[c-nsp] mGRE with VRF-Lite

[Shine Joseph]

Hi,

I am working on a solution to run mGRE for VRF-Lite. This is my situation:
there are 5 sites currently connected by MPLS IPWAn provided by ISP. I want to run VRF-Lite throughout the network for path isolation between various VLANs. VRF-Lite works great within the site (Vrf-Lite end-to-end is being deployed). In order for to cross the IPWAN, mutipoint-GRE tunnels are being looked at. tunnels are getting created, but when advertised in the VRF routing process, neighbor is not being esablished. If I use the potint to point tunnel, neighbor relationship is estanblished, working as expected. The issue will be I need to create over 50 tunnels to achieve the expected results.

Can someone help me, if the mGRE with VRF-Lite is a feasible solution?

Thanks in advance

Shine
----------------------------

Following is a snippet of my configuration:

Router 1
========
interface Tunnel110
 ip vrf forwarding Data
 ip address 10.40.61.1 255.255.255.224
 no ip redirects
 ip nhrp map 10.40.61.2 172.16.123.2
 ip nhrp map 10.40.61.3 172.16.123.3
 ip nhrp network-id 110
 ip nhrp cache non-authoritative
 tunnel source GigabitEthernet0/1
 tunnel mode gre multipoint
 tunnel key 110

router eigrp 100
 no auto-summary
 !
 address-family ipv4 vrf Gorgon_Data
  network 10.40.61.1 0.0.0.0
  no auto-summary
  autonomous-system 100
 exit-address-family
!

Router 2
========

interface Tunnel110
 ip vrf forwarding Data
 ip address 10.40.61.2 255.255.255.224
 no ip redirects
 ip nhrp map 10.40.61.1 172.16.123.1
 ip nhrp map 10.40.61.3 172.16.123.3
 ip nhrp network-id 110
 ip nhrp cache non-authoritative
 tunnel source GigabitEthernet0/1
 tunnel mode gre multipoint
 tunnel key 110

router eigrp 100
 no auto-summary
 !
 address-family ipv4 vrf Gorgon_Data
  network 10.40.61.2 0.0.0.0
  no auto-summary
  autonomous-system 100
 exit-address-family

!

Router 3
========

interface Tunnel110
 ip vrf forwarding Data
 ip address 10.40.61.3 255.255.255.224
 no ip redirects
 ip nhrp map 10.40.61.1 172.16.123.1
 ip nhrp map 10.40.61.2 172.16.123.2
 ip nhrp network-id 110
 ip nhrp cache non-authoritative
 tunnel source GigabitEthernet0/1
 tunnel mode gre multipoint
 tunnel key 110

router eigrp 100
 no auto-summary
 !
 address-family ipv4 vrf Gorgon_Data
  network 10.40.61.3 0.0.0.0
  no auto-summary
  autonomous-system 100
 exit-address-family