• 交换机双工速率匹配


    GNS3图标

    交换机若是双工出现问题,可能会出现很严重的丢包现象;若是速率不同,就直接无法正常通信。那么出现这种情况该怎么配置?


    实验拓扑

    拓扑

    使用两台交换机直连,每台下面再连接一台VPC。地址规划如下:

    名称 IP地址
    PC1 192.168.10.10/24
    PC2 192.168.10.20/24

    配置方法

    接口模式下配置speed以及duplex

    SW1#configure terminal
    SW1(config)#interface fastEthernet 1/0
    SW1(config-if)#speed ?
      10    Force 10 Mbps operation
      100   Force 100 Mbps operation
      auto  Enable AUTO speed configuration
    SW1(config-if)#duplex ?
      auto  Enable AUTO duplex configuration
      full  Force full duplex operation
      half  Force half-duplex operation
    

    配置过程

    SW1

    • SW1关闭路由功能
    SW1#configure terminal
    SW1(config)#no ip routing
    
    • 配置全双工,接口速率为100。
    SW1(config)#interface fastEthernet 1/0
    SW1(config-if)#speed 100
    SW1(config-if)#duplex full
    
    • 查询配置,show interfaces fastEthernet 1/0,第七行。
    SW1(config-if)#end
    SW1#show interfaces fastEthernet 1/0
    FastEthernet1/0 is up, line protocol is up
      Hardware is Fast Ethernet, address is c201.2c14.f100 (bia c201.2c14.f100)
      MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
         reliability 255/255, txload 1/255, rxload 1/255
      Encapsulation ARPA, loopback not set
      Keepalive set (10 sec)
      Full-duplex, 100Mb/s
      ARP type: ARPA, ARP Timeout 04:00:00
      Last input 00:00:04, output never, output hang never
      Last clearing of "show interface" counters never
      Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
      Queueing strategy: fifo
      Output queue: 0/40 (size/max)
      5 minute input rate 0 bits/sec, 0 packets/sec
      5 minute output rate 0 bits/sec, 0 packets/sec
         0 packets input, 0 bytes, 0 no buffer
         Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
         0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
         0 input packets with dribble condition detected
         0 packets output, 0 bytes, 0 underruns
         0 output errors, 0 collisions, 2 interface resets
         0 babbles, 0 late collision, 0 deferred
         0 lost carrier, 0 no carrier
         0 output buffer failures, 0 output buffers swapped out
    

    SW2

    • SW2配置与SW1相同,以下为简写配置过程。
    SW2#conf t
    SW2(config)#no ip routing
    SW2(config)#int f1/0
    SW2(config-if)#spe 100
    SW2(config-if)#du f
    SW2(config-if)#do show int f1/0
    FastEthernet1/0 is up, line protocol is up
      Hardware is Fast Ethernet, address is c202.5d60.f100 (bia c202.5d60.f100)
      MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
         reliability 255/255, txload 1/255, rxload 1/255
      Encapsulation ARPA, loopback not set
      Keepalive set (10 sec)
      Full-duplex, 100Mb/s
      ARP type: ARPA, ARP Timeout 04:00:00
      Last input 00:00:01, output never, output hang never
      Last clearing of "show interface" counters never
      Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
      Queueing strategy: fifo
      Output queue: 0/40 (size/max)
      5 minute input rate 0 bits/sec, 0 packets/sec
      5 minute output rate 0 bits/sec, 0 packets/sec
         0 packets input, 0 bytes, 0 no buffer
         Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
         0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
         0 input packets with dribble condition detected
         0 packets output, 0 bytes, 0 underruns
         0 output errors, 0 collisions, 2 interface resets
         0 babbles, 0 late collision, 0 deferred
         0 lost carrier, 0 no carrier
         0 output buffer failures, 0 output buffers swapped out
    

    PING 测试

    配置 IP 地址

    PC1> ip 192.168.10.10 255.255.255.0
    Checking for duplicate address...
    PC1 : 192.168.10.10 255.255.255.0
    
    PC2> ip 192.168.10.20
    Checking for duplicate address...
    PC1 : 192.168.10.20 255.255.255.0
    

    PING

    PC1> ping 192.168.10.20
    84 bytes from 192.168.10.20 icmp_seq=1 ttl=64 time=1.884 ms
    84 bytes from 192.168.10.20 icmp_seq=2 ttl=64 time=1.838 ms
    84 bytes from 192.168.10.20 icmp_seq=3 ttl=64 time=0.947 ms
    84 bytes from 192.168.10.20 icmp_seq=4 ttl=64 time=1.835 ms
    84 bytes from 192.168.10.20 icmp_seq=5 ttl=64 time=0.846 ms
    
    PC2> ping 192.168.10.10
    84 bytes from 192.168.10.10 icmp_seq=1 ttl=64 time=0.922 ms
    84 bytes from 192.168.10.10 icmp_seq=2 ttl=64 time=0.954 ms
    84 bytes from 192.168.10.10 icmp_seq=3 ttl=64 time=1.846 ms
    84 bytes from 192.168.10.10 icmp_seq=4 ttl=64 time=1.846 ms
    84 bytes from 192.168.10.10 icmp_seq=5 ttl=64 time=0.995 ms
    

    最后

    交换机之间双工速率匹配如上,下一篇关于静态路由实验。

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  • 原文地址:https://www.cnblogs.com/llife/p/11327741.html
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