Loadbalancer IMPI problems. Help with configuring Cisco 3750/2950

I'm attempting to replicate here in the office and find the solution for a problem that we are experiencing at both our data centre sites.This is the problem:

Everytime we load the IPMI WebUI to any of our Loadbalancer Supermicro units the IPMI crashes shortly after logging in and connectivity can only be restored by power cycling the Loadbalancer or disconnecting/reconnecting the network.

There are two Loadbalancers in each rack as Master/Slave.

The IPMI ports are connected to stacked Cisco WS-C3750X-24T-L   switches into a management VLAN.

As a potential solution we have decided to have a switch just for the IPMI/RSAs but this is currently not working as expected as there is no connectivity from the internal network to the IPMI port even though the VLAN is correct.

The crossed cables connecting the 3750 swtiches and 2950 switch are configured as lacp.

Is this a standard configuration or is there and obvious problem with how we're set up?

There needs to be failover in the event that one of the stacked switches fails. The only single point of failure is the 2950, this isn't ideal but most of the servers in the rack only have a single remote management NIC.

Below is a diagram. If you need any more information just ask.

You already have VLAN tagging with the "switchport mode trunk" and "switchport trunk encasulation dot1q" commands. What you need is VLAN 103 and 104 on both the WS-C3750X-24T-S   and the 2960 in the vlan database ("show vlan" will tell you if they are there). Then you add a "interface vlan 103" to the 3750 and give it the IP address of the default gateway of your load balancer. And you give your 2960 an "interface vlan 104" and set the IP address to an address of the subnet that you will use for management.

When in doubt please post configs without passwords/keys.