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List: cisco-nsp
Subject: Re: [c-nsp] Troubleshooting Input Queue Drops on 7600
From: Rodney Dunn <rodunn () cisco ! com>
Date: 2010-06-30 18:00:43
Message-ID: 4C2B864B.3060803 () cisco ! com
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You could try the 'debug ip cef packet' on the RP, as it captures only
sw switched traffic, and it has rate limiting ability built in it.
Rodney
On 6/30/10 11:30 AM, Devon True wrote:
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> All:
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> I am seeing increasing input queue drops on a 7600 running 12.2(33)SRC5
> on a SPA-2X1GE in a 7600-SIP-400.
>
> #sh int g1/1/1
> GigabitEthernet1/1/1 is up, line protocol is up
> Hardware is GigEther SPA, address is 001d.7170.3500 (bia 001d.7170.3500)
> Description:
> Internet address is x.x.x.x/yy
> MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 72/255, rxload 46/255
> Encapsulation ARPA, loopback not set
> Keepalive not supported
> Full Duplex, 1000Mbps, link type is force-up, media type is SX
> output flow-control is unsupported, input flow-control is unsupported
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:00, output 00:00:00, output hang never
> Last clearing of "show interface" counters 01:44:10
> Input queue: 0/75/1707/0 (size/max/drops/flushes); Total output drops: 0
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 183245000 bits/sec, 41346 packets/sec
> 5 minute output rate 283924000 bits/sec, 55078 packets/sec
> 256319513 packets input, 149816057859 bytes, 0 no buffer
> Received 5 broadcasts (0 IP multicasts)
> 0 runts, 1707 giants, 0 throttles
> 1707 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 watchdog, 0 multicast, 0 pause input
> 308870586 packets output, 193458081331 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 pause output
> 0 output buffer failures, 0 output buffers swapped out
>
> I also ran "sh int g1/1/1 switching" and it looks like the RP is
> dropping the packets.
>
> #sh int g1/1/1 switching
> GigabitEthernet1/1/1
> Throttle count 0
> Drops RP 1706 SP 0
> SPD Flushes Fast 0 SSE 0
> SPD Aggress Fast 0
> SPD Priority Inputs 7257 Drops 0
>
> Protocol Path Pkts In Chars In Pkts Out Chars Out
> Other Process 0 0 0 0
> Cache misses 0
> Fast 0 0 0 0
> Auton/SSE 15978 958680 0 0
> IP Process 80379934 7498092736 42273104 3084247027
> Cache misses 0
> Fast 68341283 5017154676 1197481 86714780
> Auton/SSE 401843915443 245108148367129 516300637842
> 386876899705145
> DEC MOP Process 0 0 31700 2440900
> Cache misses 0
> Fast 0 0 0 0
> Auton/SSE 0 0 0 0
> ARP Process 15978 958680 15866 951960
> Cache misses 0
> Fast 0 0 0 0
> Auton/SSE 0 0 0 0
>
> Any advice on troubleshooting? I looked at
> http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a0080094791.shtml
> and "show buffers input-interface g1/1/1 header" does not display any
> data and performing "debug ip packet" on a production router may not be
> in my best interests. :)
>
> - --
> Devon
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