Chào mọi người .Hôm nay mình monitoring hệ thống mạng ,và gặp sự cố như thế này ,mong mọi người bàn luận và tìm cách khắc phục .Mình cấu hình tunnel 8 ,đi từ công ty đến KBNN .Mặc dù tunnel up nhưng không ping được IP tunnel đầu KBNN ,trong khi đó vẫn ping được IP destination bên KBNN (cổng thiết lập tunnel),do vậy không quảng bá được ospf trên tunnel 8 ,tunnel 8 không hiện trong bảng neighbor .Tunnel 8 được lập trên intf giga0/1.5 các thông số show :
+SHOW IP INT BRI
Interface IP-Address OK? Method Status Protocol
Async1 10.4.65.241 YES TFTP up up
GigabitEthernet0/0 10.4.65.241 YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM up up
GigabitEthernet0/1.4 172.19.12.74 YES NVRAM up up
GigabitEthernet0/1.5 172.19.12.66 YES NVRAM up up
GigabitEthernet0/1.6 unassigned YES unset up up
GigabitEthernet0/1.7 172.17.6.18 YES manual administratively down down
Serial0/0/0 unassigned YES NVRAM down down
Serial0/0/1 unassigned YES NVRAM down down
BVI2 172.19.12.82 YES NVRAM up up
Loopback0 172.17.7.247 YES NVRAM up up
Tunnel0 172.17.6.161 YES NVRAM up up
Tunnel1 172.17.6.165 YES NVRAM up up
Tunnel2 172.17.6.169 YES NVRAM up up
Tunnel3 172.17.6.173 YES NVRAM up up
Tunnel4 172.17.6.177 YES NVRAM up up
Tunnel5 172.17.6.181 YES NVRAM up up
Tunnel6 172.17.6.189 YES NVRAM up down
Tunnel7 172.17.6.185 YES NVRAM up up
Tunnel8 172.17.6.14 YES NVRAM up up
Tunnel9 172.17.6.10 YES NVRAM up up
+SHOW IP OS NEI
Neighbor ID Pri State Dead Time Address Interface
172.17.7.245 0 FULL/ - 00:00:37 172.17.6.186 Tunnel7
172.17.7.246 0 FULL/ - 00:00:39 172.17.6.182 Tunnel5
172.17.7.242 0 FULL/ - 00:00:38 172.17.6.178 Tunnel4
172.17.7.248 0 FULL/ - 00:00:37 172.17.6.174 Tunnel3
172.17.7.249 0 FULL/ - 00:00:36 172.17.6.170 Tunnel2
172.17.7.250 0 FULL/ - 00:00:37 172.17.6.166 Tunnel1
172.17.7.251 0 FULL/ - 00:00:35 172.17.6.162 Tunnel0
172.17.7.253 0 FULL/ - 00:00:35 172.17.6.9 Tunnel9
+SHOW INT TUNNEL 8
ctdan_rt01#show int tunnel 8
Tunnel8 is up, line protocol is up
Hardware is Tunnel
Description: Connect KBNN
Internet address is 172.17.6.14/30
MTU 1514 bytes, BW 256 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 172.19.12.66, destination 172.19.12.10
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255
Fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 00:10:39, 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: 9895
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
57987 packets output, 8109692 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
PING ĐỊA CHỈ IP TUNNEL ĐẦU XA :
ctdan_rt01#ping 172.17.6.13
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.17.6.13, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
+SHOW IP INT BRI
Interface IP-Address OK? Method Status Protocol
Async1 10.4.65.241 YES TFTP up up
GigabitEthernet0/0 10.4.65.241 YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM up up
GigabitEthernet0/1.4 172.19.12.74 YES NVRAM up up
GigabitEthernet0/1.5 172.19.12.66 YES NVRAM up up
GigabitEthernet0/1.6 unassigned YES unset up up
GigabitEthernet0/1.7 172.17.6.18 YES manual administratively down down
Serial0/0/0 unassigned YES NVRAM down down
Serial0/0/1 unassigned YES NVRAM down down
BVI2 172.19.12.82 YES NVRAM up up
Loopback0 172.17.7.247 YES NVRAM up up
Tunnel0 172.17.6.161 YES NVRAM up up
Tunnel1 172.17.6.165 YES NVRAM up up
Tunnel2 172.17.6.169 YES NVRAM up up
Tunnel3 172.17.6.173 YES NVRAM up up
Tunnel4 172.17.6.177 YES NVRAM up up
Tunnel5 172.17.6.181 YES NVRAM up up
Tunnel6 172.17.6.189 YES NVRAM up down
Tunnel7 172.17.6.185 YES NVRAM up up
Tunnel8 172.17.6.14 YES NVRAM up up
Tunnel9 172.17.6.10 YES NVRAM up up
+SHOW IP OS NEI
Neighbor ID Pri State Dead Time Address Interface
172.17.7.245 0 FULL/ - 00:00:37 172.17.6.186 Tunnel7
172.17.7.246 0 FULL/ - 00:00:39 172.17.6.182 Tunnel5
172.17.7.242 0 FULL/ - 00:00:38 172.17.6.178 Tunnel4
172.17.7.248 0 FULL/ - 00:00:37 172.17.6.174 Tunnel3
172.17.7.249 0 FULL/ - 00:00:36 172.17.6.170 Tunnel2
172.17.7.250 0 FULL/ - 00:00:37 172.17.6.166 Tunnel1
172.17.7.251 0 FULL/ - 00:00:35 172.17.6.162 Tunnel0
172.17.7.253 0 FULL/ - 00:00:35 172.17.6.9 Tunnel9
+SHOW INT TUNNEL 8
ctdan_rt01#show int tunnel 8
Tunnel8 is up, line protocol is up
Hardware is Tunnel
Description: Connect KBNN
Internet address is 172.17.6.14/30
MTU 1514 bytes, BW 256 Kbit, DLY 500000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 172.19.12.66, destination 172.19.12.10
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255
Fast tunneling enabled
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Last input 00:10:39, 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: 9895
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
57987 packets output, 8109692 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
PING ĐỊA CHỈ IP TUNNEL ĐẦU XA :
ctdan_rt01#ping 172.17.6.13
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.17.6.13, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
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