Hi,
I'm having trouble setting up Q-in-Q between 2 EX3300 - Customer facing port is ge-0/0/0, Service-port (facing each other) is ge-0/1/0. I tried the Example form (https://www.juniper.net/documentation/en_US/junos13.3/topics/example/qinq-tunneling-ex-series.html) and tried 0x9100 and 0x8100 - however it seems that I'm missing something...
I configured the following:
set system host-name EX3300-1
set interfaces ge-0/0/0 unit 0 family ethernet-switching port-mode access
set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members vl-3001
set interfaces ge-0/1/0 unit 0 family ethernet-switching port-mode trunk
set interfaces ge-0/1/0 unit 0 family ethernet-switching vlan members vl-3001
set ethernet-switching-options dot1q-tunneling ether-type 0x8100
set vlans vl-10 vlan-id 10
set vlans vl-11 vlan-id 11
set vlans vl-12 vlan-id 12
set vlans vl-20 vlan-id 20
set vlans vl-22 vlan-id 22
set vlans vl-3001 vlan-id 3001
set vlans vl-3001 dot1q-tunneling customer-vlans 10-12
set vlans vl-3001 dot1q-tunneling customer-vlans 20
set vlans vl-3001 dot1q-tunneling customer-vlans 22
set protocols lldp interface all
set system host-name EX3300-2
set interfaces ge-0/0/0 unit 0 family ethernet-switching port-mode access
set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members vl-3001
set interfaces ge-0/1/0 unit 0 family ethernet-switching port-mode trunk
set interfaces ge-0/1/0 unit 0 family ethernet-switching vlan members vl-3001
set ethernet-switching-options dot1q-tunneling ether-type 0x8100
set vlans vl-10 vlan-id 10
set vlans vl-11 vlan-id 11
set vlans vl-12 vlan-id 12
set vlans vl-20 vlan-id 20
set vlans vl-22 vlan-id 22
set vlans vl-3001 vlan-id 3001
set vlans vl-3001 dot1q-tunneling customer-vlans 10-12
set vlans vl-3001 dot1q-tunneling customer-vlans 20
set vlans vl-3001 dot1q-tunneling customer-vlans 22
set protocols lldp interface all