Can't ping to up Tunnel

[Mero Cisco]

Hi,

I have created the tunnel interface on cisco 1841 router. The tunnel is up but can't ping to it's interface ip, the ping drops.

Please have a look at the following output and give me some suggestions,

Thanks for your cooperation in advance.

R1#show ip int brief

Interface                  IP-Address      OK? Method Status                Protocol

Tunnel10                   10.10.10.1    YES manual up                    up

R1#sho int tunn10

Tunnel10 is up, line protocol is up

  Hardware is Tunnel

  Description: Connection to Branchess

  Internet address is 10.10.10.1/24

  MTU 1514 bytes, BW 9 Kbit, DLY 10000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation TUNNEL, loopback not set

  Keepalive not set

  Tunnel source 10.10.18.1 (FastEthernet0/1), destination UNKNOWN

  Tunnel protocol/transport multi-GRE/IP, key 0x987756, sequencing disabled

  Checksumming of packets disabled,  fast tunneling enabled

  Last input never, output never, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/0 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     0 packets input, 0 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     0 packets output, 0 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 output buffer failures, 0 output buffers swapped out

[paul driver]

Hello

Is the tunnel destination specified and reachable?

Enable keepalive on the tunnel and see if it still stays up

int tun 10

keep 5

Tunnel source 10.10.18.1 (FastEthernet0/1), destination UNKNOWN

res

Paul

Please don't forget to rate any posts that have been helpful.

Thanks.

[johnlloyd_13]

hi,

your tunnel and source ip are overlapping. kindly re-assign with different subnets.

[Richard Burts]

John

If the tunnel source is

Tunnel source 10.10.18.1 (FastEthernet0/1)

and the tunnel address is

  Internet address is 10.10.10.1/24

then I do not see the overlap that you do.

I believe that it would be helpful if the original poster would give us the details of how the tunnel is configured. I am very interested in this line of output and would like to see the configuration behind it

Tunnel protocol/transport multi-GRE/IP,

HTH

Rick

[Mero Cisco]

Dear All,

Please look at the following configuration. When I shift the following commands to other router I can ping to tunnel interface but on this router I am not being able to ping

crypto isakmp policy 10

encr aes

authentication pre-share

crypto isakmp key XXXX address 0.0.0.0 0.0.0.0

crypto isakmp keepalive 20 3

crypto ipsec transform-set DMVPN esp-aes esp-sha-hmac

mode transport

crypto ipsec profile dmvpnprofile

set transform-set DMVPN

interface Tunnel10

description Connection of HO

ip address 10.10.10.1 255.255.255.0

no ip redirects

ip mtu 1436

ip nhrp authentication XXXX

ip nhrp map multicast dynamic

ip nhrp network-id 6666

ip nhrp holdtime 600

ip ospf network broadcast

ip ospf priority 3

delay 1000

tunnel source FastEthernet0/1

tunnel mode gre multipoint

tunnel key 67876