交换机与生成树简单问题配置
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1 交换机与生成树简单问题配置
S1(config)#
S1(config)#int fa0/1
S1(config-if)#description 1st connection to core switch 一些提示信息
S1(config-if)#int fa0/2
S1(config-if)#description 2nd connection to core switch
S1(config-if)#int fa0/8
S1(config-if)#description connection to IVR
S1(config-if)#int lo 3
S1(config-if)#description connection to HostA
S1(config-if)#int lo 4
S1(config-if)#description connection to Phone A
S1(config-if)#line con 0
S1(config-line)#password console
S1(config-line)#login
S1(config-line)#exit
S1(config)#line vty 0 4
S1(config-line)#password telnet
S1(config-line)#login
S1(config-line)#int vlan 1
S1(config-if)#ip add 192.168.10.17 255.255.255.240 交换机配地址在vlan 1 下
S1(config-if)#no shut
S1(config-if)#exit
S1(config)#banner motd #This is the S1 switch# 一些提示信息 2 S1(config)#exit
S1#copy run start
S2(config)#enable secret todd
S2(config)#int fa0/1
S2(config-if)#description 1st connection to core
S2(config-if)#int fa0/2
S2(config-if)#description 2nd connection to core
S2(config)#int lo 3
S2(config-if)#description connection to HostB
S2(config-if)#int lo 4
S2(config-if)#description connection to PhoneB
S2(config-if)#line con 0
S2(config-line)#password console
S2(config-line)#login
S2(config-line)#exit
S2(config)#line vty 0 4
S2(config-line)#password telnet
S2(config-line)#login
S2(config-line)#exit
S2(config)#int vlan 1
S2(config-if)#ip add 192.168.10.18 255.255.255.240
S2(config-if)#no shut
S2(config-if)#exit
S2(config)#banner motd #This is my S2 Switch#
S2(config)#exit
S2#copy run start
S2#ping 192.168.10.17
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.17, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 28/40/76 ms
S2#
core(config)#enable secret todd
core(config)#int fa0/5
core(config-if)#description 1st connection to S2
core(config-if)#int fa0/6
core(config-if)#description 2nd connection to S2 3 core(config-if)#int fa0/7
core(config-if)#description 1st connection to S1
core(config-if)#int fa0/8
core(config-if)#description 2nd connection to S1
core(config-if)#lin con 0
core(config-line)#password console
core(config-line)#login
core(config-line)#exit
core(config)#line vty 0 4
core(config-line)#password telnet
core(config-line)#login
core(config-line)#exit
core(config)#int vlan 1
core(config-if)#ip add 192.168.10.19 255.255.255.240
core(config-if)#no shut
core(config-if)#exit
core(config)#banner motd #This is the core Switch #
core(config)#exit
core#copy run start
core#ping 192.168.10.17
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.17, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 24/66/104 ms
core#ping 192.168.10.18
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.18, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 20/59/104 ms
core#show ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.10.18 0 cc00.0290.0000 ARPA Vlan1
Internet 192.168.10.19 - cc00.0d3c.0000 ARPA Vlan1
Internet 192.168.10.17 0 cc00.08a0.0000 ARPA Vlan1
core#
core#config t
core(config)#ip default-gateway 192.168.10.30
core(config)#exit
core#
4
端口安全 3550
()#int range fa0/3 - 4
Switchport port-security maximun 1
Switchport port-security mac-address sticky
Switchport port-security violation shutdown
Exit
Portfast
()#int range fa0/3 – 4
Spanning-tree portfast
BPDU护卫
BPDU过滤器（防止PORTFAST产生的不良影响）
Spanning-tree bpduguard enable (接上面)
Spanning-tree bpdufilter enable
Spanning-tree mode rapid-pvst (开启快速生成树)用（show spanning-tree查看）
EtherChannel
S1上
()#int port-channel 1 开启隧道1
Int range fa0/1 – 2
Switchport trunk en dot1q
Switchport mode trunk 封装dot1q起trunk
Switchport nonegotiate 关闭自动协商
Channel-group 1 mode desirable 应用
Do show int fa0/1 etherchannel
在另一面的两个接口也同样处理
