On my way to recreating an EIGRP scenario in one of my BSCI textbooks, I have R2 and R4 connected to each other via a 1MB back-to-back serial link, 18.104.22.168/30 (R2 is .1; R4 .2).
R2 has a whole slew of 24-bit loopbacks configured; and what's weird to me is that all of them are showing up as specific 24-bit networks in R4's routing table. Auto-summary has NOT been disabled on either router.
So am I misunderstanding something here; shouldn't the one 16-bit network 22.214.171.124 be the only one visible to R4, without the no auto-summary command configured?
auto summary is triggered by a change of major network.
That is until you are within net 126.96.36.199 is legitimate and correct to see these specific routes.
change the link between the two devices in something not belonging to the same class B network and you will see the difference.
Hope to help