Modular Server port connect rejected by Cisco Nexus

We have an Intel Modular Server having a network issue:

MFSYS25V2 Firmware 10.18.100.20130627.38849

3 Compute Modules model MFS5520VIR firmware 1.27.1

1 Gigabit Ethernet Switch AXXSW1GB firmware 1.0.0.28

1 Chassis Management Module firmware E91057-302

1 Server Storage Module firmware 3.11.0140.11

We use Server Ports 1.1, 2.1, 3.1 in VLAN99 connected through Ext. 1 to a HP switch at our DMZ.  Network 192.168.1.0. No issues there.

We want Server Ports 1.2, 2.2, 3.2 in VLAN 1 (default) connected through Ext. 3 (or any) to our Cisco 5500 Nexus.  Network 10.1.4.0. When we connect this VLAN to our 5500, the Cisco port is immediately shutdown with a Spanning Tree error (BPDU). 

Port configuration screen.

I'm desperate for suggestions.  Any help here?

Thanks,

Don Riner

Network Admin

Key Benefits Administrators

Indianapolis