[Insight?] OutPut Drops Cisco 7206VXR

Tue Oct 26 23:18:20 UTC 2004

Isn't weighted fair queueing generally a bad idea on a LAN interface? 

Chuck Church
Lead Design Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services - Design & Implementation Team
1210 N. Parker Rd.
Greenville, SC 29609
Home office: 864-335-9473
Cell: 703-819-3495
cchurch at netcogov.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D 

-----Original Message-----
From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
Gyorfy, Shawn
Sent: Tuesday, October 26, 2004 10:49 AM
To: 'jkreger at lwolenczak.net'
Cc: nanog at merit.edu
Subject: RE: [Insight?] OutPut Drops Cisco 7206VXR

Yeah - we have traffic shaping:

policy-map Outbound-Transmission-To-Core   (We have 10)
  class Expedited-Forwarding-To-Core
   priority percent 50
  class Hanover_13364_14025_37272-TS-To-Core
   shape average 1536000 192000 15000
  class Queller_3266_3268_30989-TS-To-Core
   shape average 700000 87500 15000
.
.
.
(10)

FastEthernet0/0 is up, line protocol is up 
  Hardware is DEC21140A, address is 0001.636e.1c00 (bia 0001.636e.1c00)
  Description: Connected to Extreme Summit48
  Internet address is 
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, 
     reliability 255/255, txload 12/255, rxload 3/255
  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 00:00:21, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:37:12
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
5397
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
     Conversations  0/82/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 25000 kilobits/sec
  5 minute input rate 1505000 bits/sec, 979 packets/sec
  5 minute output rate 5084000 bits/sec, 1590 packets/sec
     2028319 packets input, 434456929 bytes
     Received 3 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     3453733 packets output, 1359654191 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

Serial2/0 is up, line protocol is up 
  Hardware is M1T-T3+ pa
  Description: ny-0200 V#51HFGL605916 (DS3 to 39 Broadway POP)
  Internet address is 
  MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec, 
     reliability 255/255, txload 8/255, rxload 29/255
  Encapsulation PPP, LCP Open
  Open: CDPCP, IPCP, crc 16, loopback not set
  Keepalive set (10 sec)
  Restart-Delay is 0 secs
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:37:49
  Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops) 
     Conversations  0/10/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 11052 kilobits/sec
  5 minute input rate 5029000 bits/sec, 1584 packets/sec
  5 minute output rate 1437000 bits/sec, 966 packets/sec
     3460149 packets input, 1351120603 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
              0 parity
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     2005303 packets output, 418156501 bytes, 0 underruns
     0 output errors, 0 applique, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
   rxLOS inactive, rxLOF inactive, rxAIS inactive
   txAIS inactive, rxRAI inactive, txRAI inactive

-----Original Message-----
From: jkreger at lwolenczak.net [mailto:jkreger at lwolenczak.net] 
Sent: Tuesday, October 26, 2004 10:55 AM
To: Gyorfy, Shawn
Subject: Re: [Insight?] OutPut Drops Cisco 7206VXR

Do you have any rate limiting on the Ethernet interface?

The bus error.. I would say let cisco just replace your gear... that
dosen't sound good.  How is the bandwidth usage soo different?  That
dosen't sound right....

-Justin
 On Tue, 26 Oct 2004, Gyorfy, Shawn wrote:

>
> What's up all,
>
> I have a question, maybe some have experienced this before- let me
paint
the
> picture for you first - We are running VoIP- customer's are
experiencing
> static.
>
> I have a DS3 going for a Cisco 10k router to a Cisco 7206VXR M2T-T3+
pa
> Interface.  As of right now, the current usage is about 5.5Mbps with
an
> input rate of about 1425pps and output rate of 756.
>
> The Fast Ethernet is connected to an Extreme Switch.  The FastE's
usage
> right now is about 20Mbps with an input rate of 868pps and an output
of
> 1541pps.
>
> On the FastE - we are seeing Output drops.  They were at a constant
> interval, when we were running IOS c7200-p-mz.123-9a.  As per cisco,
we
> upgraded the IOS to c7200-p-mz.123-10 because of a possible buffer
leak.
> Rather than just upgrading the IOS on the current box, we swapped it
out
to
> a new box and still recv output drops and Now the puppy decides to
reboot
> every 15 minutes returning a, "System returned to ROM by bus error at
PC
> 0x60132C44, address 0xE16E2CD at 13:38:47 UTC Tue Oct 26 2004"
>
> Questions:  (a) What would be causing the output errors - can't the
> processor and memory handle that?
> 		(b) what is that bus error?
>
>
> Thanks all,
>
> shawn.
>
>
>
>
>
>