三层交换机&单臂路由实验
拓扑图1
实验步骤（三层交换机）
1.按照拓扑搭建实验
2.在底下的二层交换机配置,首先创建vlan10和vlan20
[LSW2]vlan 10
[LSW2-vlan10]vlan 20
[LSW2-vlan10]
[LSW2-vlan20]q
3.给各接口配置vlan
[LSW2]int g0/0/1
[LSW2-GigabitEthernet0/0/1]port link-type access
[LSW2-GigabitEthernet0/0/1]port default vlan 10
[LSW2-GigabitEthernet0/0/1]int g0/0/2
[LSW2-GigabitEthernet0/0/2]port link-type access
[LSW2-GigabitEthernet0/0/2]port default vlan 20
[LSW2-GigabitEthernet0/0/2]int g0/0/3
[LSW2-GigabitEthernet0/0/3]port link-type trunk
[LSW2-GigabitEthernet0/0/3]port trunk allow-pass vlan all4.在三层交换机进行配置
[LSW3]vlan 10
[LSW3-vlan10]vlan 20
[LSW3-vlan20]q
[LSW3]int g0/0/1
[LSW3-GigabitEthernet0/0/1]port link-type trunk
[LSW3-GigabitEthernet0/0/1]port trunk allow-pass vlan all
[LSW3-GigabitEthernet0/0/1]q
[LSW3]int vlan10
[LSW3-Vlanif10]ip address 1.1.1.254 24
[LSW3-Vlanif10]int vlanif 20
[LSW3-Vlanif20]ip address 2.2.2.254 24
[LSW3-Vlanif20]q
[LSW3]dis vlan
The total number of vlans is : 3
--------------------------------------------------------------------------------
U: Up; D: Down; TG: Tagged; UT: Untagged;
MP: Vlan-mapping; ST: Vlan-stacking;
#: ProtocolTransparent-vlan; *: Management-vlan;
--------------------------------------------------------------------------------
VID Type Ports
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1 common UT:GE0/0/1(U) GE0/0/2(D) GE0/0/3(D) GE0/0/4(D)
GE0/0/5(D) GE0/0/6(D) GE0/0/7(D) GE0/0/8(D)
GE0/0/9(D) GE0/0/10(D) GE0/0/11(D) GE0/0/12(D)
GE0/0/13(D) GE0/0/14(D) GE0/0/15(D) GE0/0/16(D)
GE0/0/17(D) GE0/0/18(D) GE0/0/19(D) GE0/0/20(D)
GE0/0/21(D) GE0/0/22(D) GE0/0/23(D) GE0/0/24(D)
10 common TG:GE0/0/1(U)
20 common TG:GE0/0/1(U)
VID Status Property MAC-LRN Statistics Description
--------------------------------------------------------------------------------
1 enable default enable disable VLAN 0001
10 enable default enable disable VLAN 0010
20 enable default enable disable VLAN 00205.ping
PC>ping 2.2.2.254
Ping 2.2.2.254: 32 data bytes, Press Ctrl_C to break
From 2.2.2.254: bytes=32 seq=1 ttl=255 time=94 ms
From 2.2.2.254: bytes=32 seq=2 ttl=255 time=47 ms
From 2.2.2.254: bytes=32 seq=3 ttl=255 time=31 ms
From 2.2.2.254: bytes=32 seq=4 ttl=255 time=46 ms
From 2.2.2.254: bytes=32 seq=5 ttl=255 time=63 ms
--- 2.2.2.254 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 31/56/94 ms拓扑图2（单臂路由）
实验步骤
1.按照拓扑图进行ip配置
2.在交换机的各个接口配置vlan
[LSW]vlan 10
[LSW-vlan10]vlan 20 //创建vlan 10和vlan 20
[LSW-vlan20]q[LSW]int g0/0/1
[LSW-GigabitEthernet0/0/1]port link-type access
[LSW-GigabitEthernet0/0/1]port default vlan 10
[LSW-GigabitEthernet0/0/1]int g0/0/2
[LSW-GigabitEthernet0/0/2]port link-type access
[LSW-GigabitEthernet0/0/2]port default vlan 20
[LSW-GigabitEthernet0/0/2]int g0/0/3
[LSW-GigabitEthernet0/0/3]port link-type trunk
[LSW-GigabitEthernet0/0/3]port trunk allow-pass vlan all3.配置路由器：首先使用int g0/0/0.10和*** int g0/0/0.20***将路由器的g0/0/0口分为两个子接口，每个子接口对应一个vlan（单臂路由的定义）
[R1]int g0/0/0.10
[R1-GigabitEthernet0/0/0.10]dot1q termination vid 10 //指定这个子接口和哪个vlan相关联，vid后跟的就是vlan号
[R1-GigabitEthernet0/0/0.10]arp broadcast enable //允许arp广播
[R1-GigabitEthernet0/0/0.10]ip address 1.1.1.254 24 //配置IP地址，同时也是vlan10的网关4.display this查看该接口下配置的命令是否正确
[R1-GigabitEthernet0/0/0.10]dis this
#
interface GigabitEthernet0/0/0.10
dot1q termination vid 10
ip address 1.1.1.254 255.255.255.0
arp broadcast enable
#5.同理，配置g0/0/0.20子接口的命令
[R1-GigabitEthernet0/0/0.20]dot1q termination vid 20
[R1-GigabitEthernet0/0/0.20]arp broadcast enable
[R1-GigabitEthernet0/0/0.20]ip add
[R1-GigabitEthernet0/0/0.20]ip address 2.2.2.254 24
[R1-GigabitEthernet0/0/0.20]display this
#
interface GigabitEthernet0/0/0.20
dot1q termination vid 20
ip address 2.2.2.254 255.255.255.0
arp broadcast enable
#6.Ping
PC>ping 2.2.2.1
Ping 2.2.2.1: 32 data bytes, Press Ctrl_C to break
From 1.1.1.1: Destination host unreachable
From 2.2.2.1: bytes=32 seq=1 ttl=127 time=297 ms
From 2.2.2.1: bytes=32 seq=2 ttl=127 time=94 ms
From 2.2.2.1: bytes=32 seq=3 ttl=127 time=78 ms
From 2.2.2.1: bytes=32 seq=4 ttl=127 time=78 ms
From 2.2.2.1: bytes=32 seq=5 ttl=127 time=78 ms
--- 2.2.2.1 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 78/125/297 ms