You may wish to consult with your HP TCC about configuring the support Pack for NIC Teaming.
With that enabled on your bl20p, you can use UFD (Uplink failure Detection) on the GbE2 switches, available in 2.2 or later firmware.
There are config templates available on bladeconnect.com (
http://bladeconnect.com/configs.php) that will show you how to configure the ltm (link to monitor) and then the ltd (link to disable) once the NIC see's a failure.
Also, don't forget to disable the xconnect links, 17 and 18 as the feature won't work with those enabled.
At the bottom of the website there are contact name by region who can help you furture.