EIGRP Troubleshooting Sim

April 4th, 2014 in LabSim

We don’t have enough information about this sim to make a complete solution but here is some information from the candidates about this sim so far:

Topology:

EIGRP_Troubleshooting_Sim.jpg

“NEW EIGRP non-config sim with 6 routers had 4 questions:
1. Why loopback interfaces’ networks from one router do not come to another one via eigrp? weren’t advertised by network command on the 1st router (sh run).
2. Why two routers cannot establish neighbor relationship? weren’t advertised by network command on the 1st router (sh run).
3. Which route will be used for packets to get to R1 from R5? R1 -> R2 (i didn’t have load balancing)
4. Why R1 cannot ping loopback interface IP address 10.5.5.55 on R5? address was not advertised on R5 by network subcommand (sh run).
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The EIGRP non-config sim with 6 routers had 4 questions:
1. Why loopback interfaces’ networks from one router do not come to another one via eigrp? In my case an answer was because they weren’t advertised by network command on the 1st router (sh run).
2. Why two routers cannot establish neighbour relationship? The answer was mismatched K-values (sh ip protocols).
3. Which route will be used for packets to get to R1 from R5? The answer was that the packets will go R1->R2->R5 AND R1->R3->R5 with equal-cost balancing (sh ip route and you’ll see two possible routes to R5 with equal eigrp metric).
4. Why R1 cannot ping loopback interface IP address 10.5.5.55 on R5? The answer was that this address was not advertised on R5 by network subcommand (sh run).
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EIGRP Sim 4 questions embedded.(6 routers and 2 switches). Know your show commands to troubleshoot EIGRP. K-Values, AS, Routing Table etc. Frame-Relay Sim was same concept as Dubai Sim but different locations. Again show commands and frame-relay show commands to troubleshoot
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 the new EIGRP SIM has similar topology to OSPF SIM with 6 Routers the one which is usually asked in ICND1.

1) R4 has loopback routes and these routes are not displayed in R6 — Summary was on
2) R1 cannot ping R5 x.x.x.x address — interface shutdown
3) Which path would R1 take to reach R5 — equal Successor routes
4) R4 and R5 cannot form neighbor relationship — R5 has passive interface enabled.”

Frame Relay Sim

March 2nd, 2014 in LabSim

Question

Enter IOS commands on the Dubai router to verify network operation and answer four multiple-choice questions. THIS TASK DOES NOT REQUIRE DEVICE CONFIGURATION.

Frame_Relay_sim_Topology.jpg

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OSPF Neighbor Sim

January 24th, 2014 in LabSim

We don’t have enough information about this sim to make a complete solution but here is some information from the candidates about this sim so far:

Topology:

OSPF_Neighbor_Sim.jpg

“I was talking about the ICND1 (100-101) exam. The 6 routers are configured with OSPF, however they are not forming adjacencies. You do not have to configure any of them. All you have to do is use the show ip ospf interface command on the routers in question and compare them to see what errors are there. In mine I had one question that was the OSPF area for the two routers were different, another was the router ID were the same for two of the routers, and I had 2 with different Hello and Dead intervals. Understand that OSPF requires areas to match, routers to have different router IDs and hello and dead timers must match, then you will find it easy to find the errors.”
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“The 6 router OSPF sim in which you have to do a show run and compare areas or show ip ospf interface and compare hello and dead timers to troubleshoot adjacency issues. One of the problems between two of the routers is that PPP is configured and the passwords do not match.”
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“There is a question lab (but no conf) of 6 router with 1 switch…the question is only for router about Ospf…4 question: i remember 3 answer, 1 is ppp chap authentication on serial’ 2 is wrong conf area on interface and 3 is 1 router have hello or dead packet but the neighbor router no…i not member more but is easy with show run.”
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“OSPF lab with 6 routers / 1 switch which need to know “-show ip ospf interfaces” command and do some sh run to find incorrect OSPF parameter between 2 routers preventing adjacencies work.”
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“I have the OSPF lab with 6 routers, the questions were router to router config questions. Why they aren’t forming adjacency etc. do show ip OSPF commands to get info. Wrong dead timers/wrong OSPF areas etc are the reasons. Just do your show commands and you’ll be fine. I also had the security applet with one router and one switch. So run to get info about VTY passwords etc. Then I had the config lab with the routers and switches.”
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“Had the OSPF sim, no biggie though, just use your show ip ospf interface command and compare the router interfaces it’s asking for.”
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“u have to enter the “show ip ospf interface” “”show ip ospf database” command and compare every router for “area” “process id” and “hello and dead timer”.
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there is new simulations, i found this questions
1) Between R1 and R2 connected over Ethernet. Why aren’t they forming OSPF adjacency? Answer: One of the interfaces is shutdown.
2) Between R3 and R4 connected over Serial. Why aren’t they forming OSPF adjacency? Answer: One router has PPP Encapsulation and the other is using HDLC.
3) Between R3 and R5 connected over Serial. Why aren’t they forming OSPF adjacency? Answer: On R5 OSFP is not configured to route between them.
4) Between R3 and R6 connected over Serial. Why aren’t they forming OSPF adjacency? Answer: The Hello interval are mismatched.

You can download this sim and practice with Packet Tracer here: http://www.9tut.net/download/9tut.net_OSPF_Neighbor_Initial.pkt.

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Thanks all the candidates for your information! We will continue update this site when we get new information about this sim.

VTP Configuration Sim

June 25th, 2011 in LabSim

Question

A new switch is being added to the River Campus LAN. You will work to complete this process by first configuring the building_2 switch with an IP address and default gateway. For the switch host address, you should use the last available IP address on the management subnet. In addition, the switch needs to be configured to be in the same VTP domain as the building_1 switch and also needs to be configured as a VTP client. Assume that the IP configuration and VTP configuration on building_1 are complete and correct.

The configuration of the router is not accessible for this exercise. You must accomplish the following tasks:

Determine and configure the IP host address of the new switch.
Determine and configure the default gateway of the new switch.
Determine and configure the correct VTP domain name for the new switch.
Configure the new switch as a VTP client.

Note: In the exam, you might be asked to use first, second… available IP address on the management subnet.

VTP_Configuration_Sim_topo.jpg

 

Answer and Explanation

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Nat Sim

June 24th, 2011 in LabSim

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”

ccna_nat_sim_lab1 ccna_nat_sim_lab2

Solution:

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OSPF Sim

June 23rd, 2011 in LabSim

Question

9tut.net 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.

OSPFSim

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: http://www.9tut.net/download/OSPF_Sim_with_Solution.zip. Please say thanks to Renan who shared the files with us!

Answer and Explanation:

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