interface Te1/0/1
description "Internet"
switchport access vlan 990
switchport trunk allowed vlan 100,990,999
exit

Should it be just switchport mode trunk ?only

Hi,

How is the port from the N3024 to the USG configured? Is it a trunk port?

Josh,

Can you answer a question for me that I cannot sem to find.  Do Dell N Series switched have the capability of performing NAT?

Yeah, Do switchport mode trunk. 

Ok, just wanted to check.  Back to issue at hand.  Now have TE1/0/1 set to switchport mode trunk and no longer have access to inside interface of firewall...ip route 0.0.0.0 0.0.0.0 10.56.155.254 is stil lin place which is the inside interface of the USG.  I can ping my TE1/0/1 interface which has an ip of 10.56.155.253

ip route shows all are directly connected:

SCA_Private_Main#show ip route

Route Codes: R - RIP Derived, O - OSPF Derived, C - Connected, K - Kernel, S - Static
B - BGP Derived, E - Externally Derived, IA - OSPF Inter Area
E1 - OSPF External Type 1, E2 - OSPF External Type 2
N1 - OSPF NSSA External Type 1, N2 - OSPF NSSA External Type 2
S U - Unnumbered Peer, L - Leaked Route, T - Truncated ECMP Route

* Indicates the best (lowest metric) route for the subnet.

Default Gateway is 10.56.155.254
S *0.0.0.0/0 [1/0] via 10.56.155.254, 00h:08m:57s, Vl990
C *10.56.150.0/28 [0/0] directly connected, Vl999
C *10.56.155.240/28 [0/0] directly connected, Vl990
C *10.56.200.0/24 [0/0] directly connected, Vl100

ok, switch it back to access for now, but it seems like there is something between the main switch and the usg that isn't passing other VLAN traffic. 

Yes, the original and now I have no access to the inside interface of the router.  I can no longer ping 12.208.153.74

Is the original problem still there?