350-401 · Question #743
Which two statements about the EIGRP Over the Top feature are true? (Choose two.)
The correct answer is C. The neighbor command must be configured with LISP encapsulation on each CE device. F. Traffic is LISP-encapsulated on the data plan.. EIGRP Over the Top (OTP) utilizes LISP encapsulation in the data plane to tunnel EIGRP traffic between customer edge (CE) devices across an IP core. This requires explicit neighbor commands with LISP encapsulation configured on CE devices to establish EIGRP peering.
Question
Which two statements about the EIGRP Over the Top feature are true? (Choose two.)
Options
- AEIGRP routers traffic between the PE devices.
- BTraffic is LISP-encapsulated on the control plan.
- CThe neighbor command must be configured with LISP encapsulation on each CE device.
- DThe network statement must be configured on each PE device to connect separate EIGRP sites.
- EThe network statement must be configured on each CE device to connect separate EIGRP sites.
- FTraffic is LISP-encapsulated on the data plan.
How the community answered
(43 responses)- A5% (2)
- B2% (1)
- C91% (39)
- D2% (1)
Why each option
EIGRP Over the Top (OTP) utilizes LISP encapsulation in the data plane to tunnel EIGRP traffic between customer edge (CE) devices across an IP core. This requires explicit `neighbor` commands with LISP encapsulation configured on CE devices to establish EIGRP peering.
EIGRP OTP extends EIGRP between CE devices across a provider core, not for EIGRP routers to traffic between PE devices.
While LISP has a control plane, the encapsulation of EIGRP traffic in EIGRP OTP primarily occurs in the data plane, not the control plane.
For EIGRP OTP, CE devices must explicitly establish EIGRP neighbor relationships over the LISP tunnel, requiring configuration of the `neighbor` command with LISP encapsulation on each CE device to ensure EIGRP routing information exchange.
EIGRP `network` statements are configured on CE devices to advertise routes, not typically on PE devices for connecting separate EIGRP sites, as PEs handle the LISP mapping and forwarding.
Although `network` statements are configured on CEs, the explicit `neighbor` command with LISP encapsulation is the defining mechanism for establishing EIGRP OTP peering over the LISP tunnel, making this option less precise than C and F.
The EIGRP Over the Top feature leverages LISP to encapsulate the EIGRP data traffic in the data plane, allowing EIGRP packets to be transported as LISP encapsulated packets across the underlay network.
Concept tested: EIGRP Over The Top (OTP) with LISP
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe-3s/ire-xe-3s-book/ire-eigrp-otp.html
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