Hi clambert, thanks your reply.
PE03:
RouterOS 6.48.6
model = CCR2004-1G-12S+2XS
serial number = D4F10DC99677
/routing bgp instance
set default as=65088 router-id=100.64.88.5
add as=65088 disabled=yes name=VRF-Green router-id=10.88.123.1 routing-table=vrf-green
/routing bgp instance vrf
add redistribute-connected=yes redistribute-other-bgp=yes routing-mark=vrf-green
/routing bgp peer
add hold-time=1m30s keepalive-time=30s name=iBGP-CORE remote-address=10.88.255.10 remote-as=65088 update-source=loop88-bridge
add address-families=ip,vpnv4 hold-time=1m30s keepalive-time=30s name=iBGP-PE01 remote-address=10.88.255.1 remote-as=65088 update-source=loop88-bridge
add address-families=ip,vpnv4 hold-time=1m30s keepalive-time=30s name=iBGP-PE02 remote-address=10.88.255.2 remote-as=65088 update-source=loop88-bridge
add address-families=vpnv4 hold-time=1m30s keepalive-time=30s multihop=yes name=eBGP-CE03-Green remote-address=10.88.123.2 remote-as=65388
add hold-time=1m30s keepalive-time=30s name=eBGP-CE03-DIA remote-address=100.64.88.6 remote-as=65388
CE03:
model = RBD53iG-5HacD2HnD
serial number = D96C0C9F8B01
/routing bgp instance
set default as=65388 router-id=100.64.88.6
add as=65388 disabled=yes name=VRF-Green router-id=10.88.123.2 routing-table=vrf-green
/routing bgp instance vrf
add redistribute-connected=yes redistribute-other-bgp=yes routing-mark=vrf-green
/routing bgp network
add network=100.64.88.6/32 synchronize=no
add network=100.64.88.32/28 synchronize=no
add disabled=yes network=10.88.103.1/32 synchronize=no
add disabled=yes network=10.88.103.2/32 synchronize=no
add disabled=yes network=10.88.103.3/32 synchronize=no
add disabled=yes network=10.88.103.4/32 synchronize=no
add disabled=yes network=10.88.103.5/32 synchronize=no
/routing bgp peer
add address-families=vpnv4 hold-time=1m30s keepalive-time=30s multihop=yes name=eBGP-PE03-Green remote-address=10.88.123.1 remote-as=65088
add address-families=ip,vpnv4 hold-time=1m30s keepalive-time=30s name=eBGP-PE03-DIA remote-address=100.64.88.5 remote-as=65088