when server in encloser booting via pxe, and booting fails, hp switch GbE2c stop working

[peter_686868]

When server (G6,G8)  in hp encloser try to boot via pxe and there is no image on pxe server or the name of image is wrong, server start to boot from local hard disk and in this moment whole switch stop working. There is no communiaction on other ports . There is nothing in logs except info about port down on this server. When the server is  turn off switch works ok.. there is some bug or feature in this switch ? Both switches in encloser are connected to the same upstream switch. Another servers and switches works correct with this scenario. The problem is only with hp encloser and switch within GbE2c

Thanks for any advice or info ?

GbE2c L2/L3 Ethernet Blade Switch for HP c-Class BladeSystem

sysLocation: C2H ENCLOSER4

RackId: Default RUID

RackName: Encloser4_C2F

EnclosureSerialNumber: GB8940593P

Hardware Part No: 438030-B21        Spare Part No: 438475-001

Software Version 5.2.7 (FLASH image1), active configuration.