Some parameters about the Cisco router configuration

Single-Arm routing settings

Switch (config-if) #no Switchport

Switch (config) #ip routing
Switch (config) #interface FASTETHERNET0/1
Switch (config-if) #switchport trunk Encapsulation dot1q
Switch (config-if) #exit
Switch (config) #interface VLAN 2
Switch (config-if) #ip address 192.168.2.1 255.255.255.0
Switch (config-if) #exit
Switch (config) #interface VLAN 3

Layer three switch settings

S3 (config) #ip routing to turn on the routing function
S3 (config) #int FA0/5
S3 (Config-if) #no switchport The port enables three-tier routing capability
S3 (Config-if) #ip address 192.168.5.1 255.255.255.0 Configure IP Address
S3 (Config-if) #no shutdown Open port

S2 (config-if) switchport trunk Encapsulation dot1q

S2 (config) #interface VLAN????????????? Enter VLAN 10 interface configuration mode
S2 (config-if) #ip address 192.168.1.254 255.255.255.0

Single 3-layer switch configuration does not partition VLANs

Switch (config) #ip routing

Switch (config) #interface FASTETHERNET0/1
Switch (config-if) #no Switchport
Switch (config-if) #ip address 192.168.3.1 255.255.255.0

Single-line VLAN configuration
Router (config-if) #interface gigabitethernet0/0.1
Router (config-subif) #encapsulation dot1q 2
Router (config-subif) #ip address 192.168.1.1 255.255.255.0

Dhcp

Wanglei (config) #ip DHCP excluded-address 192.168.1.1
Wanglei (config) #ip DHCP pool dhcppool1
Wanglei (dhcp-config) #network 192.168.1.0 255.255.255.0
Wanglei (dhcp-config) #default-router 192.168.1.1
Wanglei (dhcp-config) #dns-server 192.168.1.1
Wanglei (dhcp-config) #dns-server 61.128.114.133

Static NAT
Router (config) #ip nat inside source static 192.168.1.2 192.168.2.3
Router (config) #ip nat inside source static 192.168.1.3 192.168.2.4

Show ip NAT Translations

Router (config) #ip nat pool AAA 192.168.2.20 192.168.2.30 netmask 255.255.255.0
Router (config) #ip nat inside source List 1 pool AAA

Router (config) #access-list 1 Permit 192.168.1.0 255.255.255.0
Router (config) #show IP NAT Translations

Debug IP NAT

Internal 10.1.1.3 Conversion 170.168.2.2

Overload
Router (config) #ip nat pool AAA 192.168.2.1 192.168.2.1 netmask 255.255.255.0
Router (config) #ip nat inside source List 1 Pool AAA overload
Router (config) #access-list 1 Permit 192.168.1.0 0.0.0.255
Router (config) #exit

Do not reload

Router (config) #ip nat pool AAA 192.168.2.5 192.168.2.15 netmask 255.255.255.0
Router (config) #ip nat inside source List 1 pool AAA
Router (config) #access-list 1 Permit 192.168.1.0 0.0.0.255

Some parameters about the Cisco router configuration