This page was exported from Free Cisco Training & Resources - Certification Exam Preparation [ https://www.ciscobibles.com ] Export date:Fri Mar 14 13:27:24 2025 / +0000 GMT ___________________________________________________ Title: CCNA ICND2 640-816 Lab – NAT Simulator Question --------------------------------------------------- A network associate is configuring a router for the weaver company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30. The following have already been configured on the router： - The basic router configuration - The appropriate interfaces have been configured for NAT inside and NAT outside - The appropriate static routes have also been configured (since the company will be a stub network, no routing protocol will be required.) - All passwords have been temporarily set to "cisco" The company has 14 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29. Therefore we have to use NAT overload (or PAT) Double click on the Weaver router to open it Router>enable Router#configure terminal First you should change the router's name to Weaver Router(config)#hostname Weaver Create a NAT pool of global addresses to be allocated with their netmask. Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248 Create a standard access control list that permits the addresses that are to be translated Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15 Establish dynamic source translation, specifying the access list that was defined in the prior step Weaver(config)#ip nat inside source list 1 pool mypool overload This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110) Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements. This is how to configure the NAT inside and NAT outside, just for your understanding: Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside Weaver(config-if)#exit Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end Finally, we should save all your work with the following command: Weaver#copy running-config startup-config Check your configuration by going to "Host for testing" and type: C:>ping 192.0.2.114 The ping should work well and you will be replied from 192.0.2.114 --------------------------------------------------- Images: http://www.9tut.net/images/ICND2/Labsim/ccna_nat_sim_lab1.jpg http://www.9tut.net/images/ICND2/Labsim/ccna_nat_sim_lab2.jpg --------------------------------------------------- --------------------------------------------------- Post date: 2010-08-11 19:01:29 Post date GMT: 2010-08-11 11:01:29 Post modified date: 2010-08-11 19:01:29 Post modified date GMT: 2010-08-11 11:01:29 ____________________________________________________________________________________________ Export of Post and Page as text file has been powered by [ Universal Post Manager ] plugin from www.gconverters.com