Hi Steve,
The service-lan (S-VLAN) has id v4000
> show vlans v4000 extensive
VLAN: v4000, Created at: Sat Jul 9 10:22:18 2016
802.1Q Tag: 4000, Internal index: 8, Admin State: Enabled, Origin: Static
Description:
Dot1q Tunneling status: Enabled
Customer VLAN ranges:
1-4094
Protocol: Port Mode, Mac aging time: 300 seconds
Number of interfaces: Tagged 1 (Active = 1), Untagged 1 (Active = 1)
xe-0/1/0.0*, tagged, trunk
ge-0/0/1.0*, untagged, access
> show vlans v4000 extensive
VLAN: v4000, Created at: Sat Jul 9 10:26:25 2016
802.1Q Tag: 4000, Internal index: 7, Admin State: Enabled, Origin: Static
Description:
Dot1q Tunneling status: Enabled
Customer VLAN ranges:
1-4094
Protocol: Port Mode, Mac aging time: 300 seconds
Number of interfaces: Tagged 1 (Active = 1), Untagged 1 (Active = 0)
xe-0/1/0.0*, tagged, trunk
ge-0/0/1.0, untagged, access
I have also altered the customer facing port ge-0/0/1 on each side to port-mode access