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300-320 · Question #209

Which of the following is true regarding the effect of EIGRP queries on the network design?

The correct answer is A. EIGRP queries will be the most significant issue with respect to stability and convergence. Uncontrolled EIGRP query propagation is the dominant threat to stability and convergence in large EIGRP networks.

Advanced Addressing and Routing Solutions

Question

Which of the following is true regarding the effect of EIGRP queries on the network design?

Options

  • AEIGRP queries will be the most significant issue with respect to stability and convergence
  • BEIGRP queries are not a consideration as long as EIGRP has a feasible successor with a next
  • CEIGRP queries will only increase the convergence time when there are no EIGRP stubs designed

How the community answered

(44 responses)
  • A
    70% (31)
  • B
    11% (5)
  • C
    18% (8)

Why each option

Uncontrolled EIGRP query propagation is the dominant threat to stability and convergence in large EIGRP networks.

AEIGRP queries will be the most significant issue with respect to stability and convergenceCorrect

When a route is lost and no feasible successor exists, EIGRP sends queries to all neighbors; if those queries propagate unchecked across a large network, routers can enter a Stuck-in-Active (SIA) state waiting for replies, causing route flaps and extended convergence times that represent the most significant stability risk in EIGRP network design.

BEIGRP queries are not a consideration as long as EIGRP has a feasible successor with a next

Feasible successors prevent queries only locally on the router that holds them; queries can still propagate beyond neighbors that lack a feasible successor, so the query scope problem remains even with feasible successors present.

CEIGRP queries will only increase the convergence time when there are no EIGRP stubs designed

EIGRP stubs reduce query scope but are a mitigation technique, not an elimination of the problem; the statement incorrectly implies queries only matter when stubs are absent and ignores the broader convergence impact.

Concept tested: EIGRP query propagation and Stuck-in-Active impact on design

Source: https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/13676-19.html

Topics

#EIGRP queries#query propagation#convergence#stub routing

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