OSPF路由过滤专题.

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1、OSPF路由过滤专题编写/修订记录编写人/修订人编写/修订日期修订原因主要修订关键字李东磊2007年3月16日按模板进行修改，增加总结修改并总结李东磊2007年5月17日修改部分语句修改部分语句1. 简介路由协议在与对端路由器进行路由信息交换时，可能需要只接收或发布一部分满足给定条件的路由信息；路由协议在引入其它路由协议路由信息时，可能需要只引入一部分满足条件的路由信息，并对所引入的路由信息的某些属性进行设置和修改以使其满足本网的要求，这也就是我们常说的路由策略。下面将对OSPF路由过滤策略配置命令进行简单介绍，希望可以对大家的现场工作有所帮助。ZXR10的路由策略为进行 OSPF路由过滤提供

2、了三条命令，具体如下： 1. filter 命令filter命令可以控制外部LSA产生的路由是否导入路由表以及导入的优先级，但是不能控制外部LSA的学习。命令为：filter exact 没有exact关键字时对所有 范围的路由进行过滤，有 exact关键字表示 路由必须精确匹配 。描述导入匹配路由白优先级，范围 0255, 当路由的优先级为 255时，该路由不生效。如果配置了 filter,那么只有匹配了 filter条目的路由才 允许进入转发表，没有匹配filter条目的路由不允许进入转发表。用此命令可过滤由LSA为5类、7类的路由。2. area filter-list 命令area f

3、ilter-list命令只能用于 ABR上实现OSPF区域之间网络路由信息的过滤，即控制LSA 3能不能从一个区域导入到另一个区域，命令格式为：area filter-list prefix out | in 分area filter-list in 和area filter-list out命令，in表示某区域允许或者禁止某些3型LSA导入，out表示某区域允许或者禁止网段导出到其他的区域，具体允许还是禁止由prefix模版定，如果配置白p prefix为空，即prefix不进行配置，permit 0.0.0.0,路有器上也只会有该区域3类的LSA,其他LSA area filter-lis

4、t命令对其无效，默认是全部 deny。该路由器上会只有从该区域其他路由器学习到 的3型LSA。另外它对 LSA 5无效，prefix默认deny all。注：area filter-list 对 LSA 5 类无效；prefix 默认是 deny all 的。3. distribute-list 命令distribute-list命令可以在任意的路由器上，对各类外部导入路由都能进行过滤，路由功能相对前两条命令强大，它可以配合 access list/gateway/prefix /route-map模版使用，distribute-list in控制路由 的导入，distribute-list

5、out控制路由的发布，功能灵活多变，可以满足大部分的要求。命令为 ：distribute-list out | in |out | in | access-listout | in |gateway out | prefix gateway out |out | in | route-map out 它可以过滤各类 LSA的学习从而使路由表中不再有需要过滤的路由条目，但是对 LSA控制确 因各类LSA而不同。即对所有路由可以过滤路由表项，但又LSA的过滤却因LSA的类型不同而各不相同。2 .网络拓扑ZTE腺ROUTERALoopback1 1.1.1.1Loopback2 2222Loopba

6、ck3 3.3.3.3Vlan100OSPF 1AREA 010.10.10.10/2410.10.10.20/24Loopback1 4.4.4.4Loopback2 5.5.5.5Loopback3 6.6.6.6ROUTER B图1:用filter命令过滤 OSPF路由ZTE燃ROUTERALoopback1 4.4.4.4Loopback2 5.5.5.5Loopback3 6.6.6.6ROUTERBZTE糊ROUTERAVlan10010.10.10.10/2430.10.10.10/2430.10.10.20/24Loopback1 1.1.1.1Loopback2 2.2.2.

7、2Loopback3 3.3.3.3AREA 100OSPF 1AREA 010.10.10.20/24Vlan300Vlan20020.10.10.10/2420.10.10.20/24OSPF 1Loopback1 4.4.4.4Loopback2 5.5.5.5Loopback3 6.6.6.6ROUTERB图3： distribute-list命令的使用ZTW兴OSPF 1AREA 0Loopback1 1.1.1.1Loopback2 2.2.2.2OSPF 1Vlan100 AREA 0Loopback1 4.4.4.4Loopback2 5.5.5.5Vlan400 0.10.2

8、0.10/24 10.10.20.20/24ROUTERCLoopback3 3.3.3.3 10.10.10.10/2410.10.10.20/24 Loopback3 6.6.6.6ROUTERAREA 100ROUTERVlan20020.10.10.10/2420.10.10.20/24OSPF 130.10.10.20/24BVlan300Loopbackl 1.1.1.1OSPF 1Loopback2 2222Vlan100 AREA 0Loopback3 3333 10.10.10.10/2410.10.10.20/24Vlan200I 20.10.10.10/2420.10.1

9、0.20/24OSPF 1AREA 10030.10.10.10/2430.10.10.20/24Vlan300图2：用area filter-list命令过滤 OSPF路由图4：使用route - map过滤非LSA 5类路由3 .设备与版本信息设备类型测试版本支持的版本硬件配置ZXR10T160G/T64G/T40GV2.6.02D10.p02V2.6.02D10.p02 以后4 .配置4. 1使用filter命令过滤 OSPF路由图1说明：两台路由器之间起 OSPF路由，LOOPBACK地址通过重分布直连路由到路由表中。按图1进行组网环境搭建，并在路由器上进行以下配置：ROUTER AA

10、(config)# interface loopbacklA(config-if)#ip address 1.1.1.1 255.255.255.255A(config)# interface loopback2A(config-if)#ip address 2.2.2.2 255.255.255.255A(config)# interface loopback3A(config-if)#ip address 3.3.3.3 255.255.255.255A(config)#router ospf 1A(config-router)# network 10.10.10.0 0.0.0.255

11、area 0.0.0.0A(config-router)# network 1.1.1.1 0.0.0.0 area 0.0.0.0A(config-router)# network 2.2.2.2 0.0.0.0 area 0.0.0.0A(config-router)# network 3.3.3.3 0.0.0.0 area 0.0.0.0A(config-router)# redistribute connectedROUTER B 同上假定要在A上过滤5.5.5.5的路由，并将优先级改为 10,其他路由全部deny,则需配置：A(config-router)#filter 5.5.5

12、.5 255.255.255.255 10验证：在配置filter前A(config)#sh ip routeIPv4 Routing Table:DestMaskGwInterfaceOwnerpri metric1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 004.4.4.4255.255.255.255 10.10.10.20vlan100ospf

13、110205.5.5.5255.255.255.255 10.10.10.20vlan100ospf110206.6.6.6255.255.255.255 10.10.10.20vlan100ospf1102010.10.10.0255.255.255.010.10.10.10vlan100)direct0010.10.10.10255.255.255.255 10.10.10.10vlan100address 00A#sh ip ospf dataOSPF Router with ID (1.1.1.1) (Process ID 1)Router Link States (Area 0.0.

14、0.0)Link IDADV RouterAgeSeq#ChecksumLink count4.4.4.44.4.4.410800x800000040x745f11.1.1.11.1.1.110750x800000050xca2a1Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum10.10.10.101.1.1.110750x800000020x9c7eType-5 AS External Link StatesLink IDADV RouterAgeSeq#ChecksumTag4.4.4.44.4.4.410860

15、x800000010xe3fb32212254721.1.1.11.1.1.111510x800000010xc82f32212254725.5.5.54.4.4.410860x800000010xb52632212254722.2.2.21.1.1.111510x800000010x9a5932212254726.6.6.64.4.4.410860x800000010x875032212254723.3.3.31.1.1.13550x800000010x6c833221225472在配置后，A(config-router)#sh ip rouIPv4 Routing Table:DestMa

16、skGwInterfaceOwnerpri metric1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 005.5.5.5255.255.255.255 10.10.10.20vlan100ospf10 2010.10.10.0255.255.255.010.10.10.10vlan100direct 0010.10.10.10255.255.255.25

17、5 10.10.10.10vlan100address 00A#sh ip os daRouter Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum Link count4.4.4.44.4.4.415270x800000040x745f11.1.1.11.1.1.115220x800000050xca2a1Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum10.10.10.101.1.1.115220x800000020x9c7eType-5 AS E

18、xternal Link StatesLink IDADV RouterAgeSeq#Checksum Tag4.4.4.44.4.4.415330x800000010xe3fb32212254721.1.1.11.1.1.115980x800000010xc82f32212254725.5.5.54.4.4.415330x800000010xb52632212254722.2.2.21.1.1.115980x800000010x9a5932212254726.6.6.64.4.4.415330x800000010x875032212254723.3.3.31.1.1.18020x800000

19、010x6c833221225472可见，尽管ROUTER A做了路由过滤,但是在 ROUTER A 的LSA中还是可以看到 4.4.4.4和6.6.6.6相关的链路状态数据库。OSPF Filter方式的路由过滤不能阻止LSA的学习，但是可以控制那些LSA可以参与路由表的运算。因配置了 filter的路由才允许进入，其余全部deny,所以需要保留的路由条目需要再配置filter条目。在这如果需要保留所有路由条目，将优先级改为 100则需：A(config-router)#filter 0.0.0.0 0.0.0.0 100配置后A#sh ip routeIPv4 Routing Table:

20、DestMaskGwInterfaceOwner pri metric1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 004.4.4.4255.255.255.255 10.10.10.20vlan100ospf 100 205.5.5.5255.255.255.255 10.10.10.20vlan100ospf 10 206.6.6.6255.255.

21、255.255 10.10.10.20vlan100ospf 100 2010.10.10.0255.255.255.010.10.10.10vlan100direct 0010.10.10.10255.255.255.255 10.10.10.10vlan100address 004. 2使用area filter-list命令过滤OSPF路由图 2 说明：VLAN100 在 area。中,VLAN200 和 VLAN300 在 OSPF AREA 100 中，network 20 和30网段在area100中。按图2进行组网环境搭建，现需要 ROUTER A上在area 0中过滤掉20网段

22、的LSA ,保留30 网段得LSA,即A不接收处理20网段的LSA,也不往外发送20网段的LSA ,则在ROUTER A上 进行相应配置：（基本配置不做介绍）ROUTER A 配置：A(config)#router ospf 1A(config-router)#network 10.10.10.0 0.0.0.255 area 0.0.0.0A(config-router)# network 20.10.10.0 0.0.0.255 area 0.0.0.100A(config-router)#network 30.30.30.0 0.0.0.255 area 0.0.0.100/不向外发送L

23、SA/不接收处理LSA/deny20网段，seq按顺序处理保留其余网段A(config-router)#area 0.0.0.0 filter-list prefix test outA(config-router)#area 0.0.0.0 filter-list prefix test inA(config-router)# redistribute connectedA(config)# ip prefix-list test seq 1 deny 20.20.20.0 24A(config)#ip prefix-list test seq 2 permit 0.0.0.0 0ROUTE

24、R B 配置:B(config)#router ospf 1B(config-router)#network 10.10.10.0 0.0.0.255 area 0.0.0.0B(config-router)#network 20.20.20.0 0.0.0.255 area 0.0.0.100B(config-router)#network 30.30.30.0 0.0.0.255 area 0.0.0.100B(config-router)#redistribute connected验证：在配置 area filter-list命令前，A(config)#sh ip os daRoute

25、r Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#ChecksumLink count4.4.4.44.4.4.412780x800000090xd1f111.1.1.11.1.1.112760x800000090x2abb1Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum10.10.10.204.4.4.412780x800000020xad57Summary Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSe

26、q#Checksum30.30.30.04.4.4.41880x800000020xdc1630.30.30.01.1.1.150x800000010x39c6需保留此LSA20.20.20.04.4.4.417910x800000010x48c920.20.20.01.1.1.150x800000010xa27b需删除此LSARouter Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#ChecksumLink count4.4.4.44.4.4.41830x800000080xf9621.1.1.11.1.1.11760x800000

27、080x626f2Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum20.20.20.204.4.4.417400x800000010x46a130.30.30.101.1.1.11760x800000020xc915Summary Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum10.10.10.04.4.4.417900x800000010xb17e10.10.10.01.1.1.1110x800000010xc30Type-5 AS

28、 External Link StatesLink IDADV RouterAgeSeq#ChecksumTag4.4.4.44.4.4.48890x800000030xdffd32212254721.1.1.11.1.1.112840x800000030xc43132212254725.5.5.54.4.4.48890x800000030xb12832212254722.2.2.21.1.1.112840x800000030x965b32212254726.6.6.64.4.4.48890x800000030x835232212254723.3.3.31.1.1.112840x8000000

29、30x68853221225472在配置areafilter-list 命令后：A#sh ip ospf databaseOSPF Router with ID (1.1.1.1) (Process ID 1)Router Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum Link count4.4.4.44.4.4.44300x800000040xdbec11.1.1.11.1.1.14290x800000040x34b61Net Link States (Area 0.0.0.0)Link IDADV RouterAgeS

30、eq#Checksum10.10.10.204.4.4.44300x800000010xaf56Summary Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum30.30.30.04.4.4.44790x800000010xde1530.30.30.01.1.1.11200x800000010x39c6已保留20.20.20.04.4.4.44790x800000010x48c9/20网段的已删除Router Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Che

31、cksumLink count4.4.4.44.4.4.44210x800000050xf1ac21.1.1.11.1.1.14200x800000050x45852Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum20.20.20.204.4.4.44260x800000010x46a130.30.30.204.4.4.44230x800000020xdaedSummary Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum10.10.1

32、0.04.4.4.44800x800000010xb17e10.10.10.01.1.1.11210x800000010xc30Type-5 AS External Link StatesLink IDADV RouterAgeSeq#Checksum Tag4.4.4.44.4.4.45460x800000010xe3fb32212254721.1.1.11.1.1.15500x800000010xc82f32212254725.5.5.54.4.4.45460x800000010xb52632212254722.2.2.21.1.1.15500x800000010x9a5932212254

33、726.6.6.64.4.4.45460x800000010x875032212254723.3.3.31.1.1.15500x800000010x6c833221225472从上述结果得知，area filter-list命令过滤路由原理与filter命令完全/、同，area filter-list接控制LSA的接收与发送，当接收到对端的 LSA条目时直接过滤不参加计算。命令直为外，仕使用 area filter-list而令叼一th要迂息匕只配仕ABR 上使用，拴市U lsa tape 3 配小肥从一个区域到另,个区域，对 LSA tape 5类无效。最后，配置最后如没有加上permit

34、0.0.0.0 0命令则进行deny all处理，在实际操作时要谨慎。4. 3 distribute-list 命令的使用图3说明：VLAN100在骨干域中，VLAN200 与VLAN300在area100中，重分布直连路由到 OSPF 中.因area filter-list命令对5类LSA无效，而distribute-list可以在任意路由器上使用，可对任意的OSPF路由进彳T过滤.故这里我们试着做过滤5.5.5.5/32这条路由，保留4.4.4.4/32和6.6.6.6/32等的路由.distribute-list命令功能很强大，它将route-map, prefix, acl模版配合使用

35、，用法灵活多变 ，下面简 单介绍通过三种命令过滤路由的方法.1. 使用acl过滤ROUTER A上配置：(基本配置同二)A(config)#acl basic number 1A(config-basic-acl)#rule 1 deny 5.5.5.5A(config-basic-acl)#rule 2 permit anyA(config)#router ospf 1A(config-router)#distribute-list 1 in配置前A(config)#show ip routeIPv4 Routing Table:DestMaskGwInterfaceOwner pri me

36、tric1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 004.4.4.4255.255.255.255 20.20.20.20vlan200ospf 110 205.5.5.5255.255.255.255 20.20.20.20vlan200ospf 110 206.6.6.6255.255.255.255 20.20.20.20vlan200ospf

37、 110 20A(config)#show ip ospf databaseOSPF Router with ID (1.1.1.1) (Process ID 1)Router Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#ChecksumLink count10.10.20.2010.10.20.201680x800000130x72dd14.4.4.44.4.4.41650x800000130xbdfb11.1.1.11.1.1.11700x800000170x3a1f2Net Link States (Area 0.0.0.0)Lin

38、k IDADV RouterAgeSeq#Checksum10.10.20.2010.10.20.201630x8000000c0x7f1910.10.10.204.4.4.414250x8000000d0x9762Summary Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum30.30.30.04.4.4.42230x8000000f0xc22330.30.30.01.1.1.110100x800000010x39c620.20.20.04.4.4.414790x8000000d0x30d520.20.20.01.

39、1.1.110100x800000010xa27bRouter Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#ChecksumLink count4.4.4.44.4.4.41610x800000150xd1bc21.1.1.11.1.1.11760x800000150x25952Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum20.20.20.204.4.4.413760x8000000d0x2ead30.30.30.204.4.4.41610x80000

40、0100xbefbSummary Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum10.10.20.04.4.4.42200x8000000b0x39e110.10.20.01.1.1.110110x800000010x9d9410.10.10.04.4.4.415360x8000000d0x998a10.10.10.01.1.1.110110x800000010xc30Type-5 AS External Link StatesLink IDADV RouterAgeSeq#Checksum Tag4.4.4.4

41、4.4.4.48100x8000000e0xc90932212254721.1.1.11.1.1.110110x800000010xc82f32212254725.5.5.54.4.4.48100x8000000e0x9b3332212254722.2.2.21.1.1.110110x800000010x9a5932212254726.6.6.64.4.4.48100x8000000e0x6d5d32212254723.3.3.31.1.1.110110x800000010x6c833221225472配置后：A#sh ip routeIPv4 Routing Table:DestMaskGw

42、InterfaceOwnerpri metric1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 004.4.4.4255.255.255.255 20.20.20.20vlan200ospf 110 206.6.6.6255.255.255.255 20.20.20.20vlan200ospf 110 20A#show ip ospf databaseOS

43、PF Router with ID (1.1.1.1) (Process ID 1)Router Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#ChecksumLink count10.10.20.2010.10.20.202440x800000130x72dd14.4.4.44.4.4.42410x800000130xbdfb11.1.1.11.1.1.12460x800000170x3a1f2Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum10.10.20.20

44、10.10.20.202390x8000000c0x7f1910.10.10.204.4.4.415010x8000000d0x9762Summary Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum30.30.30.04.4.4.42990x8000000f0xc22330.30.30.01.1.1.110860x800000010x39c620.20.20.04.4.4.415550x8000000d0x30d520.20.20.01.1.1.110860x800000010xa27bRouter Link Sta

45、tes (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum Link count4.4.4.44.4.4.42360x800000150xd1bc21.1.1.11.1.1.12510x800000150x25952Net Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum20.20.20.204.4.4.414510x8000000d0x2ead30.30.30.204.4.4.42360x800000100xbefbSummary Net Link States (Area

46、0.0.0.100)Link IDADV RouterAgeSeq#Checksum10.10.20.04.4.4.42950x8000000b0x39e110.10.20.01.1.1.110860x800000010x9d9410.10.10.04.4.4.416110x8000000d0x998a10.10.10.01.1.1.110860x800000010xc30Type-5 AS External Link StatesLink IDADV RouterAgeSeq#Checksum Tag4.4.4.44.4.4.48850x8000000e0xc90932212254721.1

47、.1.11.1.1.110860x800000010xc82f32212254725.5.5.54.4.4.48850x8000000e0x9b3332212254722.2.2.21.1.1.110860x800000010x9a5932212254726.6.6.64.4.4.48850x8000000e0x6d5d32212254723.3.3.31.1.1.110860x800000010x6c833221225472可见，使用ACL过滤OSPF LSA 5类路由不会影响LSA的导入。1.使用 prefix-list 过滤ROUTER A上配置为：配置一个名为test的前缀列表序号小的

48、优先执行A(config)# ip prefix-list test seq 1 deny 5.5.5.5 32A(config)# ip prefix-list test seq 2 permit 0.0.0.0 0A(config)#router ospf 1A(config-router)#distribute-list prefix test in配置后：A(config-router)#show ip routeDestMaskGwInterfaceOwnerpri1.1.1.1255.255.255.255 1.1.1.1loopback1address 002.2.2.2255.

49、255.255.255 2.2.2.2loopback2address 003.3.3.3255.255.255.255 3.3.3.3loopback3address 004.4.4.4255.255.255.255 20.20.20.20vlan200ospf110 206.6.6.6255.255.255.255 20.20.20.20vlan200ospf110 20IPv4 Routing Table:metric配置后show ip ospf database结果证明数据库也是不变的.即过滤了 LSA 5类的路由，但是数据库上还是会有这条 5类LSA的。2. 使用routemap过

50、滤在原有的基础上，我们在 ROUTER A设备上再连接一台路由器，具体见图4:图4说明：在area 0中力口入 ROUTER C ，宣告相应网段。在ROUTER B上学习到10.10.20.0/24网段的路由，我们用route-map命令将其过滤.ROUTER B上配置为：B(config) #acl extend number 100B(config-ext-acl)#rule 1 deny ip 10.10.20.0 0.0.0.255 anyB(config-ext-acl)# rule 2 permit ip any anyB(config)#route-map test permit

51、 1B(config-route-map)#match ip address 100B(config) #router ospf 1B(config-router)#distribute-list route-map test in验证，在配置前：B#show ip routeIPv4 Routing Table:DestMaskGwInterfaceOwnerpri metric1.1.1.1255.255.255.255 20.20.20.10vlan200ospf110 202.2.2.2255.255.255.255 20.20.20.10vlan200ospf 110 203.3.3

52、.3255.255.255.255 20.20.20.10vlan200ospf110 204.4.4.4255.255.255.255 4.4.4.4loopback1address 005.5.5.5255.255.255.255 5.5.5.5loopback2address 006.6.6.6255.255.255.255 6.6.6.6loopback3address 0010.10.10.0255.255.255.010.10.10.20vlan100direct 0010.10.10.20255.255.255.255 10.10.10.20vlan100address 0010

53、.10.20.0255.255.255.0 10.10.10.10vlan100 ospf110 2 配置后无止匕路由20.20.20.0255.255.255.020.20.20.20vlan200direct 0020.20.20.20255.255.255.255 20.20.20.20vlan200address 0030.30.30.0255.255.255.030.30.30.20vlan300direct 0030.30.30.20255.255.255.255 30.30.30.20vlan300address 00B#show ip ospf databaseOSPF Rou

54、ter with ID (4.4.4.4) (Process ID 1)Router Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum Link count10.10.20.2010.10.20.202580x800000160x6ce014.4.4.44.4.4.42580x800000160xb7fe11.1.1.11.1.1.12600x8000001a0x34222Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum10.10.20.2010.10

55、.20.202580x8000000f0x791c10.10.10.204.4.4.415180x800000100x9165Summary Net Link States (Area 0.0.0.0)Link IDADV RouterAgeSeq#Checksum30.30.30.04.4.4.43310x800000120xbc2630.30.30.01.1.1.114620x800000010x39c620.20.20.04.4.4.415870x800000100x2ad820.20.20.01.1.1.114620x800000010xa27bRouter Link States (Area 0.0.0.100)Link IDADV RouterAgeSeq#Checksum Li