Trunk between Cisco an Aruba

[mulbreizh]

Hello and sorry for my bad english,

I have a lag/etherchannel between my Cisco C3850 and two Aruba 8100 in stack. I have troubles because there is a lot of packets discarded as you can see below on picture. 

My configuration on Cisco is like this :
interface Port-channel32
description aruba
switchport trunk native vlan 999
switchport mode trunk
switchport nonegotiate

interface TenGigabitEthernet1/0/39
description Aruba A8100
switchport trunk native vlan 999
switchport mode trunk
switchport nonegotiate
channel-group 32 mode active
!
interface TenGigabitEthernet1/0/40
description Aruba A8100
switchport trunk native vlan 999
switchport mode trunk
switchport nonegotiate
channel-group 32 mode active

and on Aruba :

interface lag 1 multi-chassis
description LACP-to-Coeur
no shutdown
no routing
vlan trunk native 999
vlan trunk allowed 1-2,5,15,17,21-22,25-26,45,51,54,56,61-62,70,89,100,102,104,110,999
lacp mode active
spanning-tree bpdu-filter
spanning-tree rpvst-filter

interface 1/1/47
description aggr LAG1 to core
no shutdown
lag 1
!
interface 1/1/48
description aggr LAG1 to core
no shutdown
lag 1

do you think this configuration is bad ? 

[mulbreizh]

it will be the same ! somes traffic pass through PO32 others trough PO33

If i test, i think i will lost acess again

[Joseph W. Doherty]

". . . WITH Wrong design see what happened NO reachability and Input count jump to thousand . . ."

Yup, seems like classic L2 loop impact.  But did your results occilate, i.e. broadcast rate slowed and sped up and reachability came back and lost again?