:100.0.6.0 LinkID:100.0.6.0AdvRID:3.3.3.3 LinkID:4.4.4.4area0E1:100.0.3.1 E1:100.0.4.1E0:100.0.2.25 ASE LSA:E0:100.0.3.2AdvRID:4.4.4.4 RB:2.2.2.2RC:3.3.3.3 LinkID:100.0.6.0E0:100.0.4.2 E0:100.0.2.1 L0:100.0.6.1RA:1.1.1.1RD:4.4.4.4Loop0:100.0.1.1area2area1E0:100.0.6.2 RE 83 84. OSPF LSA LSDB SPF 84 85. 85 86. 1 1 LSDBA B RTA RTB LSA RTA 2 5 2 5 C LSA RTB RTC 3 3 LSA RTC D LSA RTD RTD ( 1 1 1 1 A B ABA B A B 2 2 2 2 C C C C 3 3 3 3 D D D D 86 87. SPF COST SPF Dijkstra OSPF SPF Root SPF OSPF OSPF OSPF Cost Cost OSPF 16 bit 1 65535 87 88. Cost 108/bandwidth 56-kbps serial link = 1785 10M Ethernet = 10 64-kbps serial link = 1562 T1 (1.544-Mbps serial link) = 64 Cost 88 89. P60AREA 0 Vlan3:40.1.1.1/24 E0:40.1.1.2/24 S1 R1E0/1 100 E0/24 S0:20.1.1.2/24Vlan2:30.1.1.2/24500200R2E1:30.1.1.1/24 S0:20.1.1.1/24 E0:10.1.1.1/24300 E0/1Vlan2:10.1.1.2/24S289 90. [R1]display ospf lsdb router40.1.1.0 S1 40.1.1.2 R1B 2.2.2.2 1.1.1.1 Metric:100Metric:500 Metric:500 20.1.1.2 StubnetR220.1.1.0/243.3.3.3 90 91. Net40.1.1.0/2440.1.1.140.1.1.2S1 R1 B 1.1.1.1Metric:1002.2.2.2 30.1.1.2Metric:500Metric:500Metric:200 StubNet: 20.1.1.0/24 30.1.1.120.1.1.1Net30.1.1.0/24R2Metric:5003.3.3.3 10.1.1.1 Metric:300 Net:10.1.1.0/24 10.1.1.2S24.4.4.4 91 92. SPFOSPF Metric40.1.1.1 1.1.1.1 100 S120.1.1.1 3.3.3.3 1.1.1.1 500+200=700100 TransNet 40.1.1.0/24 500+200+100 20.1.1.1 3.3.3.3 1.1.1.1 80020.1.1.1 3.3.3.3 500 R240.1.1.1 1.1.1.1 3.3.3.3 100+200=300500 Stubnet 20.1.1.0/24100+200+500 40.1.1.1 1.1.1.1 3.3.3.3 80020.1.1.1 3.3.3.3 500+200=700 TransNet 30.1.1.0/2440.1.1.1 1.1.1.1 100+200=30020.1.1.1 3.3.3.3 4.4.4.4 500+300=800 S2 40.1.1.1 1.1.1.1 3.3.3.3 4.4.4.100+200+300 4600 TransNet 20.1.1.1 3.3.3.3 500+300=800 100+200+300 10.1.1.0/2440.1.1.1 1.1.1.1 3.3.3.3 600 92 93. R1 Net:40.1.1.0/24S1 40.1.1.1 40.1.1.2R1B 1.1.1.1 Metric:1002.2.2.230.1.1.2 20.1.1.2Metric:500 Metric:200 Stubnet Net:30.1.1.0/24 30.1.1.1 R220.1.1.0/243.3.3.3 10.1.1.1Metric:300Net:10.1.1.0/24 10.1.1.2 S24.4.4.493 94. Type = 3 Type = 3192.178.14.0 172.18.141.0 Mask = 255.255.255.240 Mask = 255.255.255.0 Metric = 120 Metric = 91172.18.141.0/24 192.178.14.0/28Area 0Area 394 95. Type = 510.53.11.0/24 10.53.11.0 Type = 4 Mask=255.255.255.01.2.3.4 Metric = 10Mask = 0.0.0.0 Metric = 89BGPASBRRouter ID = 1.2.3.4 Area 0 Area 2 AS Type5LSA Type4LSA 95 96. OSPF 10 OSPF CPU OSPF 96 97. OSPF LSA LSDB SPF 97 98. IP OSPF Display ospf peer Reset Ospf all OSPF 98 99. 1 5 PC S1 192.168.6.0R1S0: 192.168.0.2/24S2 192.168.5.0R2 S0: 192.168.0.1/24 E0: 192.168.3.1/24 E0: 192.168.4.1/24R1 R2 Area 0Area 1 Area 2 E0/1 E0/1192.168.5.0Vlan1: 192.168.3.2/24Vlan1: 192.168.4.2/24S1S2192.168.6.0 E0/24Vlan2: 192.168.5.1/24Vlan2: 192.168.6.1/24 E0/24 PC1 192.168.5.2/24PC2 192.168.6.2/24 192.168.5.1 192.168.6.1 99 100. 1 [S1-ospf]import-routedirect( ) [R1]ip rou 192.168.5.0 255.255.255.0 192.168.3.2 [R1-ospf]import-route static( ) R1S0: 192.168.0.2/24R2 OSPF E0: 192.168.3.1/24S0: 192.168.0.1/24 E0: 192.168.4.1/24 Area 0 Area 1 Area 2 S1E0/1 Vlan1: 192.168.3.2/24Vlan1: 192.168.4.2/24 E0/1 S2E0/24Vlan2: 192.168.5.1/24Vlan2: 192.168.6.1/24 E0/24VLAN IP PC1 192.168.5.2/24PC2 192.168.6.2/24 192.168.5.1 192.168.6.1100 101. 2 PC1 PC2 LOOP1 InternetLoop1: 211.100.2.1/24 VLAN2: 202.112.1.2/24VLAN3: 202.112.2.2/24 S2 OSPF E0: 202.112.1.1/24 S0: 192.168.0.1/24 200 S0: 192.168.0.2/24 E0: 202.112.2.1/24 R1E1: 192.168.3.1/24Area0 R2 E1: 192.168.4.1/24 100 200 E0/1 S1 E0/2 Vlan1: 192.168.3.2/24 Vlan3: 192.168.4.2/24 Vlan2: 192.168.5.1/24 Vlan4: 192.168.6.1/24VLAN IP E0/23 E0/24PC1: 192.168.5.2/24PC2: 192.168.6.2/24 192.168.5.1 192.168.6.1 101 102. 2 8 PC InternetLoop1: 211.100.2.1/24R1 192.168.5.0,192.168.6.0VLAN2: 202.112.1.2/24 VLAN3: 202.112.2.2/24 202.112.2.0,211.100.2.0S2R2: E0: 202.112.1.1/24 E0: 202.112.2.1/24S1 R1R2 R1S0: 192.168.0.1/24 200 S0: 192.168.0.2/24R2 E1: 192.168.3.1/24 Area0E1: 192.168.4.1/24 200S1 202.112.1.0 202.112.2.0100E0/1 S1 E0/2Vlan1: 192.168.3.2/24211.100.2.0Vlan2: 192.168.5.1/24Vlan3: 192.168.4.2/24R1 R2 E0/23 E0/24Vlan4: 192.168.6.1/24S2 192.168.0.0 192.168.6.0 PC1: 192.168.5.2/24 PC2: 192.168.6.2/24 192.168.5.1 192.168.6.1102 103. 2S2: [S2]ip rou 192.168.0.0 255.255.0.0 202.112.1.1 pre 50[S2]ip rou 192.168.0.0 255.255.0.0 202.112.2.1 pre 60[R1]ip rou 211.100.2.1 255.255.255.0 202.112.1.2[R1-ospf]import-route static cost 100 Internet[R1-ospf]import-route direct cost 100 Loop1: 211.100.2.1/24[R2]. cost 200 VLAN2: 202.112.1.2/24 VLAN3: 202.112.2.2/24[S1-ospf]import-route direct S2E0: 202.112.1.1/24 E0: 202.112.2.1/24 S0: 192.168.0.1/24 200 S0: 192.168.0.2/24 R1R2E1: 192.168.3.1/24100 Area0 200E1: 192.168.4.1/24 E0/1 S1 E0/2 Vlan1: 192.168.3.2/24 Vlan3: 192.168.4.2/24 Vlan2: 192.168.5.1/24Vlan4: 192.168.6.1/24E0/23 E0/24PC1: 192.168.5.2/24PC2: 192.168.6.2/24 192.168.5.1 192.168.6.1103 104. OSPF OSPF LSDB hello DR DD Request update flooding ack debug LSA LSDB LSDB LSA SPF 1 2 104 105. 1 2 3 1 Vlan 1.5 Ospf 0.5 Ospf 0.5 2 1 OSPF 1.5 OSPF 1 3 1 LSA LSDB 1 LSA LSDB 1 4 0.5 SPF 1 SPF 1 5 1 0.5 6 105 106. 1 OSPF 2 OSPF 106 107. P40 AS500 AS1000 P41 3 OSPF OSPF area area-id OSPF undo area area-id P51 13 S2 107 108. (3 25 ) 108 109. 109