LAG from EX4300MP to Cisco VSS (2) Catalyst 4300X-16

Hello,

Hardware and software in question:

Juniper:

hardware: EX4300-48MP (multigigabit)

Junos ver: 18.3R1.9

Cisco:

Hardware: Catalyst 4300X-16 port in virtual stack (VSS) that consists of two units

Ios ver: 15.0(1r)SG10

Issue:

I've setup LAG 10g interfaces (4 ports) but when I enable ports on both sides, on juniper all ports are no longer accessible. Weird part(s):

- the management interface is inaccessible event though it shows in junos cli  "up" status. All 4 10g ports are also showing up status and indicator led on the hardware is showing active/green light.

- On Cisco side is the same story. All 4 ports are showing connected, including ether-channel and also, indicator led on the hardware is showing active/green light.

Relevant ports configuration on Juniper:

============================

xe-0/2/0 {
ether-options {
802.3ad ae1;
}
}
xe-0/2/1 {
ether-options {
802.3ad ae1;
}
}
xe-0/2/2 {
ether-options {
802.3ad ae1;
}
}
xe-0/2/3 {
ether-options {
802.3ad ae1;
}
}
ae1 {
description "LAG to Cisco";
aggregated-ether-options {
lacp {
active;

================================================

Relevant Cisco configuration:

================================================

interface Port-channel111
description HR SRV RM
switchport
switchport mode trunk

!

interface TenGigabitEthernet1/1/5
description HR Jun4300 Link 1
switchport mode trunk
channel-group 111 mode active
!
interface TenGigabitEthernet1/1/6
description HR Jun4300 Link 2
switchport mode trunk
channel-group 111 mode active

!

interface TenGigabitEthernet2/1/13
description HR Jun4300 Link 3
switchport mode trunk
channel-group 111 mode active
!
interface TenGigabitEthernet2/1/14
description HR Jun4300 Link 4
switchport mode trunk
channel-group 111 mode active

============================================================

Any suggestion would be greatly appreciated.