2024-09-03 15:53:00 +08:00
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# 项目实战 - 内网优化
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2024-09-03 16:48:02 +08:00
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2024-09-03 15:53:00 +08:00
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- **需求**
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- 所有部门中都使用了网关冗余技术，为了增强网关稳定性和冗余性
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- 交换机之间存在很多冗余链路，必须防止环路的发生，并且能够提高链路的利用率，要求每个部门的主机访问其他主机时，使用的都是最优的转发路径
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- VLAN30的主机通过SW6与DHCP服务器通信，获取IP地址，所以SW6也是DHCP中继
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### 一、IP、VLAN、Routing
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- **PC**
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- **SW1**
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```
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[SW1]vlan 10
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[SW1-vlan10]quit
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[SW1]int g0/0/1
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[SW1-GigabitEthernet0/0/1]port link-type access
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[SW1-GigabitEthernet0/0/1]port default vlan 10
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[SW1-GigabitEthernet0/0/1]quit
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[SW1]port-group group-member g0/0/2 g0/0/3
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[SW1-port-group]port link-type trunk
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[SW1-port-group]port trunk allow-pass vlan all
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```
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- **SW2**
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```
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[SW2]vlan 20
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[SW2-vlan20]quit
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[SW2]int g0/0/1
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[SW2-GigabitEthernet0/0/1]port link-type access
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[SW2-GigabitEthernet0/0/1]port default vlan 20
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[SW2-GigabitEthernet0/0/1]quit
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[SW2]port-group group-member g0/0/2 g0/0/3
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[SW2-port-group]port link-type trunk
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[SW2-port-group]port trunk allow-pass vlan all
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```
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- **SW3**
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```
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[SW3]vlan 30
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[SW3-vlan30]quit
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[SW3]int g0/0/1
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[SW3-GigabitEthernet0/0/1]port link-type access
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[SW3-GigabitEthernet0/0/1]port default vlan 30
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[SW3-GigabitEthernet0/0/1]quit
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[SW3]port-group group-member g0/0/2 g0/0/3
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[SW3-port-group]port link-type trunk
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[SW3-port-group]port trunk allow-pass vlan all
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```
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- **SW5**
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```
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[SW5]vlan batch 10 20 30 50
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[SW5]port-group group-member g0/0/1 to g0/0/3 g0/0/6
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[SW5-port-group]port link-type trunk
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[SW5-port-group]port trunk allow-pass vlan all
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[SW5-port-group]quit
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[SW5]int g0/0/5
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[SW5-GigabitEthernet0/0/5]port link-type access
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[SW5-GigabitEthernet0/0/5]port default vlan 50
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[SW5-GigabitEthernet0/0/5]quit
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[SW5]int Vlanif 50
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[SW5-Vlanif50]ip add 192.168.50.251 24
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[SW5-Vlanif50]int Vlanif 10
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[SW5-Vlanif10]ip add 192.168.10.251 24
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[SW5-Vlanif10]int Vlanif 20
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[SW5-Vlanif20]ip add 192.168.20.251 24
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[SW5-Vlanif20]int Vlanif 30
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[SW5-Vlanif30]ip add 192.168.30.251 24
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```
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- **SW6**
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```
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[SW6]vlan batch 10 20 30 50
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[SW6]port-group group-member g0/0/1 to g0/0/3 g0/0/6
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[SW6-port-group]port link-type trunk
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[SW6-port-group]port trunk allow-pass vlan all
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[SW6-port-group]quit
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[SW6]int Vlanif 10
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[SW6-Vlanif10]ip add 192.168.10.252 24
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[SW6-Vlanif10]int Vlanif 20
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[SW6-Vlanif20]ip add 192.168.20.252 24
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[SW6-Vlanif20]int Vlanif 30
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[SW6-Vlanif30]ip add 192.168.30.252 24
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[SW6-Vlanif30]int Vlanif 50
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[SW6-Vlanif50]ip add 192.168.50.252 24
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```
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- **AR3 - DHCP**
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```
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[AR3-DHCP]int g0/0/0
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[AR3-DHCP-GigabitEthernet0/0/0]ip add 192.168.50.1 24
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[AR3-DHCP-GigabitEthernet0/0/0]quit
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[AR3-DHCP]ip route-static 0.0.0.0 0 192.168.50.251
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```
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### 二、VRRP
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- **SW5**
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```
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[SW5]int Vlanif 10
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[SW5-Vlanif10]vrrp vrid 10 virtual-ip 192.168.10.254
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[SW5-Vlanif10]vrrp vrid 10 priority 130
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[SW5-Vlanif10]quit
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[SW5]int Vlanif 20
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[SW5-Vlanif20]vrrp vrid 20 virtual-ip 192.168.20.254
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[SW5-Vlanif20]vrrp vrid 20 priority 130
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[SW5-Vlanif20]quit
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[SW5]int Vlanif 30
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[SW5-Vlanif30]vrrp vrid 30 virtual-ip 192.168.30.254
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```
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- **SW6**
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```
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[SW6]int Vlanif 10
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[SW6-Vlanif10]vrrp vrid 10 virtual-ip 192.168.10.254
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[SW6-Vlanif10]int Vlanif 20
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[SW6-Vlanif20]vrrp vrid 20 virtual-ip 192.168.20.254
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[SW6-Vlanif20]int Vlanif 30
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[SW6-Vlanif30]vrrp vrid 30 virtual-ip 192.168.30.254
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[SW6-Vlanif30]vrrp vrid 30 priority 130
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```
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### 三、MSTP
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- **SW1/SW2/SW3/SW5/SW6 统一配置MSTP**
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```
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[SW1]stp region-configuration
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[SW1-mst-region]region-name ntd2407
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[SW1-mst-region]instance 5 vlan 50
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[SW1-mst-region]instance 10 vlan 10
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[SW1-mst-region]instance 20 vlan 20
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[SW1-mst-region]instance 30 vlan 30
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[SW1-mst-region]active region-configuration
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```
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- **HX_SW5是实例10和实例20的主根**
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```
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[SW5]stp instance 5 priority 8192
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[SW5]stp instance 10 priority 4096
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[SW5]stp instance 20 priority 4096
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[SW5]stp instance 30 priority 8192
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```
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- **HX_SW6是实例30和实例5的主根**
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```
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[SW5]stp instance 5 priority 8192
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[SW6]stp instance 10 priority 8192
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[SW6]stp instance 20 priority 8192
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[SW6]stp instance 30 priority 4096
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```
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### 四、DHCP
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- **AR3 - DHCP**
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```
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[AR3-DHCP]dhcp enable
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[AR3-DHCP]ip pool vlan10
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[AR3-DHCP-ip-pool-vlan10]network 192.168.10.0 mask 24
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[AR3-DHCP-ip-pool-vlan10]gateway-list 192.168.10.254
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[AR3-DHCP-ip-pool-vlan10]dns-list 8.8.8.8
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[AR3-DHCP-ip-pool-vlan10]quit
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[AR3-DHCP]ip pool vlan20
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[AR3-DHCP-ip-pool-vlan20]network 192.168.20.0 mask 24
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[AR3-DHCP-ip-pool-vlan20]gateway-list 192.168.20.254
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[AR3-DHCP-ip-pool-vlan20]dns-list 8.8.8.8
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[AR3-DHCP-ip-pool-vlan20]quit
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[AR3-DHCP]ip pool vlan30
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[AR3-DHCP-ip-pool-vlan30]network 192.168.30.0 mask 24
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[AR3-DHCP-ip-pool-vlan30]gateway-list 192.168.30.254
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[AR3-DHCP-ip-pool-vlan30]dns-list 8.8.8.8
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[AR3-DHCP-ip-pool-vlan30]quit
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2024-09-03 17:49:09 +08:00
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[AR3-DHCP]int g0/0/0
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2024-09-03 15:53:00 +08:00
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[AR3-DHCP-GigabitEthernet0/0/1]dhcp select global
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```
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- **SW5 - DHCP中继**
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```
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[SW5]dhcp enable
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[SW5]int Vlanif 10
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[SW5-Vlanif10]dhcp select relay
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[SW5-Vlanif10]dhcp relay server-ip 192.168.50.1
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[SW5-Vlanif10]int Vlanif 20
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[SW5-Vlanif20]dhcp select relay
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[SW5-Vlanif20]dhcp relay server-ip 192.168.50.1
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[SW5-Vlanif20]int Vlanif 30
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[SW5-Vlanif30]dhcp select relay
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[SW5-Vlanif30]dhcp relay server-ip 192.168.50.1
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```
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- **SW6 - DHCP中继**
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```
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[SW6]dhcp enable
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[SW6]int Vlanif 10
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[SW6-Vlanif10]dhcp select relay
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[SW6-Vlanif10]dhcp relay server-ip 192.168.50.1
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[SW6-Vlanif10]int Vlanif 20
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[SW6-Vlanif20]dhcp select relay
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[SW6-Vlanif20]dhcp relay server-ip 192.168.50.1
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[SW6-Vlanif20]int Vlanif 30
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[SW6-Vlanif30]dhcp select relay
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[SW6-Vlanif30]dhcp relay server-ip 192.168.50.1
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```
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### 五、验证
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- 所有PC都可以通过dhcp获取IP地址
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- 所有PC都可以互联互通
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