[c-nsp] 7600 RP Invalid Packet Drops

[Ivan]

Hi Antonio,

Thanks for the bug id.  I forgot to mention in my first post the 7600 in 
question is running 12.2(33)SRD4.  The bud info indicates it should be 
fixed in 12.2(33)SRD5.  Did you manage to upgrade your 7600 and fix the 
issue successfully?

Cheers

Ivan

On 30/Apr/2011 12:54 p.m., Antonio Soares wrote:
> I had this problem a few weeks ago. It was bug CSCte89940:
>
> +++++++++++++++
> IBC invalid packet drop on RSP 720
> Symptoms While pinging 7600 with RSP 720 we see some drops. These drops are
> counted under show ibc under "Invalid pkts dropped" Conditions The issue is
> seen on RSP 720 with SRD image. Workaround SRC05 and SRB07 do not have this
> issue, nor it is present with SUP 720.
> +++++++++++++++
>
>
> Regards,
>
> Antonio Soares, CCIE #18473 (R&S/SP)
> amsoares at netcabo.pt
> http://www.ccie18473.net
>
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ivan
> Sent: sábado, 30 de Abril de 2011 01:24
> To: cisco-nsp
> Subject: [c-nsp] 7600 RP Invalid Packet Drops
>
> I have a 7600 with a RSP720-3CXL-GE.  When pinging between the 7600 and
> any other device (I have tried a few) I am loosing packets - usually
> 5/10000 ish.
>
> I have eventually been able to match the number of lost packets with a
> counter from the output of "show ibc" which from my searching of the
> archives "shows you the inband interface leading to the RP CPU".  The
> counter is: Invalid pkts dropped: 306
>
> Can anyone advise what this counter indicates?  Only seems to increment
> with my ping traffic and not any customer traffic.  I have other similar
> hardware but can not reproduce the issue :-(
>
> The output
>
> 7600#show ibc
> Interface information:
>           Interface IBC0/0(idb 0x1C88ECE8)
>           5 minute rx rate 1138000 bits/sec, 156 packets/sec
>           5 minute tx rate 2305000 bits/sec, 306 packets/sec
>           1529092452 packets input, 97618397184 bytes
>           1480180863 broadcasts received
>           1522436849 packets output, 93778000882 bytes
>           15858294 broadcasts sent
>           0 Bridge Packet loopback drops
>           1415112685 Packets CEF Switched, 0 Packets Fast Switched
>           0 Packets SLB Switched, 0 Packets CWAN Switched
>           Label switched pkts dropped: 0    Pkts dropped during dma: 0
>           Invalid pkts dropped: 306    Pkts dropped(not cwan consumed): 0
>           Xconnect pkts processed: 29, dropped: 0
>           Xconnect pkt reflection drops: 0
>           Total paks copied for process level 29
>           Total short paks sent in route cache 1346148563
>           Total throttle drops 0    Input queue drops 0
>           total spd packets classified (50929199 low, 6698050 medium,
> 34521686 high)
>           total spd packets dropped (0 low, 0 medium, 0 high)
>           spd prio pkts allowed in due to selective throttling (0 med, 0
> high)
>           IBC resets   = 1; last at xxx 2010
>
> Driver Level Counters: (Cumulative, Zeroed only at Reset)
>             Frames          Bytes
>     Rx(0)   878738849       2018480538
>     Rx(1)   653772091       3242895654
>     Tx(0)   1522436850      1746755712
>
>    Input Drop Frame Count
>        Rx0 = 0                Rx1 = 0
>    Per Queue Receive Errors:
>        FRME   OFLW   BUFE   NOENP  DISCRD DISABLE BADCOUNT
>    Rx0 0      0      0      0      0        0    0
>    Rx1 0      0      0      0      0        0    0
>
>
>     Tx Errors/State:
>      One Collision Error   = 0            More Collisions       = 0
>      No Encap Error        = 0            Deferred Error        = 0
>      Loss Carrier Error    = 0            Late Collision Error  = 0
>      Excessive Collisions  = 0            Buffer Error          = 0
>      Tx Freeze Count       = 0            Tx Intrpt Serv timeout= 1
>
>     Counters collected at Idb:
>      Is input throttled    = 0            Throttle Count        = 0
>      Rx Resource Errors    = 0            Input Drops           = 306
>      Input Errors           = 0
>      Output Drops          = 0            Giants/Runts          = 0/0
>      Dma Mem Error         = 0            Input Overrun         = 0
>
> 7600#show platform hardware pfc mode
> PFC operating mode : PFC3CXL
>
> Cheers
>
> Ivan
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