CCNA Complete Guide 2nd Edition.pdf - Cisco Learning Home

Chapter 18
Network Address Translation Lab
Static NAT Configuration
Figure 18-1: Network Setup for NAT
- Static NAT requires the fewest configuration steps as compared to other NAT implementations.
Each interface needs to be identified as either an inside or outside interface with the ip nat
{inside | outside} interface subcommand, as well as the configuration for static mapping
between each pair of inside local and inside global addresses. Only packets arriving on an inside
or outside NAT interface are subject for translation.
- Static NAT configuration on NAT:
PC1
172.16.1.2
E0/0 E0/1
172.16.1.1 200.1.1.254
NAT
PC2
172.16.1.3
NAT#conf t
Enter configuration commands, one per line. End with CNTL/Z.
NAT(config)#int e0/0
NAT(config-if)#ip nat inside
NAT(config-if)#int e0/1
NAT(config-if)#ip nat outside
NAT(config-if)#exit
NAT(config)#ip nat inside source static 172.16.1.2 200.1.1.2
NAT(config)#ip nat inside source static 172.16.1.3 200.1.1.3
NAT(config)#^Z
NAT#
NAT#sh ip nat translations
Pro Inside global Inside local Outside local Outside global
--- 200.1.1.2 172.16.1.2 --- ---
--- 200.1.1.3 172.16.1.3 --- ---
NAT#
NAT#sh ip nat statistics
Total active translations: 2 (2 static, 0 dynamic; 0 extended)
Outside interfaces:
Ethernet0/1
Inside interfaces:
Ethernet0/0
Hits: 0 Misses: 0
Expired translations: 0
Dynamic mappings:
NAT#
131
ServerA
200.1.1.200
Inside Outside
Copyright © 2008 Yap Chin Hoong
yapchinhoong@hotmail.com