OSPF3 lsa.docx
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OSPF3 lsa.docx
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OSPF3lsa
LSA1:
直连的网段、直连的路由器(邻居)、虚电路。
Showipospfdatabase
Showipospfdatabaserouter1.1.1.1
R1#shiposdarouter1.1.1.1
OSPFRouterwithID(1.1.1.1)(ProcessID1)
RouterLinkStates(Area0)
LSage:
1311-------------------------------------3600
Options:
(NoTOS-capability,DC)
LSType:
RouterLinks
LinkStateID:
1.1.1.1
AdvertisingRouter:
1.1.1.1
LSSeqNumber:
80000025
Checksum:
0xBA84
Length:
96
NumberofLinks:
6
Linkconnectedto:
aTransitNetwork------------ma网络
(LinkID)DesignatedRouteraddress:
10.1.1.3
(LinkData)RouterInterfaceaddress:
10.1.1.1
NumberofTOSmetrics:
0
TOS0Metrics:
10
Linkconnectedto:
aStubNetwork--------直连非ma网络
(LinkID)Network/subnetnumber:
1.1.1.1
(LinkData)NetworkMask:
255.255.255.255-----ospf宣告
NumberofTOSmetrics:
0
TOS0Metrics:
1
Linkconnectedto:
anotherRouter(point-to-point)
(LinkID)NeighboringRouterID:
3.3.3.3
(LinkData)RouterInterfaceaddress:
13.1.1.1
NumberofTOSmetrics:
0
TOS0Metrics:
64
Linkconnectedto:
aStubNetwork
(LinkID)Network/subnetnumber:
13.1.1.0
(LinkData)NetworkMask:
255.255.255.0
NumberofTOSmetrics:
0
TOS0Metrics:
64
Linkconnectedto:
anotherRouter(point-to-point)
(LinkID)NeighboringRouterID:
2.2.2.2
(LinkData)RouterInterfaceaddress:
12.1.1.1
NumberofTOSmetrics:
0
TOS0Metrics:
64
Linkconnectedto:
aStubNetwork
(LinkID)Network/subnetnumber:
12.1.1.0
(LinkData)NetworkMask:
255.255.255.0
NumberofTOSmetrics:
0
TOS0Metrics:
64
LSA2:
由dr公告给网段中的其他路由器、通告网络的掩码、网络中的邻居。
Showipospfdatabase
在routerlsa中linkid和advrouter是相同的,在netlsa中linkid为dr
Showipospfdatabasenetwork10.1.1.3
LSA3:
描述域间路由、目标网络前缀和掩码、cost.由ABR公告。
Showipospfdatabase
Showipospfdatabasesummary
R5#shipospfdatabasesummary
OSPFRouterwithID(35.1.1.5)(ProcessID1)
SummaryNetLinkStates(Area35)
RoutingBitSetonthisLSA
LSage:
343
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
1.1.1.1(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0x6FB2
Length:
28
NetworkMask:
/32
TOS:
0Metric:
11
RoutingBitSetonthisLSA
LSage:
343
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
2.2.2.2(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0x41DC
Length:
28
NetworkMask:
/32
TOS:
0Metric:
11
RoutingBitSetonthisLSA
LSage:
346
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
3.3.3.3(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0xAE75
Length:
28
NetworkMask:
/32
TOS:
0Metric:
1
RoutingBitSetonthisLSA
LSage:
346
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
10.1.1.0(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0xF921
Length:
28
NetworkMask:
/24
TOS:
0Metric:
10
RoutingBitSetonthisLSA
LSage:
346
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
12.1.1.0(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0x6276
Length:
28
NetworkMask:
/24
TOS:
0Metric:
74
RoutingBitSetonthisLSA
LSage:
347
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
13.1.1.0(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0xF0F0
Length:
28
NetworkMask:
/24
TOS:
0Metric:
64
RoutingBitSetonthisLSA
LSage:
347
Options:
(NoTOS-capability,DC,Upward)
LSType:
SummaryLinks(Network)
LinkStateID:
24.1.1.0(summaryNetworkNumber)
AdvertisingRouter:
3.3.3.3
LSSeqNumber:
80000001
Checksum:
0xC507
Length:
28
NetworkMask:
/24
TOS:
0Metric:
74
R3#showipospfdatabasesummary24.1.1.0
本区域summarynetlinksstate中存储着所有本区域外所有网段的条目。
在看LSA3信息时,我们可以看到这条路由是哪个ABR通告的,这个网段的掩码是多少。
域间路由有距离矢量的特征。
R5showiproute
一个区域外条目cost等于本区域内cost加上ABR通告的cost.域间路由标识oIA.我们可以用showiproute|oIA来查找域间路由。
重分布路由OE2和OE1,showiproute|oe2.可以在做重分布的时候更改类型redistributeripsubnetsmetric-type1
R2#shipospfdatabase(asbr)部分信息:
R1#shiposda(ospf进程的一个普通路由器)部分信息:
R3#shipsoda(abr)部分信息:
R5:
shiposda(通过asbr和abr才能访问as外的网络)部分信息:
LSA4:
ABR产生描述ASBR的信息,发送到此ABR直连但是ASBR不直连的网络。
Showipospfdatabaseasbr-summary
LSA5:
描述AS域外的每一个网段,ASBR产生发送给域内的每个路由器。
Showipospfdatabaseexternal
R5#shipospfdaexternal
OSPFRouterwithID(35.1.1.5)(ProcessID1)
Type-5ASExternalLinkStates
RoutingBitSetonthisLSA
LSage:
168
Options:
(NoTOS-capability,DC)
LSType:
ASExternalLink
LinkStateID:
4.4.4.0(ExternalNetworkNumber)
AdvertisingRouter:
2.2.2.2
LSSeqNumber:
80000001
Checksum:
0x1B71
Length:
36
NetworkMask:
/24
MetricType:
2(Largerthananylinkstatepath)
TOS:
0
Metric:
20
ForwardAddress:
0.0.0.0
ExternalRouteTag:
0
RoutingBitSetonthisLSA
LSage:
489
Options:
(NoTOS-capability,DC)
LSType:
ASExternalLink
LinkStateID:
24.1.1.0(ExternalNetworkNumber)
AdvertisingRouter:
2.2.2.2
LSSeqNumber:
80000002
Checksum:
0x5924
Length:
36
NetworkMask:
/24
MetricType:
2(Largerthananylinkstatepath)
TOS:
0
Metric:
20
ForwardAddress:
0.0.0.0
ExternalRouteTag:
0
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