Dell PowerConnect 3448
Software version: 1.0.0.112

I have configured interface 1/e43 on the Dell 3448 as vlan 237 and the 1/g1 interface as a trunking port.

interface range ethernet 1/g(1-2)
switchport mode trunk
exit
vlan database
vlan 237
exit
interface ethernet 1/e43
switchport access vlan 237
exit
interface range ethernet 1/g(1-2)
switchport trunk allowed vlan add 237
exit

  The 1/g1 port is a fiber uplink and connects to a Cisco 4500 series core layer 3 switch (fiber module on blade 7).  The interface on the Cisco is configured as a trunking port also.  The 237 vlan is working on as expected through the Cisco 4500 and a Cisco 2950 in a different building.

My problem is that arp requests are going out to the default gateway OK.  The arp response is getting back to the 1/g1 interface on the Dell switch and is stopping there.

Any ideas/suggestion will be greatly appreciated.