RHEL Bonding Issue - No consistant checking for a failed link

Hi Guys

We have got 16 HP DL320e Gen8 servers running with 64bit RHEL 6.4. Each of these servers have got 4 NIC ports. 2 on-board and 2 on a extended adapter. The network interfaces are named as follows:

on-board NIC ports = em1, em2
extended NIC ports = p2p1, p2p2

We have created 2 bonds.:

Bond0 = em1 & p2p1
Bond1 = em2 & p2p2

The drivers for these NICs are updated to the latest(18th Feb 2014) available from HP.

However, we are noticing some sort of inconsistencies with the em1 and em2 interfaces. They are not consistently detecting that a link has failed.

All the em interfaces connect to switch 11 and all the p2px interfaces connect to switch 12. When switch 11 loses power, some of the interfaces do not detect the failure. The specific interfaces that have this issue are random. Network Manager service has been disabled. The configuration files are attached.

Could some experts from the community throw some sort of assistance or help to resolve this issue we are encountering?
Looking forward to hearing from you.

Regards
Jo V