[c-nsp] Cisco ASR 901 as a DHCP server

Wondering if anyone has configured a 901 as a DHCP server.  It's being used
in a multi-tenant location, other customers are static public /30 and work
fine, but we have a customer who wants us to do DHCP for them. So instead
of adding another box, I was trying to get the 901 to be the DHCP server.
For some reason, it's not working.  I have configured other routers no
problem as a DHCP server, this one the client gets an IP, can ping the
gateway, can ping the uplink IP, can ping the core, but can't leave our
network.  Kinda feels like a MTU issue, but all set to 9000.  Here's my
config:
Anyone ever try it, and have any suggestions?

ASR901 - A901-12C-F-D
AdvancedMetroIPAccess
Version 15.6(2)SP3

!
ip dhcp excluded-address 192.168.3.1 192.168.3.50
ip dhcp excluded-address 192.168.4.0 192.168.4.50
!
ip dhcp pool DATA
 network 192.168.3.0 255.255.255.0
 default-router 192.168.3.1
 dns-server xx.xx.xx.xx
!
ip dhcp pool VOICE
 network 192.168.4.0 255.255.255.0
 dns-server xx.xx.xx.xx
 default-router 192.168.4.1
!
interface GigabitEthernet0/0
 description UPLINK TO CORE
 mtu 9000
 no ip address
 ip nat outside
 load-interval 30
 negotiation auto
 service instance 50 ethernet
  description PTP to CORE OSPF Area 0
  encapsulation untagged
  bridge-domain 50
 !
interface Vlan50
 description OSPF TO CORE
 mtu 9000
 ip address xx.xx.206.30 255.255.255.252
 no ip redirects
 no ip proxy-arp
 ip nat outside
 ip pim sparse-mode
 ip ospf network point-to-point
 ip ospf mtu-ignore
 load-interval 30
 carrier-delay msec 0
 mpls ip
 mpls traffic-eng tunnels
!
interface GigabitEthernet0/1
 description Uplink to Customer XXXXXX - DHCP Inside
 mtu 9000
 no ip address
 ip nat inside
 load-interval 30
 negotiation auto
 service instance 100 ethernet
  description XXXXXXX Data Network
  encapsulation untagged
  bridge-domain 100
 !
!
interface Vlan100
 description XXXXXX Data Network
 mtu 9000
 ip address 192.168.3.1 255.255.255.0
 no ip redirects
 no ip proxy-arp
 ip nat inside
!
ip nat inside source list 150 interface Vlan50 overload
!
access-list 150 remark Network Address Translation
access-list 150 permit ip 192.168.3.0 0.0.0.255 any
access-list 150 permit ip 192.168.4.0 0.0.0.255 any
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