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GRE Tunnel over Cell / Dailer not working correctly

Hello all!

I'm having an issue with a tunnel between two routers. I have the tunnel up and going, I can ping back and forth across the tunnels. What I can't do is ping local devices on only one end of the tunnel. That router is connected via 4g LTE cell/dialer. It seems as if the dialer won't let traffic pass to the local network, with exception to the local network gateway (192.168.215.1).

Everything can ping 192.168.215.1. 192.168.215.1 can ping everything. However devices on network 192.168.215.0/24 can't ping anything except 192.168.215.1.

For the life of me I can't figure out what is wrong, but I'm beginning to think its the dialer or cell config. Can someone point out what I am doing wrong?

Here is the config for both router - 

####################### Cell Router #######################

interface Tunnel1
 ip address 10.20.0.2 255.255.255.0
 ip mtu 1400
 ip tcp adjust-mss 1360
 tunnel source Dialer1
 tunnel destination x.x.61.180
!
interface GigabitEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 ip address 192.168.215.1 255.255.255.0
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface Cellular0/0/0
 bandwidth 2000
 ip address negotiated
 ip virtual-reassembly in
 encapsulation slip
 dialer in-band
 dialer pool-member 1
 dialer-group 1
 async mode interactive
!
interface Dialer1
 ip address negotiated
 ip virtual-reassembly in
 dialer pool 1
 dialer idle-timeout 0
 dialer string LTE
 dialer persistent
 dialer-group 1
!
router eigrp 5
 network 10.0.0.0
 network 192.168.215.0
!
ip forward-protocol nd
!
ip http server
ip http authentication local
ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Dialer1
ip route 192.168.0.0 255.255.0.0 Tunnel1
!
dialer-list 1 protocol ip permit
!
line 0/0/0
 script dialer LTE
 modem InOut
 no exec
line 0/0/1 0/0/3
 no exec
line vty 0 4
 login local
 transport input all
!
end

Cell2901#ping 192.168.100.99
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.100.99, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 80/92/136 ms
Cell2901#ping 192.168.100.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.100.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 76/85/96 ms
Cell2901#ping 192.168.215.13
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.215.13, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Cell2901#

####################### VPN  Router #######################
interface Tunnel1
 ip address 10.20.0.1 255.255.255.0
 ip mtu 1400
 ip tcp adjust-mss 1360
 tunnel source x.x.61.180
 tunnel destination x.x.78.245
!
interface GigabitEthernet0/0
 description Public
 ip address x.x.61.180 255.255.255.248
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description Private Network
 ip address 192.168.100.99 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 5
 network 10.0.0.0
 network 192.168.100.0
 network 192.168.215.0
!
ip route 0.0.0.0 0.0.0.0 x.x.61.177
ip route 192.168.215.0 255.255.255.0 10.20.0.2

VPN#ping 192.168.215.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.215.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 80/81/88 ms
VPN#ping 192.168.215.13
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.215.13, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

  • WAN Routing and Switching
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