[Insight?] OutPut Drops Cisco 7206VXR

Fri Oct 29 18:16:38 UTC 2004

Well, we took out the 'service-policy output map' on the FE which took the
interface from WFQ to FIFO.  There hasn't been an output drop in 5hrs.

Thanks,

shawn

-----Original Message-----
From: Gyorfy, Shawn 
Sent: Friday, October 29, 2004 9:13 AM
To: 'Majid Farid'; Church, Chuck; jkreger at lwolenczak.net
Subject: RE: [Insight?] OutPut Drops Cisco 7206VXR

The other side is an extreme summit 48 port switch.  We took of Auto
negotiate and hard set it to 100 Full.  We swapped the Extreme, adjusted the
buffers on the 7206, stopped using the FE on the board and used a card.

I see a lot if discussion about FIFO and WFQ - that's the only thing we
didn't do.  I can't try it right now - I looked at different routers (1700s,
2600, and 3600s), and they have FIFO. 

buffers small permanent 420
buffers small max-free 534
buffers small min-free 79
buffers middle permanent 437
buffers middle max-free 558
buffers middle min-free 84
buffers big permanent 93
buffers big max-free 133
buffers big min-free 28
buffers verybig permanent 16
buffers verybig max-free 24
buffers verybig min-free 5
buffers large permanent 0
buffers large max-free 0
buffers large min-free 0
buffers huge permanent 0
buffers huge max-free 0
buffers huge min-free 0 

-----Original Message-----
From: Majid Farid [mailto:MajidFarid at telecomottawa.com] 
Sent: Tuesday, October 26, 2004 10:09 PM
To: Church, Chuck; Gyorfy, Shawn; jkreger at lwolenczak.net
Cc: nanog at merit.edu
Subject: RE: [Insight?] OutPut Drops Cisco 7206VXR

What is the other side set to? Is it FIFO or WFQ?

Majid Farid
ISP Specialist
Telecom Ottawa Limited.
majidfarid at telecomottawa.com
[P] 613.225.4631 ext 7220
[F] 613.225.0636

-----Original Message-----
From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
Church, Chuck
Sent: Tuesday, October 26, 2004 7:18 PM
To: Gyorfy, Shawn; jkreger at lwolenczak.net
Cc: nanog at merit.edu
Subject: RE: [Insight?] OutPut Drops Cisco 7206VXR

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.
>
>
>
>
>
>