网络工程 - 具有自动协商功能的快速以太网路由器和千兆以太网交换机之间的双工不匹配 - 吾爱随笔录

我正在将快速以太网 0/0 接口上的 c3745 路由器与 GNS3 上千兆以太网 0/1 上的 IOSvL2 交换机连接起来。

对于交换机上的所有接口，我已将交换机上的协商设置为自动。并将路由器接口上的双工和速度设置为auto。

但我仍然在交换机上收到双工不匹配消息。

这是我的路由器配置：

Current configuration : 1098 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.1.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0
 no ip address
 shutdown
 clock rate 2000000
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/1
 no ip address
 shutdown
 clock rate 2000000
!
interface Serial0/2
 no ip address
 shutdown
 clock rate 2000000
!
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
no cdp log mismatch duplex
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

和我的交换机配置：

Current configuration : 3548 bytes
!
! Last configuration change at 18:20:49 UTC Tue Apr 16 2019
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname Switch
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
!
ip cef
no ipv6 cef
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface GigabitEthernet0/0
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/1
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/3
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/0
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/1
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet1/3
 media-type rj45
 negotiation auto
!
interface GigabitEthernet2/0
 media-type rj45
 negotiation auto
!
interface GigabitEthernet2/1
 media-type rj45
 negotiation auto
!
interface GigabitEthernet2/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet2/3
 media-type rj45
 negotiation auto
!
interface GigabitEthernet3/0
 media-type rj45
 negotiation auto
!
interface GigabitEthernet3/1
 media-type rj45
 negotiation auto
!
interface GigabitEthernet3/2
 media-type rj45
 negotiation auto
!
interface GigabitEthernet3/3
 media-type rj45
 negotiation auto
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0
line vty 0 4
 login
!
!
end

当我在路由器上运行show interfaces时，我得到了这个：

FastEthernet0/0 is up, line protocol is up
  Hardware is Gt96k FE, address is c401.07a8.0000 (bia c401.07a8.0000)
  Internet address is 192.168.1.1/24
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Half-duplex, 10Mb/s, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:21, output 00:00:08, 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
     50 packets input, 8748 bytes
     Received 50 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     55 packets output, 5963 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface reset

当我运行show interfaces status时，在交换机上我得到了这个：

Port      Name               Status       Vlan       Duplex  Speed Type
Gi0/0                        connected    1          a-full   auto RJ45
Gi0/1                        connected    1          a-full   auto RJ45
Gi0/2                        connected    1          a-full   auto RJ45
Gi0/3                        connected    1          a-full   auto RJ45
Gi1/0                        connected    1          a-full   auto RJ45
Gi1/1                        connected    1          a-full   auto RJ45
Gi1/2                        connected    1          a-full   auto RJ45
Gi1/3                        connected    1          a-full   auto RJ45
Gi2/0                        connected    1          a-full   auto RJ45
Gi2/1                        connected    1          a-full   auto RJ45
Gi2/2                        connected    1          a-full   auto RJ45
Gi2/3                        connected    1          a-full   auto RJ45
Gi3/0                        connected    1          a-full   auto RJ45
Gi3/1                        connected    1          a-full   auto RJ45
Gi3/2                        connected    1          a-full   auto RJ45
Gi3/3                        connected    1          a-full   auto RJ45

我得到的消息是： *Apr 16 17:36:35.555: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on GigabitEthernet0/1 (not half duplex), with R1 FastEthernet0/0 (half duplex)。

请帮我。

谢谢。