> Конфиг бы..

дык простейший...

ip dhcp use vrf connected
!
ip dhcp pool dhcp_pool_red
   vrf prov2
   network 10.0.0.0 255.255.255.0
   default-router 10.0.0.1
   domain-name customer_red
   dns-server 8.8.8.8
!
!
ip vrf prov2
rd 100:10

провайдер комстар идет через врф.
interface Vlan10
description comstar
ip vrf forwarding prov2
ip address 8.2.2.2 255.255.255.252
ip nat outside
ip virtual-reassembly
!
interface Vlan11
ip vrf forwarding prov2
ip address 10.0.0.1 255.255.255.0
ip flow ingress
ip flow egress
ip nat inside
ip virtual-reassembly

основной провайдер для локалки
interface GigabitEthernet0/0
bandwidth 100000
ip address ХХХХ
ip nat outside
ip nat enable
ip virtual-reassembly

interface GigabitEthernet0/1.99
description LAN
encapsulation dot1Q 199
ip address 172.18.1.1 255.255.255.0
ip flow ingress
ip flow egress
ip nat inside
ip virtual-reassembly

ip flow-export version 5
ip flow-export destination ip_collector 9996