Scenario

Four dell 5548 switches connected in stacking with default route to 0.0.0.0 / 0 172.17.0.1 172.17.0.2/29 IP and HDMI cables and.
Two dell 6224 switches (Switch CORE) connected with ip 172.17.0.1/29 stacking with default route to 0.0.0.0 / 0 172.17.9.2 (Sonicwall).
Configured within twelve dell 6224 VLANs.
The dell 6224 this routing switch all VLANs without any problem, the big problem was to make the dell 6224 switch to route the packet that he does not know for Sonicwall, was only routing the packets coming from the same vlan Sonicwall other VLANs could not get the Sonicwall.

Solution

In Sonicwall create routes for all VLANs:

Source: Any
Destination: 172.17.0.1/29
Service: Any
Gateway: 171.17.0.1 (CORE DELL Switch 6224)
Interface: X0
Metric: 1

You must manually create a route for each vlan in your environment

VLANS

100    172.17.0.0/29
101    172.17.10.0/27
102    172.17.1.0/25
103    172.17.3.0/26
104    172.17.4.0/28
105    172.17.5.0/25
106    ISP A       
107    ISP B       
108    172.17.6.0/29
109    172.17.7.0/29
110    172.17.8.0/29
111    172.17.9.0/27
112    172.17.2.0/28