How EIGRP protects from route flapping?

johnifanx98

In RIP, I know it's hold down timer, which prevents excessive update due to the up and down. In EIGRP, it seems like no such a mechanism. Then, would it cause flooding of updates when flapping happens?

Dan-Humphreys

I'm guessing the flapping port would not be sending hello packets so the hold timer would expire and DUAL would calculate another route

kohr-ah

EIGRP has hold timers as well
you set hello and hold times via
ip hello-interval eigrp 'asn' seconds (#ip hello-interval eigrp 90 30)
and hold timers via ip hold-time eigrp 'asn' seconds (#ip hold-time eigrp 90 90)

networker050184

It's a little different with the other IGPs as Dan-Humphreys pointed out. You have neighbors formed and route queries which are a better mechanism to ensure routing info is up to date.