Packet loss on guest OS

Hello all,

Host ESXi, 5.0.0, 1311175

HP ProLiant DL380 G7

Cores: 12 CPU's x 3.465 GHz (usage: 747 MHz)

Processor Type: Xeon x5690 @ 3.47GHz

Processor Sockets: 2

Cores per Socket: 6

Logical Processors: 24

Hyperthreading: Active

Number of NICs: 6

Memory 122869.70 MB (usage 23026.00 MB)

5 Guest OS'.

Each guest goes to a vswitch which is connected to two physical adapters. Each adapter is at 10Gb.

Problem;

I am noticing packet loss when pinging each guest OS, but no packet loss when pinging the host ESX.

Thanks!