LabSim Category

GRE Multilink Sim

October 20th, 2016 46 comments

Refer to the topology below and answer the following questions.


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EIGRP Troubleshooting Sim

April 4th, 2014 120 comments



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OSPF Neighbor Sim

January 24th, 2014 135 comments

The topology below is running OSPF. You are required to troubleshoot and resolve the OSPF issues between the various routers. Use the appropriate show commands to troubleshoot the issues.



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VTP Configuration Sim

June 25th, 2011 510 comments




Answer and Explanation

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Nat Sim

June 24th, 2011 221 comments


A network associate is configuring a router for the TUT company to provide internet access. The ISP has provided the company six public IP addresses of 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 –

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”

+ Use NAT to provide Internet access to all hosts in the company LAN.
+ Name the router TUT
+ Inside global addresses:
+ Inside local addresses: –
+ Numer of inside hosts: 14



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June 23rd, 2011 316 comments

Question company has decided to network three locations to improve efficiency in inventory control. The routers have been named to reflect the location: Boston, Frankfurt, Lancaster.


The necessary networking has been completed at each location, and the routers have been configured with single area OSPF as the routing protocol. The Boston router was recently installed but connectivity is not complete because of incomplete routing tables. Identify and correct any problem you see in the configuration.

Note: The OSPF process must be configured to allow interfaces in specific subnets to participate in the routing process.

You can download this lab and open with Packet Tracer here: Please say thanks to Renan who shared the files with us!

Answer and Explanation:

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