[c-nsp] 12.4(11)T QoS problems (again)

Tue Jul 31 04:36:12 EDT 2007

We have one G1 that was just implemented with 15T1.  We also have 2 running 
11T and 1 running 9T.  The 2 running 11T have, IMO, very high CPU (60+% 
average durning middle of day).  The 9T barely runs 20%.

I am planning on upgrading one of the 11Ts to see if the CPU issue was 
resolved.  I will post up when I get some data.

tv
----- Original Message ----- 
From: "Rodney Dunn" <rodunn at cisco.com>
To: "Rafi Sadowsky" <rafi at noc.ilan.net.il>
Cc: <cisco-nsp at puck.nether.net>; "Hank Nussbacher" <hank at efes.iucc.ac.il>
Sent: Monday, July 30, 2007 8:15 AM
Subject: Re: [c-nsp] 12.4(11)T QoS problems (again)

> On Sat, Jul 28, 2007 at 07:18:24AM +0300, Rafi Sadowsky wrote:
>> Hi Rodney,
>>
>>  FYI: The router is a 7206VXR NPE-G1 with most of traffic between 2 of 
>> the
>> NPE GbE interfaces
>
> Ok. Good because the CPU change if there is one significant would
> show up between the two versions.
>
>>
>> Any particular reason you mentioned a NPE-G2 ?
>
> Search the archives for the NPE-G2 measurement discussions
> we've had.
>
> Rodney
>
>>
>>
>> -- 
>> Regards
>> Rafi
>>
>> [sh ver]
>> Cisco IOS Software, 7200 Software (C7200-ADVIPSERVICESK9-M), Version
>> 12.4(4)T1, RELEASE SOFTWARE (fc4)
>> Technical Support: http://www.cisco.com/techsupport
>> Copyright (c) 1986-2005 by Cisco Systems, Inc.
>> Compiled Wed 21-Dec-05 22:58 by ccai
>>
>> ROM: System Bootstrap, Version 12.3(4r)T3, RELEASE SOFTWARE (fc1)
>> BOOTLDR: 7200 Software (C7200-KBOOT-M), Version 12.3(15), RELEASE 
>> SOFTWARE
>> (fc3)
>>
>> Tel-Aviv uptime is 1 week, 5 days, 1 minute
>> System returned to ROM by reload at 07:07:17 IDT Mon Jul 16 2007
>> System restarted at 07:09:50 IDT Mon Jul 16 2007
>> System image file is "disk2:c7200-advipservicesk9-mz.124-4.T1.bin"
>> Last reload reason: Reload Command
>>
>> Cisco 7206VXR (NPE-G1) processor (revision B) with 491520K/32768K bytes 
>> of
>> memory.
>> Processor board ID 26812591
>> SB-1 CPU at 700MHz, Implementation 1025, Rev 0.2, 512KB L2 Cache
>> 6 slot VXR midplane, Version 2.6
>>
>> Last reset from power-on
>>
>> [snipped]
>>
>> PCI bus mb1 (Slots 1, 3 and 5) has a capacity of 600 bandwidth points.
>> [snipped]
>> PCI bus mb2 (Slots 2, 4 and 6) has a capacity of 600 bandwidth points.
>> [snipped]
>>
>>
>> 4 Ethernet interfaces
>> 2 FastEthernet interfaces
>> 3 Gigabit Ethernet interfaces
>> 8 Serial interfaces
>> 1 Packet over SONET interface
>> 509K bytes of NVRAM.
>>
>> 125952K bytes of ATA PCMCIA card at slot 2 (Sector size 512 bytes).
>> 16384K bytes of Flash internal SIMM (Sector size 256K).
>> Configuration register is 0x2102
>>
>> -- 
>> Regards,
>> Rafi
>>
>> On Fri, 27 Jul 2007, Rodney Dunn wrote:
>>
>> >Date: Fri, 27 Jul 2007 08:52:26 -0400
>> >From: Rodney Dunn <rodunn at cisco.com>
>> >To: Hank Nussbacher <hank at efes.iucc.ac.il>
>> >Cc: cisco-nsp at puck.nether.net, nocplus at noc.ilan.net.il
>> >Subject: Re: [c-nsp] 12.4(11)T QoS problems (again)
>> >
>> >I'd be interested to know this as well. I helped draft the FN on this
>> >one to make sure they were clear.
>> >
>> >In the fixes that went in 15T1 there was really only one, rather large,
>> >change to improve the dataplane performance. Others were mostly bug
>> >functionality problems.
>> >
>> >The NPE-G2 performance comparisons are harder given our previous
>> >discussions around how it does CPU measurements.
>> >
>> >Rodney
>> >
>> >
>> >On Fri, Jul 27, 2007 at 07:10:06AM +0300, Hank Nussbacher wrote:
>> >>Cisco Field Notice: Field Notice: FN - 62854 - Cisco IOS - Performance
>> >>Degradation and Reloads Possible When Using Quality of Service Features 
>> >>in
>> >>Version 12.4(11)T - July 26, 2007
>> >>
>> >>http://www.cisco.com/en/US/customer/products/ps6441/products_field_notice09186a008088cc2f.shtml
>> >>
>> >>"Workaround/Solution
>> >>There is no workaround that avoids all possible symptoms. A complete
>> >>solution is expected to be available in Cisco IOS version 12.4(15)T1. 
>> >>To
>> >>avoid the symptoms, users may downgrade to a pre-12.4(11)T release or
>> >>upgrade to 12.4(15)T1 when it becomes available. Cisco strongly
>> >>discourages deploying an IOS 12.4(11)T release with QoS features 
>> >>enabled
>> >>due to the potential severity of symptoms."
>> >>
>> >>We went to 12.4(15)T around the beginning of July (it is now a Deferred
>> >>Release) and it did *not* help so we went back to 12.4(4)T1 which does 
>> >>fix
>> >>the performance problems.  One can see the exact change dates via this
>> >>MRTG CPU graph: http://noc.ilan.net.il/stats/ILAN-CPU/tau-7206-cpu.html
>> >>
>> >>I see 12.4(15)T1 came out July 20.  Has anyone tested it (non-Cisco) 
>> >>and
>> >>found that it does solve all performance problems?
>> >>
>> >>-Hank
>> >>
>> >>_______________________________________________
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>> >
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