I am witnessing a weird situation and not sure where else to look. A tunnel has refused to come up between an C2811 and a C1811. I have looked and looked like the whole day! I hate obfuscation, but I have done some. I can avail the obfuscated details privately:-)




C1811#sh runn int tunnel 50
Building configuration...

Current configuration : 191 bytes
!
interface Tunnel50
 description Inet test to C2811
 ip address 192.168.55.197 255.255.255.252
 keepalive 5 2
 tunnel source Vlan5
 tunnel destination 85.9x.x.23
 tunnel key 98745612
end


C1811#sh int vlan 5
Vlan5 is up, line protocol is up
  Hardware is EtherSVI, address is 001e.f7d4.8750 (bia 001e.f7d4.8750)
  Internet address is 41.x.x.1x/30
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:39:52, 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: 0/40 (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
     1200 packets output, 72000 bytes, 0 underruns
     0 output errors, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out


C1811#sh int tunn 50
Tunnel50 is up, line protocol is down
  Hardware is Tunnel
  Description: Inet test to TCRB
  Internet address is 192.168.55.197/30
  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 2
  Tunnel source 41.x.x.1x (Vlan5), destination 85.9x.x.23
  Tunnel protocol/transport GRE/IP
    Key 0x272CBD89, sequencing disabled
    Checksumming of packets disabled
  Tunnel TTL 255
  Fast tunneling enabled
  Tunnel transmit bandwidth 8000 (kbps)
  Tunnel receive bandwidth 8000 (kbps)
  Last input 00:35:35, output 01:40:44, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2349
  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
     13 packets input, 728 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
     63 packets output, 5310 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out



On the other side (2811):

C2811-Telecity#sh runn int tunn 50
Building configuration...

Current configuration : 267 bytes
!
interface Tunnel50
 description Inet test to C1811
 ip address 192.168.55.198 255.255.255.252
 ip flow ingress
 ip flow egress
 qos pre-classify
 keepalive 5 2
 tunnel source 85.9x.x.23
 tunnel destination 41.x.x.1x
 tunnel key 98745612
end

C2811-Telecity#sh int tunn 50
Tunnel50 is up, line protocol is down
  Hardware is Tunnel
  Description: Inet test to C1811
  Internet address is 192.168.55.198/30
  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 2
  Tunnel source 85.9x.x.23, destination 41.x.x.1x
  Tunnel protocol/transport GRE/IP
    Key 0x272CBD89, 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 00:00:02, 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
     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
     3365 packets output, 188673 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out



--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Damn!!