CCIE™ Challenge Question

This week's question

Which of the following are methods of avoiding EIGRP-related congestion in an NMBA network with a large number of neighbors?
(Choose 2)

a) Increase the hello timer

b) Increase the hold timer

c) Increase the congestion timer

d) Use point-to-point subinterfaces with varying hello timers

Answer
a) Increase the hello timer

d) Use point-to-point subinterfaces with varying hello timers

Explanation
Increasing the hello timer lessens the number of hello packets sent out per interval. Using point-to-point subinterfaces with varying hello timers also helps because it relieves the burst of traffic that can occur with one fixed hello interval -- instead it spreads it out. Increasing the hold time does not decrease the traffic, and there is no such thing as a congestion timer.
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