Woken up to a weird problem and it's driving me nuts.. This has been working until today. NO changes at all have been made in several months. The tunnel has refused to come up for some strange reason. I have even rebooted the routers. One had been up for 1.5 years, even... *Router1:* C2811-Telecity#sh interfaces tunnel 49 Tunnel49 is up, line protocol is down <=================== Hardware is Tunnel Description: TitanAir JTL Internet address is 192.168.55.82/30 MTU 1514 bytes, BW 512 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive set (5 sec), retries 10 Tunnel source 85.90.242.30, destination 197.232.31.83 Tunnel protocol/transport GRE/IP Key 0x8XXXXXXX, sequencing disabled Checksumming of packets disabled Tunnel TTL 255 Fast tunneling enabled Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps) Last input 00:00:00, output 00:00:04, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1 Queueing strategy: fifo (QOS pre-classification) 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 30 packets input, 1680 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 31 packets output, 1808 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out C2811-Telecity#ping 197.232.31.83 so 85.90.242.30 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 197.232.31.83, timeout is 2 seconds: Packet sent with a source address of 85.90.242.30 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 188/188/188 ms C2811-Telecity#sh running-config interface tunnel 49 Building configuration... Current configuration : 312 bytes ! interface Tunnel49 description TitanAir JTL bandwidth 512 ip address 192.168.55.82 255.255.255.252 ip access-group Kenya in ip mtu 1300 ip route-cache flow ip tcp adjust-mss 1200 qos pre-classify keepalive 5 2 tunnel source 85.90.242.30 tunnel destination 197.232.31.83 tunnel key XXXXXXXXXXX end *Router 2:* C1811-TitanAir#sh interfaces tunnel 49 Tunnel49 is up, line protocol is down Hardware is Tunnel Description: Inet to TCRB Internet address is 192.168.55.81/30 MTU 1514 bytes, BW 9 Kbit, DLY 500000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation TUNNEL, loopback not set Keepalive set (5 sec), retries 10 Tunnel source 197.232.31.83, destination 85.90.242.30 Tunnel protocol/transport GRE/IP Key 0x8XXXXXXX, sequencing disabled Checksumming of packets disabled Tunnel TTL 255 Fast tunneling enabled Tunnel transmit bandwidth 8000 (kbps) Tunnel receive bandwidth 8000 (kbps) Last input never, output 00:00:00, 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 (QOS pre-classification) 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 207 packets output, 12306 bytes, 0 underruns 0 output errors, 0 collisions, 0 interface resets 0 output buffer failures, 0 output buffers swapped out C1811-TitanAir#ping 85.90.242.30 source 197.232.31.83 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 85.90.242.30, timeout is 2 seconds: Packet sent with a source address of 197.232.31.83 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 188/188/188 ms C1811-TitanAir#sh running-config interface tunnel 49 Building configuration... Current configuration : 300 bytes ! interface Tunnel49 description Inet to TCRB ip address 192.168.55.81 255.255.255.252 ip access-group netbios out ip mtu 1300 ip route-cache flow ip tcp adjust-mss 1200 qos pre-classify keepalive 5 2 tunnel source 197.232.31.83 tunnel destination 85.90.242.30 tunnel key XXXXXXXXXXXXXXX end -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254733744121/+254722743223 "I can't hear you -- I'm using the scrambler."