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Community Member

VPN GRE

Hi

I need some help related to GRE Point to Point &  MGRE, Dynamic routing issue

P2P GRE

I have configure P2P GRE , i am able to ping from R1 to R3  & R3 to R1 Tunnel IP, but after enabling IGP dynamic protocol i am not able to ping and the Tunnel is getting down, Any Idea,

here the configuration of GNS using 3725 with IOS 12.4

R1

int fa0/0

ip add 10.1.101.1 255.255.255.0

no sh

int loo 0

ip add 1.1.1.1 255.255.255.255

int tun 1

ip add 192.168.1.1 255.255.255.0

tunnel source 10.1.101.1

tunnel destination 20.2.102.3

ip route 0.0.0.0 0.0.0.0 10.1.101.2

 

R2-ISP Router

int fa0/0

ip add 10.1.101.2 255.255.255.0

no sh

 

int fa0/1

ip add  20.2.102.2 255.255.255.0

no shut

R3

int fa0/0

ip add 20.2.102.2 255.255.255.0

no sh

int loo 0

ip add   3.3.3.3  255.255.255.255

int tun 1

ip add 192.168.1.3 255.255.255.0

tunnel source 20.2.102.2

tunnel destination 10.1.101.1

ip route 0.0.0.0 0.0.0.0  20.2.102.2

 

 

 

 

 

3 REPLIES

Hi Shakeel, You haven't

Hi Shakeel,

 

You haven't posted anything about the IGP configs which you have put on the routers.

 

Regards

Karthik

Community Member

Hi karthik here the IGP

Hi karthik

 

here the IGP configuration

 

R1

router eigrp 100
No auto
net 10.0.0.0
net 1.0.0.0
net 192.168.1.0

R3


router eigrp 100
No auto
net 10.0.0.0
net 1.0.0.0
net 192.168.1.0

Community Member

You should configure 'passive

You should configure 'passive interface ' on both tunnel interfaces. it can avoid establishing adjancy between tunnel end points.

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