I am new in EIGRP, and I used 18 routers with different AS, I have total 6 AS, in first AS router1 and router2 are unable to find network for AS 5 and AS 6, is it problem with hold down timer, what I guess from it entry is not found due to packet is expire for AS 5 and AS 6 so unable to update network in AS 1, please let me know if you need packet tracer file for it, I created bulk network, I am not sure that is practically possible it not but I created worst situation for that network and I got this problem, please let me know if you need more information on it.
Thanks in advance!