Re:Cisco 2900 router keeps loosing internet connection

bhattdarsh · ‎01-15-2014

Hello,

Our cisco 2911 router keeps loosing Internet connection every month or two. When I checked the lights on the router, all lights were ON except "activity" light. I think router is getting freeze or something. I always have to reboot the router to bring it back ON. I can't check the logs either as we don' t have syslog server and after reboot, router erases all the logs. Has anyone experienced this kind of issue before? or does anyone know the solution?

Thanks in advance.

mvsheik123 · ‎01-15-2014

Hi Darshan,

When it 'freezes' - did you try to log in (console/ssh/telnet) and check the router logs, CPU usage etc? hat information may help you fix the issue.

Thx

MS

bhattdarsh · ‎01-15-2014

Hi MS,

When it freezes, I can't login to router via console/ssh/telnet. Becauase it goes offline.

Thanks,

Leo Laohoo · ‎01-15-2014

Post the output to the following command: sh interface

bhattdarsh · ‎01-15-2014

Embedded-Service-Engine0/0 is administratively down, line protocol is down

Hardware is Embedded Service Engine, address is 0000.0000.0000 (bia 0000.0000.0000)

MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

ARP type: ARPA, ARP Timeout 04:00:00

Last input never, output never, output hang never

Last clearing of "show interface" counters never

Input queue: 0/64/0/0 (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 IP multicasts)

0 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

GigabitEthernet0/0 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full Duplex, 1Gbps, media type is RJ45

output flow-control is unsupported, input flow-control is unsupported

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, 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

Output queue: 0/40 (size/max)

5 minute input rate 53000 bits/sec, 40 packets/sec

5 minute output rate 14000 bits/sec, 15 packets/sec

116539 packets input, 18886287 bytes, 0 no buffer

Received 93015 broadcasts (5713 IP multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 46792 multicast, 0 pause input

41926 packets output, 5054872 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

110 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

GigabitEthernet0/0.1 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.20.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 1.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.21 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.21.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 21.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.22 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.22.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 22.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.23 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.23.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 23.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.24 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.24.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 24.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.25 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.25.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 25.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.26 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.26.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 26.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.27 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.27.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 27.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.28 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.28.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 28.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.29 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.29.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 29.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/0.30 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd08 (bia 7c69.f629.fd08)

Internet address is 10.30.0.3/16

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation 802.1Q Virtual LAN, Vlan ID 30.

ARP type: ARPA, ARP Timeout 04:00:00

Keepalive set (10 sec)

Last clearing of "show interface" counters never

GigabitEthernet0/1 is up, line protocol is up

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd09 (bia 7c69.f629.fd09)

Internet address is 115.70.207.75/31

MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Half Duplex, 100Mbps, media type is RJ45

output flow-control is unsupported, input flow-control is unsupported

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:02, output 00:00:05, 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

594 packets input, 47340 bytes, 0 no buffer

Received 220 broadcasts (0 IP multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 0 multicast, 0 pause input

773 packets output, 83263 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

GigabitEthernet0/2 is administratively down, line protocol is down

Hardware is CN Gigabit Ethernet, address is 7c69.f629.fd0a (bia 7c69.f629.fd0a)

MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,

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

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Auto Duplex, Auto Speed, media type is RJ45

output flow-control is unsupported, input flow-control is unsupported

ARP type: ARPA, ARP Timeout 04:00:00

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: 0/40 (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 IP multicasts)

0 runts, 0 giants, 0 throttles

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

0 watchdog, 0 multicast, 0 pause input

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 unknown protocol drops

0 babbles, 0 late collision, 0 deferred

0 lost carrier, 0 no carrier, 0 pause output

0 output buffer failures, 0 output buffers swapped out

Dialer0 is up (spoofing), line protocol is up (spoofing)

Hardware is Unknown

MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,

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

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

DTR is pulsed for 1 seconds on reset

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: 0/40 (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 packets output, 0 bytes

NVI0 is up, line protocol is up

Hardware is NVI

Interface is unnumbered. Using address of GigabitEthernet0/0.1 (10.20.0.3)

MTU 1514 bytes, BW 56 Kbit/sec, DLY 5000 usec,

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

Encapsulation UNKNOWN, loopback not set

Keepalive set (10 sec)

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

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 IP multicasts)

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 unknown protocol drops

0 output buffer failures, 0 output buffers swapped out

Leo Laohoo · ‎01-15-2014

Ok, so it's a DSL link. Then post this command: sh atm interface

bhattdarsh · ‎01-15-2014

The router is not recognising this command.

Leo Laohoo · ‎01-15-2014

Do you have a DSL model in front of the router?

bhattdarsh · ‎01-15-2014

You mean DSL modem. if so then yes, modem is connected to the router.

Leo Laohoo · ‎01-16-2014

You mean DSL modem. if so then yes, modem is connected to the router.

Because you have a DSL modem this makes troubleshooting a bit harder. With a DSL modem and your router acting as a pass-through it is very difficult to determine if your copper line is degraded.

If you are able to somehow pull the NOISE and ATTENUATION value off the DSL modem that would be a good start.

Ashish Arora · ‎01-16-2014

Darshan,

I looked at the thread and checked the configuration. There could be couple of potential reasons for this problem :however I would like you to plrEase answer the following:-

1. As per the configuration ,it seems like this setup is PPPoE in which things are connected as follow :-

Router(fe)-----(fe)modem(atm/rj14)-----telco.

Correct me if wrong.

2. If step 1 is correct , which fe/ge interface connects to the router , send me the output of show run interface gig/fa and show run int dialer 0.

3. What I gonna check if this is a interface issue or router.,

Send me output of show interface gig(number).

4. In case if this is an intermittent issue , have you tried to replace the modem and monitor the behaviour ?

5.I will have to check any specific trap and then will create EEM script to check the outputs of debug pppoe events and debug PPP negotiation .

Thses debugs will help me to identify the cause of internet failure.

6. Since you reported issues only with internet when router freezes , I am hoping at the same instant you are not able to send local traffic across it , if yes please let me know what is evidence of claiming issues to the DSL only , are you facing anything on the modem or any suspeced activity which points to things it is a DSL issue.

7. You should also try to replace the router and see if that helps.

8. We can check any software vulnerability in the platform ,please share the show version output so that I can check the IOS version.

9.,since it is an intermittent , only action is to perform EEm and collect logs during issue occurance.

Thank you

Ashish Arora

usasigcis · ‎01-16-2014

Good steps
Also I d check for a possible bug in the code

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