Which of the following is true regarding the effect of EIGRP queries on the network design?
A.
EIGRP queries will be the most significant issue with respect to stability and convergence
B.
EIGRP queries are not a consideration as long as EIGRP has a feasible successor with a next hop AD that is greater than the FD of the current successor route
C.
EIGRP queries will only increase the convergence time when there are no EIGRP stubs designed in the network
Explanation:
22
Cisco 642-874 Exam
The correct answer is A although C isn’t wrong!
P111 of Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide: (CCDP ARCH 642-874), Third Edition.
One of the biggest stability and convergence issues with EIGRP is the propagation of EIGRP queries. When
EIGRP does not have a feasible successor, it sends queries to its neighbors. The query tells the neighbor, “I do
not have a route to this destination any more; do not route through me. Let me know if you hear of a viable alternative route.” The router has to wait for replies to all the queries it sends. Queries can flood through many
routers in a portion of the network and increase convergence time. Summarization points and filtered routes
limit EIGRP query propagation and minimize convergence time.
There is inconsistency on the answer A
whereby the A says “A.
EIGRP queries will be the most significant issue with respect to stability and convergence”
but actually the queries propagation is the actually significant.
EIGRP queries will be the most significant issue with respect to stability and convergence