Help with trunk port between ASR 920 and Cat9k5

I'm having a bit of trouble on this one for some reason. Both devices are running 16.9.3. I'll eventually need to add two more VLANs for this as part of a rehoming project.

Cat9k5

int Te1/0/1 switchport trunk allow vlan 999 switchport mode trunk int vlan 999 ip address 123.123.123.3 255.255.255.248 

ASR920

int Te0/0/1 service instance 999 ethernet encapsulation dot1q 999 rewrite ingress tag pop 1 symmetric bridge-domain 999 ! int BDI999 ip address 123.123.123.1 255.255.255.248 

I can see a mac from the ASR920 on the Cat9k5, but I can't see a mac on the ASR920, and obviously traffic is unidirectional.

#show ethernet service instance id 999 interface te0/0/1 mac dynamic address Bridge-domain 999 MAC Address #show ethernet service instance id 999 interface te0/0/1 detail Service Instance ID: 999 Service Instance Type: Static Associated Interface: TenGigabitEthernet0/0/1 Associated EVC: L2protocol drop CE-Vlans: Encapsulation: dot1q 999 vlan protocol type 0x8100 Rewrite: ingress tag pop 1 symmetric Interface Dot1q Tunnel Ethertype: 0x8100 State: Up EFP Statistics: Pkts In Bytes In Pkts Out Bytes Out 0 0 831 56508 EFP Microblocks: **************** Microblock type: Bridge-domain Bridge-domain: 999 Microblock type: L2Mcast L2 Multicast GID: 1 Microblock type: dhcp_snoop L2 Multicast GID: 1 Microblock type: PPPoE IA UBLOCK PPPoE IA info Enable: 0 Format Type: 0 cricuit id: remote id: