[c-nsp] Intermittent 100% backplane utilisation on Cisco 6500

[Patrick Wu]

Thanks, so was the SUP module or the GE module that was faulty?

On Thu, Nov 13, 2008 at 6:15 PM, Nitzan Tzelniker <
nitzan.tzelniker at gmail.com> wrote:

> I see this issue in the past on sup720 it was probably faulty module (we
> replace some of them and the spikes stop )
>
> Nitzan
>
> On Thu, Nov 13, 2008 at 03:10, Patrick Wu <pwu828 at gmail.com> wrote:
>
>> Hi,
>>
>>
>>
>> I'm currently having issues with one of the Cisco 6506 in the network, it
>> is
>> running HSRP with another 6506 and also running OSPF/BGP. Recently, I this
>> 6506 is having intermittent 100% backplane utilisation, which caused
>> everything to stop responding for a couple of seconds.
>>
>>
>>
>> As a result, spanning tree recalculation and HSRP failover kicked in, and
>> caused interruptions in many parts of the network.
>>
>>
>>
>> What I don't understand is what caused the 100% utilisation, googling
>> reveals that it could be caused by spanning tree loops and broadcast
>> storms.
>> But I have already tuned down the storm-control on broadcast on all ports
>> into the 6506, and I don't think there are any loops in the network.
>>
>>
>>
>> Unlike an DDoS attack where the 100% utilisation is continuous, it just
>> peaks at 100% for 1 or 2 seconds and comes back down... the logs don't
>> seem
>> to show much
>>
>>
>>
>> Any one have similar experience or is able to point me in the right
>> direction would be greatly appreciated! Thanks.
>>
>>
>>
>> Here's the show version and show module:
>>
>>
>>
>> show version
>>
>> Cisco Internetwork Operating System Software
>>
>> IOS (tm) c6sup1_rp Software (c6sup1_rp-PSV-M), Version 12.1(22)E1, EARLY
>> DEPLOYMENT RELEASE SOFTWARE (fc1)
>>
>> Technical Support:
>> http://www.cisco.com/techsupport<
>> http://www.cisco.com/techsupport%5B/url%5D>
>>
>>
>> Copyright (c) 1986-2004 by cisco Systems, Inc.
>>
>> Compiled Fri 16-Apr-04 10:13 by pwade
>>
>> Image text-base: 0x60020F90, data-base: 0x616EA000
>>
>>
>>
>> ROM: System Bootstrap, Version 12.0(3)XE, RELEASE SOFTWARE
>>
>> BOOTLDR: MSFC Software (C6MSFC-BOOT-M), Version 12.1(3a)E4, EARLY
>> DEPLOYMENT
>> RELEASE SOFTWARE (fc1)
>>
>>
>>
>> xxxxxxxx uptime is 23 weeks, 5 days, 27 minutes
>>
>> Time since xxxxxxxx switched to active is 23 weeks, 5 days, 29 minutes
>>
>> System returned to ROM by power-on (SP by reload)
>>
>> System restarted at 09:34:31 AEST Sat May 31 2008
>>
>> System image file is "slot0:c6sup11-psv-mz.121-22.E1"
>>
>>
>>
>> cisco WS-C6506 (R5000) processor (revision 3.0) with 114688K/16384K bytes
>> of
>> memory.
>>
>> Processor board ID TBA05290886
>>
>> R5000 CPU at 200Mhz, Implementation 35, Rev 2.1
>>
>> Last reset from power-on
>>
>> X.25 software, Version 3.0.0.
>>
>> Bridging software.
>>
>> 146 Virtual Ethernet/IEEE 802.3  interface(s)
>>
>> 48 FastEthernet/IEEE 802.3 interface(s)
>>
>> 10 Gigabit Ethernet/IEEE 802.3 interface(s)
>>
>> 381K bytes of non-volatile configuration memory.
>>
>> 4096K bytes of packet SRAM memory.
>>
>>
>>
>> 16384K bytes of Flash internal SIMM (Sector size 256K).
>>
>> Configuration register is 0x2102
>>
>>
>>
>>
>>
>> show module
>>
>> Mod Ports Card Type                              Model              Serial
>> No.
>>
>> --- ----- -------------------------------------- ------------------
>> -----------
>>
>>  1    2  Cat 6k sup 1 Enhanced QoS (Active)     WS-X6K-SUP1A-2GE
>> SAD03414219
>>
>>  3   48  48 port 10/100 mb RJ-45 ethernet       WS-X6248-RJ-45
>> SAD03430896
>>
>>  5    8  8 port 1000mb GBIC Enhanced QoS        WS-X6408A-GBIC
>> SAD05040L5K
>>
>>
>>
>> Mod MAC addresses                       Hw    Fw           Sw
>> Status
>>
>> --- ---------------------------------- ------ ------------ ------------
>> -------
>>
>>  1  00d0.bcee.59a8 to 00d0.bcee.59a9   3.2   5.3(1)       12.1(22)E1   Ok
>>
>>  3  0030.9613.f314 to 0030.9613.f343   1.1   4.2(0.24)VAI 8.3(0.111)TF Ok
>>
>>  5  0002.fc25.3224 to 0002.fc25.322b   1.6   5.4(2)       8.3(0.111)TF Ok
>>
>>
>>
>> Mod Sub-Module                  Model           Serial           Hw
>> Status
>>
>> --- --------------------------- --------------- --------------- -------
>> -------
>>
>>  1 Policy Feature Card         WS-F6K-PFC      SAD03424981      1.0    Ok
>>
>>  1 MSFC Cat6k daughterboard    WS-F6K-MSFC     SAD03427635      1.4    Ok
>>
>>
>>
>> Mod Online Diag Status
>>
>> --- -------------------
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>
>