Students came back and the other day at our institution and ever since then for the past three days one of our VLANS are not communicating with the dhcp server. Students connect to a SSID and are supposed to authenticate through Aruba Clearpass, but with this problem a ton of students are trying to jump on to the VLAN that isn't working. We've turned on DHCP snooping and looked into ARP snooping as well, but we're coming up short. We've activated a port in our office and tagged it for the VLAN, and connected to it and ran Wireshark, but we're not getting DHCP ACK, NAK or even Offer requests. We disabled one of our Aruba controllers yesterday and it kicked off the device, but today they came back on a different VLAN and it isn't working, so we have no clue where to look to trace what's causing our issue.
Any help or suggestions to help trace would be great. We're running Extreme switches, with a Palo Alto firewall and using Aruba for wireless.
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