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  • HCNA修改OSPF基准带宽

    1、拓扑图

    2、R1配置ip开启OSPF

    The device is running!

    <Huawei>sys
    Enter system view, return user view with Ctrl+Z.
    [Huawei]sysn R1
    [R1]int    
    [R1]interface g0/0/0    
    [R1]interface g0/0/0
    [R1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
    [R1-GigabitEthernet0/0/0]
    Dec 11 2017 19:00:27-08:00 R1 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
    on the interface GigabitEthernet0/0/0 has entered the UP state.
    [R1-GigabitEthernet0/0/0]q
    [R1]os    
    [R1]ospf

      Please check whether system data has been changed, and save data in time

      Configuration console time out, please press any key to log on

    <R1>
    <R1>
    <R1>
    <R1>dis ip rou    
    <R1>dis ip routing-table
    Route Flags: R - relay, D - download to fib
    ------------------------------------------------------------------------------
    Routing Tables: Public
             Destinations : 7        Routes : 7        

    Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

           12.1.1.0/24  Direct  0    0           D   12.1.1.1        GigabitEthernet
    0/0/0
           12.1.1.1/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
    0/0/0
         12.1.1.255/32  Direct  0    0           D   127.0.0.1       GigabitEthernet
    0/0/0
          127.0.0.0/8   Direct  0    0           D   127.0.0.1       InLoopBack0
          127.0.0.1/32  Direct  0    0           D   127.0.0.1       InLoopBack0
    127.255.255.255/32  Direct  0    0           D   127.0.0.1       InLoopBack0
    255.255.255.255/32  Direct  0    0           D   127.0.0.1       InLoopBack0

    <R1>dis int
    GigabitEthernet0/0/0 current state : UP
    Line protocol current state : UP
    Last line protocol up time : 2017-12-11 19:00:27 UTC-08:00
    Description:HUAWEI, AR Series, GigabitEthernet0/0/0 Interface
    Route Port,The Maximum Transmit Unit is 1500
    Internet Address is 12.1.1.1/24
    IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc7d-761e
    Last physical up time   : 2017-12-11 18:59:04 UTC-08:00
    Last physical down time : 2017-12-11 18:58:53 UTC-08:00
    Current system time: 2017-12-11 19:06:00-08:00
    Port Mode: FORCE COPPER
    Speed : 1000,  Loopback: NONE
    Duplex: FULL,  Negotiation: ENABLE
    Mdi   : AUTO
    Last 300 seconds input rate 0 bits/sec, 0 packets/sec
    Last 300 seconds output rate 0 bits/sec, 0 packets/sec
    Input peak rate 0 bits/sec,Record time: -
    Output peak rate 96 bits/sec,Record time: 2017-12-11 19:00:33

    Input:  0 packets, 0 bytes
      Unicast:                  0,  Multicast:                   0
      Broadcast:                0,  Jumbo:                       0
      Discard:                  0,  Total Error:                 0


    <R1>dis ip int br    
    <R1>dis ip int brief
    *down: administratively down
    ^down: standby
    (l): loopback
    (s): spoofing
    The number of interface that is UP in Physical is 2
    The number of interface that is DOWN in Physical is 2
    The number of interface that is UP in Protocol is 2
    The number of interface that is DOWN in Protocol is 2

    Interface                         IP Address/Mask      Physical   Protocol  
    GigabitEthernet0/0/0              12.1.1.1/24          up         up        
    GigabitEthernet0/0/1              unassigned           down       down      
    GigabitEthernet0/0/2              unassigned           down       down      
    NULL0                             unassigned           up         up(s)     
    <R1>dis int br    
    <R1>dis int brief
    PHY: Physical
    *down: administratively down
    (l): loopback
    (s): spoofing
    (b): BFD down
    ^down: standby
    (e): ETHOAM down
    (d): Dampening Suppressed
    InUti/OutUti: input utility/output utility
    Interface                   PHY   Protocol InUti OutUti   inErrors  outErrors
    GigabitEthernet0/0/0        up    up          0%     0%          0          0
    GigabitEthernet0/0/1        down  down        0%     0%          0          0
    GigabitEthernet0/0/2        down  down        0%     0%          0          0
    NULL0                       up    up(s)       0%     0%          0          0
    <R1>sys
    Enter system view, return user view with Ctrl+Z.
    [R1]ospf    
    [R1]ospf 100 rou    
    [R1]ospf 100 router-id 1.1.1.1
    [R1-ospf-100]net    
    [R1-ospf-100]net
    [R1-ospf-100]are    
    [R1-ospf-100]area 0
    [R1-ospf-100-area-0.0.0.0]net    
    [R1-ospf-100-area-0.0.0.0]network 12.1.1.1 0.0.0.0
    [R1-ospf-100-area-0.0.0.0]q
    [R1-ospf-100]q

    3、R2配置IP开启OSPF

    The device is running!
    <Huawei>

      Please check whether system data has been changed, and save data in time

      Configuration console time out, please press any key to log on

    <Huawei>sys
    Enter system view, return user view with Ctrl+Z.
    [Huawei]sysn    
    [Huawei]sysname R2
    [R2]int    
    [R2]interface g0/0/0
    [R2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
    Dec 11 2017 19:08:16-08:00 R2 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
    on the interface GigabitEthernet0/0/0 has entered the UP state.
    [R2-GigabitEthernet0/0/0]q
    [R2]int    
    [R2]interface g 0/0/1
    [R2-GigabitEthernet0/0/1]ip add 23.1.1.2 24
    Dec 11 2017 19:08:28-08:00 R2 %%01IFNET/4/LINK_STATE(l)[1]:The line protocol IP
    on the interface GigabitEthernet0/0/1 has entered the UP state.
    [R2-GigabitEthernet0/0/1]q
    [R2]ospf 100 rou    
    [R2]ospf 100 router-id 2.2.2.2
    [R2-ospf-100]are    
    [R2-ospf-100]area 0
    [R2-ospf-100-area-0.0.0.0]net    
    [R2-ospf-100-area-0.0.0.0]network 12.1.1.0 0.0.0.255

    4、R3配置IP开启OSPF


    The device is running!

    <Huawei>

      Please check whether system data has been changed, and save data in time

      Configuration console time out, please press any key to log on

    <Huawei>
    <Huawei>
    <Huawei>
    <Huawei>sys
    Enter system view, return user view with Ctrl+Z.
    [Huawei]sysn    
    [Huawei]sysname R3
    [R3]int    
    [R3]interface g0/0/1
    [R3-GigabitEthernet0/0/1]ip add 23.1.1.3 24
    [R3-GigabitEthernet0/0/1]
    Dec 11 2017 19:09:50-08:00 R3 %%01IFNET/4/LINK_STATE(l)[0]:The line protocol IP
    on the interface GigabitEthernet0/0/1 has entered the UP state.
    [R3-GigabitEthernet0/0/1]q
    [R3]ospf 100 rou    
    [R3]ospf 100 router-id 3.3.3.3
    [R3-ospf-100]are    
    [R3-ospf-100]area 0
    [R3-ospf-100-area-0.0.0.0]net    
    [R3-ospf-100-area-0.0.0.0]network 23.1.1.0 0.0.0.255
    [R3-ospf-100-area-0.0.0.0]q

    5、R1查看OSPF默认开销值


     Please check whether system data has been changed, and save data in time

      Configuration console time out, please press any key to log on

    <R1>dis ip rou    
    <R1>dis ip routing-table pro    
    <R1>dis ip routing-table protocol os    
    <R1>dis ip routing-table protocol ospf
    Route Flags: R - relay, D - download to fib
    ------------------------------------------------------------------------------
    Public routing table : OSPF
             Destinations : 1        Routes : 1        

    OSPF routing table status : <Active>
             Destinations : 1        Routes : 1

    Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

           23.1.1.0/24  OSPF    10   2           D   12.1.1.2        GigabitEthernet
    0/0/0

    OSPF routing table status : <Inactive>
             Destinations : 0        Routes : 0
            
            开销值为2
            因为默认基准带宽为100Mbps
            R1R2R3实际接口都为1000Mbps
            100/1000=0.1
            100/1000=0.1
            开销值不能为小数,变成整数为1  所以开销值为2


    6、更改R1R2R3基准带宽为1000Mbps查看COST值

        6.1更改R1基准带宽  

     <R1>sys
    Enter system view, return

    user view with Ctrl+Z.
    [R1]ospf 100
    [R1-ospf-100]bi    
    [R1-ospf-100]b    
    [R1-ospf-100]ban    
    [R1-ospf-100]bandwidth-reference ?
      INTEGER<1-2147483648>  The reference bandwidth (Mbits/s)
    [R1-ospf-100]ban    
    [R1-ospf-100]bandwidth-reference 1000
    Info: Reference bandwidth is changed. Please ensure that the reference bandwidth
     that is configured for all the routers are the same.
        6.2更改R2基准带宽
        <R2>sys
    Enter system view, return user view with Ctrl+Z.
    [R2]ospf 100
    [R2-ospf-100]ban    
    [R2-ospf-100]bandwidth-reference 1000
    Info: Reference bandwidth is changed. Please ensure that the reference bandwidth
     that is configured for all the routers are the same.
    [R2-ospf-100]
        6.3更改R3基准带宽
        [R3]ospf 100
    [R3-ospf-100]ban    
    [R3-ospf-100]bandwidth-reference 1000
    Info: Reference bandwidth is changed. Please ensure that the reference bandwidth
     that is configured for all the routers are the same.
        6.4R1上查看开销值
        <R1>dis ip routing-table protocol ospf
    Route Flags: R - relay, D - download to fib
    ------------------------------------------------------------------------------
    Public routing table : OSPF
             Destinations : 1        Routes : 1        

    OSPF routing table status : <Active>
             Destinations : 1        Routes : 1

    Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

           23.1.1.0/24  OSPF    10   2           D   12.1.1.2        GigabitEthernet
    0/0/0

    OSPF routing table status : <Inactive>
             Destinations : 0        Routes : 0

        开销值仍是2 因为1000/1000+1000/1000=2


    7、现在将R1R2基准带宽全改为10000Mbps,R3基准带宽仍为1000Mbps,再查看开销值


        7.1更改R1基准带宽
        <R1>sys
    Enter system view, return user view with Ctrl+Z.
    [R1]ospf 100
    [R1-ospf-100]ban    
    [R1-ospf-100]bandwidth-reference 10000
    Info: Reference bandwidth is changed. Please ensure that the reference bandwidth
     that is configured for all the routers are the same.
    [R1-ospf-100]q
        7.2更改R2基准带宽
        <R2>sys
    Enter system view, return user view with Ctrl+Z.
    [R2]ospf 100
    [R2-ospf-100]ban    
    [R2-ospf-100]bandwidth-reference 10000
    Info: Reference bandwidth is changed. Please ensure that the reference bandwidth
     that is configured for all the routers are the same.
    [R2-ospf-100]q
        7.3查看R1上ospf开销值
        [R1]dis ip routing-table protocol ospf
    Route Flags: R - relay, D - download to fib
    ------------------------------------------------------------------------------
    Public routing table : OSPF
             Destinations : 1        Routes : 1        

    OSPF routing table status : <Active>
             Destinations : 1        Routes : 1

    Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

           23.1.1.0/24  OSPF    10   20          D   12.1.1.2        GigabitEthernet
    0/0/0

    OSPF routing table status : <Inactive>
             Destination
             s : 0        Routes : 0
            
            注意开销值为20
            即:10000/1000+10000/1000=10+10=20
        7.4查看R3上OSPF开销值
        <R3>dis ip routing-table protocol ospf
    Route Flags: R - relay, D - download to fib
    ------------------------------------------------------------------------------
    Public routing table : OSPF
             Destinations : 1        Routes : 1        

    OSPF routing table status : <Active>
             Destinations : 1        Routes : 1

    Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

           12.1.1.0/24  OSPF    10   11          D   23.1.1.2        GigabitEthernet
    0/0/1

    OSPF routing table status : <Inactive>
             Destinations : 0        Routes : 0
             注意开销值11
             1000/1000+10000/1000=1+10=11

    总结:实际使用时将基准带宽调整一致,改为网络中的最大带宽,这样计算的值才有意义      

       


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  • 原文地址:https://www.cnblogs.com/me80/p/8024721.html
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