Lot of discards between SRX and HP switch

Hello,

 Does anybody have an idea why i get massive discards between a SRX 300 and a HP (1910, 1810) switch ?

I have the same setup on multiple locations and on all these locations the same issue occurs.

When a port on the SRX is directly connected to for example a Vmware hypervisor there ar no discards at all

Packet Forwarding Engine hardware discard statistics:
    Timeout                    :                    0
    Truncated key              :                    0
    Bits to test               :                    0
    Data error                 :                    0
    Stack underflow            :                    0
    Stack overflow             :                    0
    Normal discard             :             36055623
    Extended discard           :                    0
    Invalid interface          :                    0
    Info cell drops            :                    0
    Fabric drops               :                    0