EIGRP VRF-Lite Configuration in Named Mode

Configure and verify VRF-Lite

Answer Correct answer: D — Configure EIGRP named mode by defining the process name first, then specifying the autonomous-system and network statements within the address-family ipv4 vrf Science block.

Refer to the exhibit. [sampleXML/xmlfile-329_1.png] The IT router has been configured with the Science VRF and the interfaces have been assigned to the VRF. Which set of configurations advertises Science-1 and Science-2 routes using EIGRP AS 111?

router eigrp 111 address-family ipv4 vrf Science autonomous-system 1 network 192.168.1.0 network 192.168.2.0
router eigrp 111 address-family ipv4 vrf Science network 192.168.1.0 network 192.168.2.0
router eigrp 111 network 192.168.1.0 network 192.168.2.0
router eigrp 1 address-family ipv4 vrf Science autonomous-system 111 network 192.168.1.0 network 192.168.2.0 Correct Answer

Community Insight

The question tests the ability to correctly structure EIGRP commands when operating in named mode with VRFs, specifically avoiding the common trap of mixing classic AS numbers with named mode address-family statements.

This page explains the correct EIGRP configuration for advertising routes within a specific VRF using named mode syntax, highlighting the distinction between classic and named configuration structures.

Many learners select option A or B, mistakenly believing that 'router eigrp 111' defines the Autonomous System number even when 'address-family' is present, or they fail to recognize that the AS number must be defined inside the address-family block in named mode.

Community Discussion (18 comments)

Luongchacha1 👍 1 Selected: B

B is correct. you guy should read EIGRP Named Mode Configuration --> D is EIGRP Named Mode, but router eigrp 1 --> classic mode not named mode.

5f44e95 👍 1 Selected: C

I think the answer is C. The advertisement of the routes should be from science-1 and science-2 routers. And these routers need not be aware of the VRF configs on the IT router.

tubirubs 👍 2 Selected: D

D is the correct answer.

bk989 👍 2

exactly I just labbed this. We can't do router eigrp 111 because we can't set the vrf autonomous-system to 111 IOU1(config-router)#router eigrp 111 IOU1(config-router)#address-family ipv4 vrf Science autonomous-system 111 %ERROR: AS(111) in use by classic router

Chiaretta 👍 2 Selected: D

D is the correct answer AS must be 111

inteldarvid 👍 2 Selected: D

sorry my anwser before was wrong. Th e option correct is "D". I test in my lab

Pietjeplukgeluk 👍 2

Indeed, it is D, i was checking many documentation. If you create a EIGRP process with "router eigrp 1" then for the global/default VRF the AS is actually 1. The question in this case is have the AS set for another VRF, so this is set by "autonomous-system 111" under " address-family ipv4 vrf Science". Some example: https://netcraftsmen.com/using-vrf-lite-eigrp-and-static-routes/

inteldarvid 👍 1 Selected: A

100% answer correct "A"

6dd4aa0 👍 3

Why can Answer A be right too?

Cyril_the_Squirl 👍 1

A & D are perfectly correct....the question does require you to use AS 111, making D correct.

Almylle 👍 1

Because the question asks for AS 111, not the process

forccnp 👍 3 Selected: D

D is correct answer

Typovy 👍 2

Just labbed it, if you will use answer B commands the AS for the vrf will be '0'. D is correct asnwer

bolbolskanes 👍 15

D is the correct answer. please correct in EIGRP named mode R1(config)#router eigrp TEST ( 1 or 111 is just a name) Cisco wanna trick us to make money

ChillingAgain 👍 4 Selected: D

VRF-Lite for EIGRP using classic mode config.

Huntkey 👍 3 Selected: D

I like D too

jarz 👍 3 Selected: D

Ans = D

lisanta12 👍 2

D is answer

Comments & Corrections

No comments yet — spotted an error or have a note? Share it below.

Expert Analysis

Why the Answer Is Correct

Option D is the correct configuration because it adheres to Cisco's EIGRP named mode syntax. In named mode, the process name (e.g., '1') is assigned via router eigrp 1, and the Autonomous System number (111) is explicitly defined within the address-family ipv4 vrf Science block using the autonomous-system 111 command. This structure allows multiple VRFs to share the same EIGRP process while maintaining distinct AS numbers per VRF if needed.

Why the Other Options Are Wrong

Options A, B, and C attempt to use classic mode syntax (router eigrp 111) but then incorrectly mix in address-family blocks or omit necessary components. Specifically, Option A tries to set the autonomous system inside the address-family while also using the classic router command, which causes conflicts or errors as noted by community members. Option C uses pure classic mode without VRF context, failing to advertise into the Science VRF. Option B lacks the explicit autonomous-system definition required in the address-family block for proper operation in this context.

Community Comment Notes

Community consensus strongly supports Option D. Users like 'bolbolskanes' and 'ChillingAgain' confirmed that D is correct because EIGRP named mode requires the process name to be separate from the AS number. One user ('bk989') highlighted a critical technical detail: attempting to use router eigrp 111 followed by an address-family with the same AS can result in an error if the AS is already in use by a classic instance, reinforcing why the named mode structure in D is the robust and correct approach.

Exam Strategy

Always distinguish between EIGRP Classic and Named modes. In Named mode, remember that the process name is arbitrary, and the Autonomous System number is configured under the address-family statement, not the initial router command.

Frequently Asked Questions

Why can't I use 'router eigrp 111' with address-family?

In named mode, the number after 'router eigrp' is just a process name. The actual Autonomous System number must be defined inside the address-family block to avoid conflicts and ensure correct VRF routing.

What is the difference between classic and named EIGRP config here?

Classic mode uses 'router eigrp <AS>' directly. Named mode separates the process name and AS number, allowing more granular control over VRFs and address families, as shown in option D.

More 300-410 FAQ →

Related Analysis

Practice All 300-410 Questions

Access 159 questions with complete answers and detailed explanations.

View Full 300-410 Practice Test →

← Back to 300-410 Study Guide