VNX Boot from SAN issue

Hi Team,

Recently we have configured VNX7500 with HP Blade 460C as boot from SAN configuration.

We are using brocade switches for the connectivity.

But we are facing the issue of the the servers losing the connectivity to the SAN disks with the initiators logging off fromt eh VNX and then losing access to the LUNs whereby the servers crash.

This is taking place randomly not for some specifc server/blade or SG.

We have 3 such Blade chasis and all are facing this issue. this isue is not limited to the boot LUNs but happens for the noemal LUNs as well.

we are using:

HP BL460C with interconnect firmware 1.41

Brocade switches with firmware 6.4.2a

Pls let me know if you can help to solve this issue.

Regds,

mannan