Data Center

Hey all, looking for an assist on a use case I have:

(similar to traffic pattern 3 in  EVPN User guide)

scenario:  C-Tagged traffic is received on ingress interface.  S-Tag is pushed on ingress.  packet transits my fabric and I hand off dual-tagged packet to the next service provider.  I have IP reachability however my dual-tagged outer (S-Tag) is received as ether-type 8100.  My requirement is to deliver the S-Tag with ether-type of 88a8.  Do I have a way on the QFX platform to tag with 88a8 either at the ingress or egress port?

additional info:

QFX5120 Leaf switches running  22.2R3-S3.18.  ERB configuration

CE Device (scapy)-.Qfx5120 Leaf->Qfx5120 Spine->Qfx5120 Leaf-> SP handoff (using Spirent STC/packet capture.  This is pre-prod)

S-Tag=100

C-Tag=200

mac-vrf.  service-type vlan-bundle

Current Port configuration:

Ingress

set interfaces xe-0/0/1 flexible-vlan-tagging
set interfaces xe-0/0/1 encapsulation extended-vlan-bridge
set interfaces xe-0/0/1 ether-options ethernet-switch-profile tag-protocol-id 0x88a8
set interfaces xe-0/0/1 unit 100 vlan-id-list 100-200

Egress

set interfaces xe-0/0/53:0 flexible-vlan-tagging
set interfaces xe-0/0/53:0 encapsulation extended-vlan-bridge
set interfaces xe-0/0/53:0 ether-options ethernet-switch-profile tag-protocol-id 0x88a8
set interfaces xe-0/0/53:0 unit 100 vlan-id 100
set interfaces xe-0/0/53:0 unit 100 input-vlan-map pop
set interfaces xe-0/0/53:0 unit 100 output-vlan-map push

Routing Instance

set routing-instances Q-in-Q_GB_TEST instance-type mac-vrf
set routing-instances Q-in-Q_GB_TEST protocols evpn encapsulation vxlan
set routing-instances Q-in-Q_GB_TEST protocols evpn default-gateway no-gateway-community
set routing-instances Q-in-Q_GB_TEST protocols evpn extended-vni-list all
set routing-instances Q-in-Q_GB_TEST vtep-source-interface lo0.0
set routing-instances Q-in-Q_GB_TEST service-type vlan-bundle
set routing-instances Q-in-Q_GB_TEST interface xe-0/0/53:0.100
set routing-instances Q-in-Q_GB_TEST route-distinguisher 10.x.x.x:5
set routing-instances Q-in-Q_GB_TEST vrf-target target:424xxxxxx:5
set routing-instances Q-in-Q_GB_TEST vlans v100 interface xe-0/0/53:0.100
set routing-instances Q-in-Q_GB_TEST vlans v100 vxlan vni 10100
set routing-instances Q-in-Q_GB_TEST vlans v100 vxlan encapsulate-inner-vlan

one other note, a different use case I have where my customer sends both C and S tags is received correctly.  i.e. I generate the dual tagged packet in Scapy and it is received with an S-Tag ethertype of 88a8.   The fabric successfully delivers the packet with the correct formatting.

Appreciate any help that can be provided!