Hi!
we have connected our UC540 to CME on a 2811 router via IP-IP tunnel as DMVPN has some restrictions at the other end's ISP.
the issue is the tunnel is getting discoonnected frequently while it is showing that tunnel and line protocol both are up.
sh int tu1
Tunnel1 is up, line protocol is up
Hardware is Tunnel
Description: ToTehran
Internet address is 10.10.1.1/24
MTU 17920 bytes, BW 100 Kbit/sec, DLY 50000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive set (10 sec), retries 3
Tunnel source X.X.X.X (FastEthernet0/0), destination Y.Y.Y.Y
Tunnel protocol/transport IP/IP (NOS)
Tunnel TTL 255
Tunnel transport MTU 1480 bytes
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 00:17:56, output 00:17:00, 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)
30 second input rate 0 bits/sec, 0 packets/sec
30 second output rate 0 bits/sec, 0 packets/sec
158 packets input, 13218 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
435 packets output, 35775 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
any idea how can I solve this problem?