[c-nsp] Cisco WS-CBS3130G-S-F and OutDiscards
Kevin Graham
kgraham at industrial-marshmallow.com
Sat Feb 12 15:34:04 EST 2011
Microbursts, see the archives (though it would be so much nicer if these platforms reported them properly as output buffer failures).
Nice counter bug there on broadcast packets, it made it hard to concentrate on the real problem.
[sent from my mobile]
On Feb 12, 2011, at 11:58 AM, Jose Hadamik <jhadamik at gmail.com> wrote:
> Hello, I was hoping someone would be able to shed some light on the
> OutDiscards that I am getting. I have a Port-Channel with 2 members,
> each are 1G interfaces. Traffic load is typically around 70-150Mbps on
> the port-channel viewing 5 minute input and output; however, I have
> seen traffic burst to 500Mbps using PRTG at 3 second intervals. The
> type of traffic on the port-channel is primarily iSCSI; what is a
> little interesting is that the OutDiscards erros are logged at the
> same time, with the same size. Not all interfaces are in the same
> vlan, the port-channel is always double the size of the OutDiscards of
> the interfaces. Cisco's site does not offer any additional information
> of what I already know;
> http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008015bfd6.shtml
>
>
>
> A1#show int counters err
>
> Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize
> OutDiscards
> Gi1/0/1 0 0 0 0 0
> 2084
> Gi1/0/2 0 0 0 0 0
> 2084
> Gi1/0/3 0 0 0 0 0
> 2084
> Gi1/0/4 0 0 0 0 0
> 2084
> Gi1/0/5 0 0 0 0 0
> 2084
> Gi1/0/6 0 0 0 0 0
> 2084
> Gi1/0/7 0 0 0 0 0
> 2084
> Gi1/0/8 0 0 0 0 0
> 2084
> Gi1/0/9 0 0 0 0 0
> 2084
> Gi1/0/10 0 0 0 0 0
> 2084
> Gi1/0/11 0 0 0 0 0
> 2084
> Gi1/0/12 0 0 0 0 0
> 2084
> Gi1/0/13 0 0 0 0 0
> 2084
> Gi1/0/14 0 0 0 0 0
> 2084
> Gi1/0/15 0 0 0 0 0
> 2084
> Gi1/0/16 0 0 0 0 0
> 2084
> Gi1/0/17 0 0 0 0 0
> 2084
> Gi1/0/18 0 0 0 0 0
> 2084
> Gi1/0/19 0 0 0 0 0
> 2084
> Gi1/0/20 0 0 0 0 0
> 2084
> Gi1/0/21 0 0 0 0 0
> 0
> Gi1/0/22 0 0 0 0 0
> 0
> Gi1/0/23 0 0 0 0 0
> 0
> Gi1/0/24 0 0 0 0 0
> 0
> Po1 0 0 0 0 0
> 4168
>
> Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen
> Runts Giants
> Gi1/0/1 0 0 0 0 0
> 0 0
> Gi1/0/2 0 0 0 0 0
> 0 0
> Gi1/0/3 0 0 0 0 0
> 0 0
> Gi1/0/4 0 0 0 0 0
> 0 0
> Gi1/0/5 0 0 0 0 0
> 0 0
> Gi1/0/6 0 0 0 0 0
> 0 0
> Gi1/0/7 0 0 0 0 0
> 0 0
> Gi1/0/8 0 0 0 0 0
> 0 0
> Gi1/0/9 0 0 0 0 0
> 0 0
> Gi1/0/10 0 0 0 0 0
> 0 0
> Gi1/0/11 0 0 0 0 0
> 0 0
> Gi1/0/12 0 0 0 0 0
> 0 0
> Gi1/0/13 0 0 0 0 0
> 0 0
> Gi1/0/14 0 0 0 0 0
> 0 0
> Gi1/0/15 0 0 0 0 0
> 0 0
> Gi1/0/16 0 0 0 0 0
> 0 0
> Gi1/0/17 0 0 0 0 0
> 0 0
>
> Port Single-Col Multi-Col Late-Col Excess-Col Carri-Sen
> Runts Giants
> Gi1/0/18 0 0 0 0 0
> 0 0
> Gi1/0/19 0 0 0 0 0
> 0 0
> Gi1/0/20 0 0 0 0 0
> 0 0
> Gi1/0/21 0 0 0 0 0
> 0 0
> Gi1/0/22 0 0 0 0 0
> 0 0
> Gi1/0/23 0 0 0 0 0
> 0 0
> Gi1/0/24 0 0 0 0 0
> 0 0
> Po1 0 0 0 0 0
> 0 0
> A1#
> A1#show int po1
> Port-channel1 is up, line protocol is up (connected)
> Hardware is EtherChannel, address is 0021.d724.1d12 (bia 0021.d724.1d12)
> MTU 1500 bytes, BW 2000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 7/255, rxload 9/255
> Encapsulation ARPA, loopback not set
> Keepalive set (10 sec)
> Full-duplex, 1000Mb/s, link type is auto, media type is unknown
> input flow-control is off, output flow-control is unsupported
> Members in this channel: Gi1/0/17 Gi1/0/18
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input 00:00:00, output 00:03:46, output hang never
> Last clearing of "show interface" counters 00:48:49
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4168
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 71160000 bits/sec, 12776 packets/sec
> 5 minute output rate 60486000 bits/sec, 7440 packets/sec
> 40736064 packets input, 33573471468 bytes, 0 no buffer
> Received 18446744073527603055 broadcasts (45048 multicasts)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 watchdog, 45048 multicast, 0 pause input
> 0 input packets with dribble condition detected
> 22105475 packets output, 21076221705 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
> A1#show int gi1/0/1
> GigabitEthernet1/0/1 is up, line protocol is up (connected)
> Hardware is Gigabit Ethernet, address is 0021.d724.1d01 (bia 0021.d724.1d01)
> MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
> reliability 255/255, txload 1/255, rxload 1/255
> Encapsulation ARPA, loopback not set
> Keepalive set (10 sec)
> Full-duplex, 1000Mb/s, media type is 1000BaseX
> input flow-control is off, output flow-control is unsupported
> ARP type: ARPA, ARP Timeout 04:00:00
> Last input never, output 00:00:01, output hang never
> Last clearing of "show interface" counters 00:48:54
> Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2084
> Queueing strategy: fifo
> Output queue: 0/40 (size/max)
> 5 minute input rate 1686000 bits/sec, 204 packets/sec
> 5 minute output rate 2338000 bits/sec, 383 packets/sec
> 1023612 packets input, 898799170 bytes, 0 no buffer
> Received 14 broadcasts (0 multicasts)
> 0 runts, 0 giants, 0 throttles
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> 0 watchdog, 0 multicast, 0 pause input
> 0 input packets with dribble condition detected
> 1997101 packets output, 1758204034 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
>
> Any documents or references so that I can pick my brain at them for
> additional assitance.
>
> Thanks,
>
> Jose
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