GRE Tunnel issue

[ittechk4u1]

Hello Experts,

I need help...urgently

i created a normal GRE tunnels on two routers!(routing protocol: EIGRP)

i can see that one side EIGRP Tunnel is up and also showing in eigrp neighbour but other side tunnel is also UP but not shwoing eigrp neighbour. Also i cant ping the tunenl IP from both end.

Router1:

interface Tunnel100
ip address 172.25.100.1 255.255.255.252
ip mtu 1300
ip tcp adjust-mss 1260
tunnel source 148.244.229.68
tunnel destination 96.85.125.162

!

router eigrp 1
distribute-list prefix filter_eigrp out
network 10.84.0.0 0.0.255.255
network 172.25.100.0 0.0.0.3
redistribute static route-map static2EIGRP
passive-interface Loopback0

Router2:

interface Tunnel100
ip address 172.25.100.2 255.255.255.252
ip mtu 1300
ip tcp adjust-mss 1260
tunnel source 96.85.125.162
tunnel destination 148.244.229.68

!

router eigrp 1
distribute-list prefix filter_eigrp out
network 10.86.0.0 0.0.255.255
network 172.25.100.0 0.0.0.3
redistribute static route-map static2EIGRP
passive-interface Loopback0

Thanks

[Alex Pfeil]

Please do show ip eigrp interfaces

Make sure that EIGRP is enabled on the tunnel interface on both routers. 

[Alex Pfeil]

Also, do you have a static route pointing to the destination IP of the tunnel interface going out the correct interface on both sides?

[ittechk4u1]

yes it is there..

ip route 148.244.229.68 255.255.255.255 96.85.125.174 name Spoke_CO_AL-PUEBLA

ip route 96.85.125.162 255.255.255.255 148.244.229.65 name Spoke_AL_CO-DETROI

[ittechk4u1]

Here is isÖ

PURCVPN1#sh ip ei interfaces
EIGRP-IPv4 Interfaces for AS(1)
Xmit Queue PeerQ Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable Un/Reliable SRTT Un/Reliable Flow Timer Routes
Tu1 1 0/0 0/0 186 0/2 762 0
Tu2 1 0/0 0/0 180 0/2 722 0
Vl4 1 0/0 0/0 1 0/0 50 0
Vl6 0 0/0 0/0 0 0/0 0 0
Tu187 1 0/0 0/0 70 0/5 252 0
Tu87 2 0/0 0/0 59 0/4 260 0
Tu100 0 0/0 0/0 0 6/6 0 0
PURCVPN1#

[a.alekseev]

ping  148.244.229.68 source 96.85.125.162
ping  96.85.125.162 source 148.244.229.68

[ittechk4u1]

result..

PURCVPN1#ping 96.85.125.162 source gig0/1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 96.85.125.162, timeout is 2 seconds:
Packet sent with a source address of 148.244.229.68
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 88/92/96 ms

DERCVPN1#ping 148.244.229.68 so 96.85.125.162
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 148.244.229.68, timeout is 2 seconds:
Packet sent with a source address of 96.85.125.162
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 93/98/100 ms
DERCVPN1#

its working

[a.alekseev]

check acl's on both sides

[ittechk4u1]

permit ip any any 

ACL is not blcoking anything....

[Alex Pfeil]

Can you ping between the tunnel interfaces now?

[ittechk4u1]

no its not working..

PURCVPN1#ping 172.25.100.2 so tunnel 100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.25.100.2, timeout is 2 seconds:
Packet sent with a source address of 172.25.100.1
.....
Success rate is 0 percent (0/5)
PURCVPN1#

[a.alekseev]

show the configuration on 148.244.229.68

[ittechk4u1]

here its is:

deleted...-----------------------------

[Alex Pfeil]

PURCVPN1#ping 96.85.125.162

Does this have a route to 96.85.126.162?

[ittechk4u1]

yes it has..

PURCVPN1#ping 96.85.125.162
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 96.85.125.162, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 88/91/96 ms
PURCVPN1#