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891f-k9 Router EVPL Programming Issue

shoyle001
Beginner
Beginner

I can not seem to find the correct programming for my comcast EVPL Network that works with these routers.

the setup is like
 
  - WAN - 
       |
    891F - LAN1
       |
  -EVPL-
       |
       ^   
    |      |
   |        |
  |          |
891F    891F
  |          |
Lan2   Lan3
i figured i would use somethink like a VLAN or an Subinterface on the 891F at the top but i dont understand how to code the bottom 2 to work with the subinterface or vlan
 
I need each site to have its own subnet for programming. my current setup (which is not working) is something like
 
891F (1)
vlan1
 ip address 4.3.2.1 255.255.255.0
 ip nat inside
!
ip route 4.3.3.0 255.255.255.0 4.3.2.2
 
 
(cable going from one of the switch ports to the EVPL Interface)
 
891F (2)
gigabitethernet8
 ip address 4.3.2.2 255.255.255.0
 ip nat outside
!
vlan1
 ip address 4.3.3.1 255.255.255.0
 ip nat inside
 
ip route 0.0.0.0 0.0.0.0 4.3.2.1
ip nat inside source list 1 interface gigabitethernet8 overload
access-list 1 permit 4.3.3.0 0.0.0.255
 
am i missing something? like are my vlans not working? the circuit was tested as working from site to site. and the router at site 1 has internet as well as anything plugged into its switch ports. 
 
i also tried to use a subinterface like
891F (1)
fastethernet0.210
 encapsulation dot1q 210
 ip address 4.3.0.1 255.255.255.0
 ip nat inside
ip route 4.3.3.0 255.255.255.0 4.3.0.2
 
891F (2)
gigabitethernet8.210
 encapsulation got1q 210
 ip address 4.3.0.2 255.255.255.0
 ip nat outside
vlan1
 ip address 4.3.3.1 255.255.255.0
 ip nat inside
ip route 0.0.0.0 0.0.0.0 4.3.0.1
ip nat inside source list 1 interface gigabitethernet8 overload
access-list 1 permit 4.3.3.0 0.0.0.255
 
i am most likely not even coding this part right but i am not so sure.
 
I am a cisco nub and need some major help.
(also comcast gave me a ctag but i shouldnt need to use these for routing right? if so i dont know how to)
 
Thanks in advance
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