output drops and input errors on a 7204 with NPE 300

[moipbaaklini]

Hi,

my router, a Cisco 7204 with NPE 300, is experiencing output drops and input errors on a fastethernet interface.

I have a 100Mbps connection with less than 15Mbps utilization at peak times.

What could the problem be?

FastEthernet1/0 is up, line protocol is up
  Hardware is DEC21140, address is 0014.a985.1a1c (bia 0014.a985.1a1c)
  Internet address is 38.102.66.134/30
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 3/255, rxload 1/255
  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 18:47:28
  Input queue: 0/75/31/25 (size/max/drops/flushes); Total output drops: 370
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 332000 bits/sec, 251 packets/sec
  5 minute output rate 1314000 bits/sec, 304 packets/sec
     54381776 packets input, 12458531314 bytes
     Received 0 broadcasts, 0 runts, 0 giants, 13 throttles
     1074 input errors, 0 CRC, 0 frame, 6 overrun, 1068 ignored
     0 watchdog
     0 input packets with dribble condition detected
     70598367 packets output, 58946331445 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

Thanks,

JP

[paolo bevilacqua]

For 12.2(25)S15

http://www.cisco.com/cisco/software/release.html?mdfid=268437992&flowid=11988&dvdid=273568711&softwareid=280805680&release=12.2.25S15&relind=AVAILABLE&rellifecycle=ED&reltype=all

[Joseph W. Doherty]

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Posting

How exactly do you meaure 15 Mbps at peak times?

If this is an hand-off to a WAN connection of some kind, do you have 100 Mbps end-to-end, dedicated (i.e. like leased-line)?

The  fact that you have output drops shows occasional bursting to line rate  that overflows your queue, although drops are such a small %, and queue  is so small for 100 Mbps, unlikely it alone causes performance issue.

As  to the input drops, they, on this platfrom, I believe, represent the  router having difficulty keeping up; which makes sense as a NPE 300  could be maxed out for 100 Mbps duplex.  These too are a small %.

If you're having VoIP performance issues, would suspect there's a larger issue than the few drops we're seeing.

[paolo bevilacqua]

JosephDoherty wrote:
Disclaimer
The Author of this posting offers the information  contained within this posting without consideration and with the  reader's understanding that there's no implied or expressed suitability  or fitness for any purpose.  Information provided is for informational  purposes only and should not be construed as rendering professional  advice of any kind.  Usage of this posting's information is solely at  reader's own risk
Liability Disclaimer
In no event shall Author be liable for any damages  whatsoever (including, without limitation, damages for loss of use, data  or profit) arising out of the use or inability to use the posting's  information even if Author has been advised of the possibility of such  damage.

If you feel the need to post such a preamble before each post of your, I'd recommend you check with the forum Administrators about any legal aspects of contributing to the forum.

That much legalese seems frankly excessive.