Weird behavior of Storage dell ME4024

Hi i have strange issue with ME4024 on my customer

iam use ME4024 4 port ISCSI
i already checked jumbo frames on advance configuration iscsi port

i already configure jumbo mtu on switches side and server side

but when i test ping with 8900 packet size from server to iscsi host port
it shows

64 bytes from 192.168.72.98: icmp_seq=1 ttl=64 (truncated)
means that packet is truncated every 64 bytes

even if i ping with 1400 bytes size the output shows truncated

anyone knows how to solve this

 

thanks