Cisco 2901 Configuring Dial-Up Networking

1. Enter EN, then enter the password to confirm and press conf t
2, Router (config) # VPDN enable
Interface Dialer 1//Enter dialer 1
3, Router (config-if) # Encapsulation PPP//Package PPP protocol
IP add negotiated//enable IP negotiation
PPP Authentication CHAP
PPP Authentication CHAP callin//closed CHAP authentication
PPP chap hostname [EMAIL protected]//[email protected] for telecom account
PPP chap password G0203344500//G0203344500 as account password
Dialer Pool 1
IP NAT outside//identified as Nat out port
No shutdown
Interface GIGABITETHERNET0/1
Pppoe-client Dial-pool-number 1
IP Nat Outside
No shutdown
Interface gigabitethernet0/0
IP add 172.16.0.1 255.255.255.0//Here I set the IP field: 172.16.0.1
IP nat inside//OK for NAT in Port
No shutdown
Do show IP int b//After running this command, if the IP address has been obtained, it proves that the configuration is in effect
Exit
4, let the Intranet host (172.16.0.1/24) host can communicate with the external network
Router (config) # access-list 1 Permit 172.16.0.0 0.0.0.255//Set reverse subnet mask here, Atomic netmask is 255.255.255.0
IP nat inside source list 1 Interface dialer 1 overload//new NAT makes 172.16.0.0 segment Host converted to dialer 1 address out
IP route 0.0.0.0 0.0.0.0 Dia 1
Interface Dialer1
IP MTU 1452
IP TCP ADJUST-MSS 1452
Interface gigabitethernet0/0
Duplex Auto
Speed auto
Exit
router# Write
Copy running-config Startup-config//These two commands are save configuration commands

Reload//Restart the router, ask whether to save the configuration, press Yes to complete this step, you can surf the internet

5. Exclude DHCP-assigned IP:
IP dhcp excluded-address 172.16.0.2 172.16.0.100//DHCP assigning addresses when you exclude these IPs
IP dhcp excluded-address 172.16.0.202 172.16.0.254


6. DHCP Server settings:
Router (config) # ip DHCP pool test//test here is the DHCP name
Network 172.16.0.0 255.255.255.128
Default-router 172.16.0.1
Dns-server 202.96.134.33 202.96.166.86

Ps:dhcp to set the excluded IP to add the allowed IP segment, otherwise the IP segment does not take effect, if you want to delete DHCP, run the command: No IP DHCP pool test can be

Cisco 2901 Configuring Dial-Up Networking