Cannot pull IP addresses on Engenius Neutron switch

I have an Engenius Neutron EWS5912FP wireless controller/switch that I am trying to configure three vlans on.  The Engenius switch is connected to a Cisco SG220 layer 2 switch which is connected to a Cisco SG300 layer 3 switch.  The vlans are set up to pull DHCP addresses from the SG300.  The ports on the SG220 are configured to pass the vlans and other devices are able to get IP addresses from the SG300.  However, the Engenius switch and the attached WAPs are unable to pull IP addresses from the SG300.  Several of us have looked at the configuration and cannot see anything out of order.

Does anybody have direct experience in a similar configuration of Engenius and Cisco devices?
Ken HerrIT DirectorAsked:
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F PCommented:
What do the ARP tables look like, and did you try matching the MAC to IP from the output of a grep or show command?
F PCommented:
You need to make sure that you're advertising the DHCP relay from VLAN to VLAN if there is no DHCP server broadcasting on that broadcast domain. The request won't know where to relay since the subnet doesn't have the forwarder, but your other issue could be that the trunk itself on the Engenius device doesn't recognize the dot1q trunking that your Cisco is setup by default to use, since it's a Cisco proprietary protocol, and you need to reconfigure the trunk port on that specific device to use ISL, but you would have to know whether or not that's the issue before you even get that far. Start with the DHCP relay or if you think it has an address and don't know it, the ARP tables.

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F PCommented:
Ohhhh, and that you have an ACL which allows the communication on the router between the trunked VLANs.
Ken HerrIT DirectorAuthor Commented:
We have been in contact with Engenius tech support and they are unable to identify the cause of this issue.  All of the above comments are appreciated.

Thank you
Ken HerrIT DirectorAuthor Commented:
my own comment was just to give feedback about the steps taken without resolving the problem.  It appears that this is a manufacturer problem
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