小網管筆記

====================== Configuration of OSPF ===========================

Router(config)#router ospf process-id   //識別碼(1-65535)

Router(config-router)#network ip-address mask area area-id

Router(config)#router ospf 100

Router(config-router)#network 10.1.1.2 0.0.0.0 area 0 //#10.1.1.2 Router上的SerialPort 01

Router(config-router)#network 10.2.2.2 0.0.0.0 area 0 //#10.2.2.2 Router上的SerialPort 02

Loopback Interface(回繞介面)

 RID：RID(RouterID)的決定是以介面中最高的邏輯IP Adderess來做為 RouterID

  介面interface：(1)實體介面  (2)回繞介面(虛擬介面)

 Configuration of Loopback Interface

 Router(config)#interface loopback 0 // 0相當於loopback的名字

 Router(config-if)#ip address 200.200.200.200 255.255.255.0 //給loopback 0 IP和Mask

 Router(config-if)#shutdown 

 Router(config-if)#no shutdown 

=================== Verifying the OSPF Configuration =======================

Router#show ip protocols

Routing Protocol is "ospf 10"  
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Router ID 192.168.97.36    
  It is an autonomous system boundary router
  Redistributing External Routes from,
    connected, includes subnets in redistribution
    static with metric mapped to 50, includes subnets in redistribution
  Number of areas in this router is 1. 1 normal 0 stub 0 nssa
  Maximum path: 4
  Routing for Networks:
    192.168.98.50 0.0.0.0 area 100
 Reference bandwidth unit is 100 mbps
  Routing Information Sources:
    Gateway         Distance      Last Update

Router#show ip route 

O E1    204.132.66.80/30 [110/30] via 154.102.98.40, 04:42:38, FastEthernet0/0
O E1    204.132.66.101/32 [110/30] via 154.102.98.2, 04:42:38, FastEthernet0/0

Router#show ip ospf    //路由器ID,區域資訊,SPF統計,及LSA逾時計時器的資訊

 Routing Process "ospf 10" with ID 192.168.20.1  //RID是該路由器最高的IP
 Start time: 00:00:33.416, Time elapsed: 7w4d
 Supports only single TOS(TOS0) routes
 Supports opaque LSA
 Supports Link-local Signaling (LLS)
 Supports area transit capability
 It is an autonomous system boundary router
 Redistributing External Routes from,
    connected, includes subnets in redistribution
    static with metric mapped to 50, includes subnets in redistribution
 Router is not originating router-LSAs with maximum metric
 Initial SPF schedule delay 5000 msecs
 Minimum hold time between two consecutive SPFs 10000 msecs
 Maximum wait time between two consecutive SPFs 10000 msecs
 Incremental-SPF disabled
 Minimum LSA interval 5 secs
 Minimum LSA arrival 1000 msecs
 LSA group pacing timer 240 secs
 Interface flood pacing timer 33 msecs
 Retransmission pacing timer 66 msecs
 Number of external LSA 3337. Checksum Sum 0x6886109
 Number of opaque AS LSA 0. Checksum Sum 0x000000
 Number of DCbitless external and opaque AS LSA 0
 Number of DoNotAge external and opaque AS LSA 0
 Number of areas in this router is 1. 1 normal 0 stub 0 nssa
 Number of areas transit capable is 1
 External flood list length 0
 IETF NSF helper support enabled
 Cisco NSF helper support enabled
    Area 100
        Number of interfaces in this area is 1
        This area has transit capability
        Area has message digest authentication
        SPF algorithm last executed 04:44:59.564 ago
        SPF algorithm executed 93 times
        Area ranges are
        Number of LSA 124. Checksum Sum 0x3F5148
        Number of opaque link LSA 0. Checksum Sum 0x000000
        Number of DCbitless LSA 0
        Number of indication LSA 0
        Number of DoNotAge LSA 0
        Flood list length 0

Router#show ip ospf neighbor  //鄰居與緊鄰狀態的OSPF資訊,也會顯示DR或BDR
Neighbor ID        Pri   State                Dead Time     Address          Interface
192.168.40.2      0   2WAY/DROTHER    00:00:39    192.168.20.5    FastEthernet0/0
192.168.40.5      1   FULL/BDR             00:00:37    192.168.20.2    FastEthernet0/0

Router#sh ip ospf interface
Serial0/0 is up, line protocol is up
  Internet Address 192.168.20.1/24, Area 100     //介面IP位址,指定區域
  Process ID 10,Router ID 192.168.20.1,Network Type BROADCAST,Cost: 10

  //程序ID,路由器ID,網路類型,成本
  Transmit Delay is 1 sec, State DROTHER, Priority 0  //優先權,DR/BDR,計時器的間隔
  Designated Router (ID) 192.168.20.1, Interface address 192.168.10.1
  Backup Designated router (ID) 192.168.20.5, Interface address 192.168.10.5 //緊鄰鄰居的資訊
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    oob-resync timeout 40
    Hello due in 00:00:08
  Supports Link-local Signaling (LLS)
  Cisco NSF helper support enabled
  IETF NSF helper support enabled
  Index 1/1, flood queue length 0
  Next 0x0(0)/0x0(0)
  Last flood scan length is 0, maximum is 39
  Last flood scan time is 0 msec, maximum is 160 msec
  Neighbor Count is 37, Adjacent neighbor count is 2
    Adjacent with neighbor 192.168.20.5  (Backup Designated Router)
    Adjacent with neighbor 192.168.20.1  (Designated Router)
  Suppress hello for 0 neighbor(s)
  Message digest authentication enabled
    Youngest key id is 10

Router#sh ip ospf database  //顯示的資訊表示鏈路的數目,鄰居的路由器ID,與我們所提的拓墣資料庫

            OSPF Router with ID (192.168.20.1) (Process ID 10)

                Router Link States (Area 100)

Link ID               ADV Router       Age         Seq#             Checksum   Link count
192.168.20.1    192.168.20.1    1359        0x8001A5F9   0x005399     1
192.168.40.1    192.168.40.1    1705        0x8001A5D2   0x009F71     1
192.168.40.2    192.168.40.2    723          0x80001C59   0x00E6BE     2

===========================  手動修改AD值==============================

  Router(config)#router ospf 1         //設定OSPF的AD值為1

  Router(config-router)#distance 89 //把OSPF的AD值設為89 

  =====================移除RIP、IGRP、EIGRP、OSPF ====================

  Router(config)#no router rip      //移除RIP
  Router(config)#no router igrp    //移除IGRP
  Router(config)#no router eigrp  //移除EIGRP