CCNP ROUTE 300-101 / TSHOOT Practice Exam: More EIGRP

There are plenty of EIGRP questions waiting for you on the ROUTE and TSHOOT exams, not to mention the real world (even though I did just mention it).  Therefore, you need as many EIGRP practice exams as you can get, so let’s get to it!

We’ll use the following Cisco router command output for the first three questions:

P 2.2.2.0/24, 1 successors, FD is 2297856

        via 172.12.123.2 (2297856/128256), Serial0/1/0

        via 172.12.123.3 (2300416/156160), Serial0/1/0

Q1.   From which EIGRP table did I grab this output?

Q2.   The output mentions “1 successors”.   Which of the two routes shown is that successor?

Q3.   Only one of these routes is currently in the EIGRP routing table.  What single command would enable unequal-cost load balancing and put both routes into the routing table while changing no metrics?   A number is involved in this command; use the lowest numeric value possible.

Q4.    Given the information in this illustration, what single command on R1 will allow that router to advertise R2’s loopback back out that same interface?

Q5:  What EIGRP show command resulted in the following output?

EIGRP-IPv4 Traffic Statistics for AS(100)

  Hellos sent/received: 4412/5447

  Updates sent/received: 44/38

  Queries sent/received: 2/5

  Replies sent/received: 5/2

  Acks sent/received: 39/45

Let’s get to those answers right after we chat about your CCNP for just a moment.

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And now.. the answers!   Here’s the table that the first three questions were based upon:

P 2.2.2.0/24, 1 successors, FD is 2297856

        via 172.12.123.2 (2297856/128256), Serial0/1/0

        via 172.12.123.3 (2300416/156160), Serial0/1/0

A1:   That output is from the EIGRP topology table.  You’ll see both successors and feasible successors in there, where the EIGRP routing table holds only successors.  (The third table, the EIGRP neighbor table, holds neither.)

A2:   The successor route is the top one, the one whose metric matches the Feasible Distance shown in the first line.

A3:  The variance command enables EIGRP unequal-cost load balancing, and setting that to 2 with variance 2 will do the job here.  (The default value for variance is 1.)

A4:  We’d need no ip split-horizon eigrp 100 on R1’s serial interface.  Most EIGRP-related commands require you get the AS number in there somewhere!

A5:   That’s the output of show ip eigrp traffic, an often-overlooked troubleshooting command.  It’s an excellent way to see what’s going on with hellos, updates, and EIGRP queries.

That’s it for this exam, but there’s plenty more to come in 2017 — and beyond! — on my CCNP ROUTE and TSHOOT practice exam page!

Chris B.