Cisco 881 router needs to be restarted always

Rommel Pableo · ‎03-17-2013

Hi,

I have a Cisco 881 router wherein everytime a hotel is getting no internet connection, they will just restart the router and all came back to normal. ISP is not an issue here since we are getting connectiong everytime we restart. I tried issuing show interface commands and I cannot see errors on the interface. I suspect this issue is due to high load utilization of the router that requires restarting to return to normal. Please give me some ideas on this.

show interfaces fastEthernet 2

FastEthernet2 is up, line protocol is up

Hardware is Fast Ethernet, address is d0d0.fde7.c70a (bia d0d0.fde7.c70a)

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

reliability 255/255, txload 5/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s

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 185000 bits/sec, 172 packets/sec

5 minute output rate 2212000 bits/sec, 234 packets/sec

29612338 packets input, 3259648497 bytes, 0 no buffer

Received 19024 broadcasts, 0 runts, 0 giants, 0 throttles

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

0 input packets with dribble condition detected

38230113 packets output, 1942962425 bytes, 0 underruns

0 output errors, 0 collisions, 2 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

show interfaces fastEthernet 4

FastEthernet4 is up, line protocol is up

Hardware is PQII_PRO_UEC, address is d0d0.fde7.c70c (bia d0d0.fde7.c70c)

Internet address is 42.61.215.115/22

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

reliability 255/255, txload 1/255, rxload 5/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, 100BaseTX/FX

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 2167000 bits/sec, 225 packets/sec

5 minute output rate 171000 bits/sec, 164 packets/sec

38198543 packets input, 1797012792 bytes

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

6 input errors, 0 CRC, 0 frame, 0 overrun, 6 ignored

0 watchdog

0 input packets with dribble condition detected

29402479 packets output, 3061565945 bytes, 0 underruns

0 output errors, 0 collisions, 4 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

Rommel Pableo · ‎03-17-2013

just now i get this error .

the fragment table has reached its maximum threshold 16". What does this means and what is the impact of it?

Is this the reason why we are getting this problem?

Leo Laohoo · ‎03-17-2013

Can you post the output to the command "sh interface ".

Rommel Pableo · ‎03-17-2013

hi,

Below is the interface to ISP.

show interfaces fastEthernet 4

FastEthernet4 is up, line protocol is up

Hardware is PQII_PRO_UEC, address is d0d0.fde7.c70c (bia d0d0.fde7.c70c)

Internet address is 42.61.215.115/22

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

reliability 255/255, txload 1/255, rxload 5/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Full-duplex, 100Mb/s, 100BaseTX/FX

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 2167000 bits/sec, 225 packets/sec

5 minute output rate 171000 bits/sec, 164 packets/sec

38198543 packets input, 1797012792 bytes

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

6 input errors, 0 CRC, 0 frame, 0 overrun, 6 ignored

0 watchdog

0 input packets with dribble condition detected

29402479 packets output, 3061565945 bytes, 0 underruns

0 output errors, 0 collisions, 4 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

Leo Laohoo · ‎03-17-2013

I can't see any issues here (other than the "6 input errors").

Before you reboot the router next time, can you get a "sh tech" output and post it?

I don't believe it's a high-utilization issue.

johnlloyd_13 · ‎03-18-2013

hi rommel,

please post your show version. it could be an IOS issue.

Yasien Adams · ‎03-18-2013

hi rommel,

i had the same problem, and also ruled out isp, cabling and other usual suspects as the problem.

i was left with IOS upgrade as the last step, but i also had the luxury of a spare router on hand.

i installed the spare router and its been working fine.

still havent done the IOS upgrade or returned the original router back to production, but hoping to do soon.

Rommel Pableo · ‎03-18-2013

hi johnlloyd,

Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.0(1)M3, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Compiled Sun 18-Jul-10 08:20 by prod_rel_team

ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)

Scarlet_Guest uptime is 1 day, 13 hours, 24 minutes

System returned to ROM by power-on

System image file is "flash:c880data-universalk9-mz.150-1.M3.bin"

Last reload type: Normal Reload

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

--More-- A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco 881 (MPC8300) processor (revision 1.0) with 236544K/25600K bytes of memory.

Processor board ID FHK14347312

5 FastEthernet interfaces

1 Virtual Private Network (VPN) Module

256K bytes of non-volatile configuration memory.

125440K bytes of ATA CompactFlash (Read/Write)

License Info:

License UDI:

-------------------------------------------------

Device# PID SN

-------------------------------------------------

--More-- *0 CISCO881-K9 FHK14347312

License Information for 'c880-data'

License Level: advsecurity Type: Permanent

Next reboot license Level: advsecurity

Configuration register is 0x2102

Rommel Pableo · ‎03-18-2013

@leolaohoo,

I will try the show tech if we encounter the same issue again. In addition, we are getting this problem not everyday. Sometimes, one day in a week it the problem occurs and about 2 to three times the router need to be restarted. There are some days that the router is running smoothly and no problem.

PS: I tried resetting the WAN interface by "shutting down" and "no shutdown" command and it also settles the problem.

Any idea?

Leo Laohoo · ‎03-18-2013

PS: I tried resetting the WAN interface by "shutting down" and "no shutdown" command and it also settles the problem.

Smells like an IOS bug if you have to reset the WAN interface.

Rommel Pableo · ‎03-18-2013

@leolaohoo,

based on the show version I shown above, is there any issue on it?

i havent tried upgrading the IOS before. Usually how long will it take for the upgrade to complete?

Leo Laohoo · ‎03-18-2013

Depends on your link. Normally it takes about 15 minutes to upload the IOS from your computer to the router on a WAN link. Then you have about 5 to 7 minutes for the router to boot. Then if you have TACACS then add another 5 minutes.

johnlloyd_13 · ‎03-18-2013

leo,

isn't it advisable to do an IOS upgrade phyically (onsite)? i'm so afraid to this stuff remotely.

Rommel Pableo · ‎03-18-2013

So, Im left with only one option but to upgrade the IOS? How about upgrading the firmware first? Will it help?

Leo Laohoo · ‎03-18-2013

Won't make a difference.