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用三层交换机构建小型网络

用三层交换机构建小型网络
启用（交换机的路由功能）

Switch 0 的配置：

Press RETURN to get started!

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up %LINK-5-CHANGED: Interface FastEthernet0/2, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up Switch>enable
Switch#configure terminal
Enter configuration commands, one per line.End with CNTL/Z.
Switch(config)#interface fastEthernet 0/1
Switch(config-if)#no switchport

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Switch(config-if)#ip address 1.1.1.1 255.0.0.0
Switch(config-if)#no shutdown
Switch(config-if)#exit 【用三层交换机构建小型网络】
Switch(config)#interface fastEthernet 0/2
Switch(config-if)#no switchport

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up Switch(config-if)#
Switch(config-if)#ip address 3.3.3.1 255.0.0.0
Switch(config-if)#no shutdown
Switch(config-if)#exit
Switch(config)#ip rout?
routerouting
Switch(config)#ip routing
Switch(config)#ip route 2.0.0.0 255.0.0.0 ?
A.B.C.DForwarding router's address
EthernetIEEE 802.3
FastEthernetFastEthernet IEEE 802.3
GigabitEthernetGigabitEthernet IEEE 802.3z
LoopbackLoopback interface
NullNull interface
SerialSerial
VlanCatalyst Vlans
Switch(config)#ip route 2.0.0.0 255.0.0.0 fastEthernet 0/2
Switch(config)#exit
%SYS-5-CONFIG_I: Configured from console by console
Switch#show ip rout
Switch#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

C1.0.0.0/8 is directly connected, FastEthernet0/1
S2.0.0.0/8 is directly connected, FastEthernet0/2
C3.0.0.0/8 is directly connected, FastEthernet0/2
Switch#ping 2.2.2.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 62/62/63 ms

Switch#show r
Switch#show running-config
Building configuration...

Current configuration : 1181 bytes
!
version 12.2
no service password-encryption
!
hostname Switch
!
!
ip routing
!
!
!
!
ip ssh version 1
!
port-channel load-balance src-mac
!
interface FastEthernet0/1
no switchport
ip address 1.1.1.1 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/2
no switchport
ip address 3.3.3.1 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 2.0.0.0 255.0.0.0 FastEthernet0/2
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
end


Switch#



Switch1 配置：

Press RETURN to get started!

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up %LINK-5-CHANGED: Interface FastEthernet0/2, changed state to up %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up Switch>enable
Switch#configure terminal
Enter configuration commands, one per line.End with CNTL/Z.
Switch(config)#interface fastEthernet 0/1
Switch(config-if)#no switchport

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up Switch(config-if)#
Switch(config-if)#ip address 2.2.2.1 255.0.0.0
Switch(config-if)#no shutdown
Switch(config-if)#exit
Switch(config)#interface fastEthernet 0/2
Switch(config-if)#no switchport

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up Switch(config-if)#
Switch(config-if)#ip address 3.3.3.2 255.0.0.0
Switch(config-if)#no shutdown
Switch(config-if)#exit
Switch(config)#ip routing
Switch(config)#ip route 1.0.0.0 255.0.0.0 ?
A.B.C.DForwarding router's address
EthernetIEEE 802.3
FastEthernetFastEthernet IEEE 802.3
GigabitEthernetGigabitEthernet IEEE 802.3z
LoopbackLoopback interface
NullNull interface
SerialSerial
VlanCatalyst Vlans
Switch(config)#ip route 1.0.0.0 255.0.0.0 ?
A.B.C.DForwarding router's address
EthernetIEEE 802.3
FastEthernetFastEthernet IEEE 802.3
GigabitEthernetGigabitEthernet IEEE 802.3z
LoopbackLoopback interface
NullNull interface
SerialSerial
VlanCatalyst Vlans
Switch(config)#ip route 1.0.0.0 255.0.0.0 fastEthernet 0/2
Switch(config)#no shut
Switch(config)#exit
%SYS-5-CONFIG_I: Configured from console by console
Switch#show ip rout
Switch#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route

Gateway of last resort is not set

S1.0.0.0/8 is directly connected, FastEthernet0/2
C2.0.0.0/8 is directly connected, FastEthernet0/1
C3.0.0.0/8 is directly connected, FastEthernet0/2
Switch#ping 1.1.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 62/62/63 ms

Switch#show int
Switch#show interfaces f
Switch#show interfaces fastEthernet 0/1
FastEthernet0/1 is up, line protocol is up (connected)
Hardware is Lance, address is 0090.2b2c.9e01 (bia 0090.2b2c.9e01)
MTU 1500 bytes, BW 100000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
input flow-control is off, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:08, output 00:00:05, 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
956 packets input, 193351 bytes, 0 no buffer
Received 956 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
2357 packets output, 263570 bytes, 0 underruns
0 output errors, 0 collisions, 10 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Switch#show r
Switch#show running-config
Building configuration...

Current configuration : 1181 bytes
!
version 12.2
no service password-encryption
!
hostname Switch
!
!
ip routing
!
!
!
!
ip ssh version 1
!
port-channel load-balance src-mac
!
interface FastEthernet0/1
no switchport
ip address 2.2.2.1 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/2
no switchport
ip address 3.3.3.2 255.0.0.0
duplex auto
speed auto
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9
!
interface FastEthernet0/10
!
interface FastEthernet0/11
!
interface FastEthernet0/12
!
interface FastEthernet0/13
!
interface FastEthernet0/14
!
interface FastEthernet0/15
!
interface FastEthernet0/16
!
interface FastEthernet0/17
!
interface FastEthernet0/18
!
interface FastEthernet0/19
!
interface FastEthernet0/20
!
interface FastEthernet0/21
!
interface FastEthernet0/22
!
interface FastEthernet0/23
!
interface FastEthernet0/24
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 1.0.0.0 255.0.0.0 FastEthernet0/2
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
end


Switch#

主机 pc0 上 pingpc1 :

Packet Tracer PC Command Line 1.0 PC>ping 2.2.2.2
Pinging 2.2.2.2 with 32 bytes of data:
Reply from 2.2.2.2: bytes=32 time=80ms TTL=126 Reply from 2.2.2.2: bytes=32 time=94ms TTL=126 Reply from 2.2.2.2: bytes=32 time=93ms TTL=126 Reply from 2.2.2.2: bytes=32 time=93ms TTL=126
Ping statistics for 2.2.2.2: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 80ms, Maximum = 94ms, Average = 90ms
PC>tracert 2.2.2.2
Tracing route to 2.2.2.2 over a maximum of 30 hops:
132 ms31 ms31 ms1.1.1.1 263 ms63 ms63 ms3.3.3.2 394 ms78 ms93 ms2.2.2.2
Trace complete.
PC>



注意：在三层交换机上启动“路由”功能，应该有静态路由。
转载于:https://blog.51cto.com/zhiduan/162469

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