How NAT configures address translation

First step ：ACL The rules

1. Carry out orders system-view, Enter the system view .
2. Carry out orders acl number 2000/3000  Use the number to create a ACL, And enter ACL View .
3. Configure basic according to the actual situation ACL Rules or advanced ACL The rules , basic ACL 2000~2999 senior ACL3000~3999

 

The second step ： Configure the address association of the interface

1. Carry out orders system-view, Enter the system view .
2. Configure the address association of the interface , The user selects one of the configuration methods according to the actual situation . Configure... With address pool NAT Outbound: Carry out orders nat address-group 1 start-address end-address, Configure the public address pool . Carry out orders interface g0/0/0, Enter the interface or sub interface view . Carry out orders nat outbound acl-number address-group 1 [ no-pat ], Configure... With address pool NAT Outbound. Configure without address pool Easy IP: Carry out orders interface g0/0/0, Enter the interface or sub interface view . Carry out orders nat outbound acl-number [ interface interface-type interface-number [ .subnumber ] ] [ vrrp vrrpid ], To configure Easy IP.

Verify configuration results

stay Router Carry out the order display nat outbound, View the address translation results .

NAT What are the common configuration errors ？

Common cases of configuration errors , Avoid introducing faults in the configuration phase .

1. The intranet host cannot access the Internet （NAT Outbound The fault phenomenon ）

2. The intranet host cannot access the Internet （NAT Outbound The fault phenomenon ）

3. Hosts with overlapping intranet and Internet addresses cannot access the Internet （ two NAT The fault phenomenon ）