XS708T lag to m5300 stack

Hi fbcsupport ,

Thanks for your quickly response.

We has received techsupport file just sent.

After analysis the configuration on both M5300&XS708T.

The LAG interface may have inconsistent configuration so that communication fail.

Here is configuration on M5300:

interface lag 9
auto-voip protocol-based
description 'to mezz switch'
port-channel load-balance 6
set igmp mrouter interface
dhcp l2relay
vlan pvid 8
vlan participation include 3,7-8,10,15,20,25,41,70,80,90,199
vlan tagging 3,7,10,15,20,25,41,70,80,90,199
exit

Here is configuration on XS708T:

interface lag 1
description 'to mezz'
no port-channel static   >>>this is mean LACP mode
port-channel load-balance 6

To make both two LAG interface work together,

Please set the same VLAN configuration /MTU on XS708T too.

Let me know about result after set same configuration on both LAG interface.