Can we make sure uplink port of the Juniper EX3300s is not flapping (up/down).
Please try disabling STP on the specific port to see if that makes a difference.
Do we get any errors on the core switch or on Juniper EX3300s with regards to BPDU filter messages ?
IAP console doesn`t tell the root cause for why it drops the ip address.
To further isolate, we could also configure static parameters to the IAP to see if it comes up.
For eg:-
apboot> Setenv ipaddr 1.1.1.2
apboot> setenv netmask 255.255.255.0
apboot> setenv gatewayip 1.1.1.1
apboot> setenv domainname WLANQA.com
apboot> setenv dnsip 1.1.1.1
apboot> save
Thanks for captures. I could see only "discover" packets for Instant AP`s mac address
(24:de:c6:c5:8d:f4). Not sure if the DHCP discover reaches the DHCP server or not at point of time?
May I know the lease time configured on the server please?
Thank you.