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its-neteng
Beginner

Total Output Drops on Interface on a Cat-6506

Hello,

I have 2 Cat-6506's that are used for my WiSM's.  The only thing in both Chassis is 2 X WiSMs a SUP-7203A and a 6516A line card.

The only connection between the rest of the network and these chassis is on port gig 1/2.

This is the sh int gig 1/2 for that interface:

CISCO-6506#sh int gig 1/2

GigabitEthernet1/2 is up, line protocol is up (connected)

  Hardware is C6k 1000Mb 802.3, address is 000d.28cb.3bd9 (bia 000d.28cb.3bd9)

  Description: (s-12508 Bldg 15)

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 109/255, rxload 41/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full-duplex, 1000Mb/s, media type is SX

  input flow-control is off, output flow-control is off

  Clock mode is auto

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:01, output never, output hang never

  Last clearing of "show interface" counters 00:53:34

  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 7929413

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 161934000 bits/sec, 23151 packets/sec

  5 minute output rate 430715000 bits/sec, 168460 packets/sec

     59135665 packets input, 45168219877 bytes, 0 no buffer

     Received 2264364 broadcasts (1403835 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

     567906655 packets output, 178163339303 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

Notice that I cleared the Interface Counters 53Min ago and the Total Output drops is already at 7,929,413 and climbing.

This is the result from the show counters int gig 1/2

CISCO-6506#sh counters interface gigabitEthernet 1/2

64 bit counters:

0.                      rxHCTotalPkts = 173455982356

1.                      txHCTotalPkts = 444977190219

2.                    rxHCUnicastPkts = 152034993681

3.                    txHCUnicastPkts = 443597525143

4.                  rxHCMulticastPkts = 11873776884

5.                  txHCMulticastPkts = 1009753570

6.                  rxHCBroadcastPkts = 1708050100

7.                  txHCBroadcastPkts = 369911506

8.                         rxHCOctets = 158955667705181

9.                         txHCOctets = 167838361622740

10.                 rxTxHCPkts64Octets = 20028855128

11.            rxTxHCPkts65to127Octets = 68365953169

12.           rxTxHCPkts128to255Octets = 263550226871

13.           rxTxHCPkts256to511Octets = 70737965303

14.          rxTxHCpkts512to1023Octets = 47682184205

15.         rxTxHCpkts1024to1518Octets = 95857455440

16.                    txHCTrunkFrames = 444976348820

17.                    rxHCTrunkFrames = 169897598943

18.                     rxHCDropEvents = 0

32 bit counters:

0.                   rxCRCAlignErrors = 0

1.                   rxUndersizedPkts = 0

2.                    rxOversizedPkts = 0

3.                     rxFragmentPkts = 0

4.                          rxJabbers = 0

5.                       txCollisions = 0

6.                         ifInErrors = 0

7.                        ifOutErrors = 0

8.                       ifInDiscards = 10

9.                  ifInUnknownProtos = 0

10.                      ifOutDiscards = 888273867

11.            txDelayExceededDiscards = 0

12.                              txCRC = 0

13.                         linkChange = 16

14.                   wrongEncapFrames = 0

All Port Counters

1.                          InPackets = 173455967429

2.                           InOctets = 158955658166195

3.                        InUcastPkts = 152034981265

4.                        InMcastPkts = 11873776524

5.                        InBcastPkts = 1708049887

6.                         OutPackets = 444977049739

7.                          OutOctets = 167838314357672

8.                       OutUcastPkts = 443597384953

9.                       OutMcastPkts = 1009753394

10.                       OutBcastPkts = 369911392

11.                           AlignErr = 0

12.                             FCSErr = 0

13.                            XmitErr = 0

14.                             RcvErr = 0

15.                          UnderSize = 0

16.                          SingleCol = 0

17.                           MultiCol = 0

18.                            LateCol = 0

19.                       ExcessiveCol = 0

20.                       CarrierSense = 0

21.                              Runts = 0

22.                             Giants = 0

23.                         InDiscards = 10

24.                        OutDiscards = 888272926

25.                           InErrors = 0

26.                          OutErrors = 0

27.                    InUnknownProtos = 0

28.                              txCRC = 0

29.                      TrunkFramesTx = 444976208340

30.                      TrunkFramesRx = 169897584039

31.                         WrongEncap = 0

32.     Broadcast_suppression_discards = 0

33.     Multicast_suppression_discards = 0

34.       Unicast_suppression_discards = 0

35.                 rxTxHCPkts64Octets = 20028852866

36.            rxTxHCPkts65to127Octets = 68365944266

37.           rxTxHCPkts128to255Octets = 263550137767

38.           rxTxHCPkts256to511Octets = 70737943115

39.          rxTxHCpkts512to1023Octets = 47682164190

40.         rxTxHCpkts1024to1518Octets = 95857443166

41.                         DropEvents = 0

42.                     CRCAlignErrors = 0

43.                     UndersizedPkts = 0

44.                      OversizedPkts = 0

45.                       FragmentPkts = 0

46.                            Jabbers = 0

47.                         Collisions = 0

48.              DelayExceededDiscards = 0

49.                        bpduOutlost = 0

50.                        qos0Outlost = 0

51.                        qos1Outlost = 0

52.                        qos2Outlost = 0

53.                        qos3Outlost = 888272926

54.                        qos4Outlost = 0

55.                        qos5Outlost = 0

56.                        qos6Outlost = 0

57.                        qos7Outlost = 0

58.                        qos8Outlost = 0

59.                        qos9Outlost = 0

60.                       qos10Outlost = 0

61.                       qos11Outlost = 0

62.                       qos12Outlost = 0

63.                       qos13Outlost = 0

64.                       qos14Outlost = 0

65.                       qos15Outlost = 0

66.                       qos16Outlost = 0

67.                       qos17Outlost = 0

68.                       qos18Outlost = 0

69.                       qos19Outlost = 0

70.                       qos20Outlost = 0

71.                       qos21Outlost = 0

72.                       qos22Outlost = 0

73.                       qos23Outlost = 0

74.                       qos24Outlost = 0

75.                       qos25Outlost = 0

76.                       qos26Outlost = 0

77.                       qos27Outlost = 0

78.                       qos28Outlost = 0

79.                       qos29Outlost = 0

80.                       qos30Outlost = 0

81.                       qos31Outlost = 0

82.                    bpduCbicOutlost = 0

83.                    qos0CbicOutlost = 0

84.                    qos1CbicOutlost = 0

85.                    qos2CbicOutlost = 0

86.                    qos3CbicOutlost = 0

87.                         bpduInlost = 0

88.                         qos0Inlost = 0

89.                         qos1Inlost = 0

90.                         qos2Inlost = 0

91.                         qos3Inlost = 10

92.                         qos4Inlost = 0

93.                         qos5Inlost = 0

94.                         qos6Inlost = 0

95.                         qos7Inlost = 0

96.                         qos8Inlost = 0

97.                         qos9Inlost = 0

98.                        qos10Inlost = 0

99.                        qos11Inlost = 0

100.                        qos12Inlost = 0

101.                        qos13Inlost = 0

102.                        qos14Inlost = 0

103.                        qos15Inlost = 0

104.                        qos16Inlost = 0

105.                        qos17Inlost = 0

106.                        qos18Inlost = 0

107.                        qos19Inlost = 0

108.                        qos20Inlost = 0

109.                        qos21Inlost = 0

110.                        qos22Inlost = 0

111.                        qos23Inlost = 0

112.                        qos24Inlost = 0

113.                        qos25Inlost = 0

114.                        qos26Inlost = 0

115.                        qos27Inlost = 0

116.                        qos28Inlost = 0

117.                        qos29Inlost = 0

118.                        qos30Inlost = 0

119.                        qos31Inlost = 0

120.                         pqueInlost = 0

121.                           Overruns = 10

122.                           maxIndex = 0

Notice the qos3outlost counters.

So the questions is what can I do to resolve this issue?  If I have read other posts correctly all points to the ASIC being overun by that traffic being sent from my WiSMs out to the Network.

1 REPLY 1
Bernard Manduley
Beginner

Can you run and post a "show interface gig 1/2 capabilities" on the 6500 end and run the same command for the respective interface on the directly connected device? The QoS scheduling settings must be the same on both devices.

Also what is your gig1/2 on? the 6516 LC?

************** Tristan Manduley Cisco TAC