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mGRE in VRF and Source Interface Issue

friends,

 

I have a scenario where i need to use multiple multi-point GRE tunnels and put them in VRF for each customer. The problem i am facing is that for each Tunnel i use  Routers loopback in global table as source address.  It works fine for one Tunnel. But as soon as i create another tunnel using the same loopback as source. Both tunnels go down.  If i use different loopback addresses for each tunnel, all tunnels stays up.    Can anyone tell me why i cannot use one loopback as source-address for all tunnels??  creating indiviual loopback for each tunnel doesn't seem scalable. 

 

interface Tunnel0
 ip vrf forwarding RED
 ip address 10.0.0.1 255.255.255.0
 no ip redirects
 ip nhrp map 10.0.0.4 172.16.1.4
 ip nhrp map 10.0.0.5 172.16.1.5
 ip nhrp network-id 1
 tunnel source Loopback0
 tunnel mode gre multipoint
end

 

interface Tunnel1

 ip vrf forwarding BLUE
 ip address 11.0.0.1 255.255.255.0
 no ip redirects
 ip nhrp map 11.0.0.6 172.16.1.6
 ip nhrp network-id 2
 tunnel source Loopback1
 tunnel mode gre multipoint
end

 

interface FastEthernet0/0
 description *** Connected to Customers  for mGRE ***
 ip address 172.16.1.1 255.255.255.0
end

 

interface Loopback0

 ip address 1.1.1.254 255.255.255.255
end

1 REPLY

Hello Can you provide  show

Hello

 

Can you provide  show interface tunnel

 

Harish

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