EIGRP Troubleshooting Sim

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.”

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