S6850+丢包

现场反馈交换机display packet-drop看有错包，且错包在不断增长。业务正常，接口下看没有错包，带宽占用也不到1%。现场想要确认设备是否有什么异常。

<6300>display packet-drop interface ten 1/0/42

Ten-GigabitEthernet1/0/42:

  Packets dropped due to full GBP or insufficient bandwidth: 4850303980

  Packets dropped due to Fast Filter Processor (FFP): 0

  Packets dropped due to STP non-forwarding state: 0

  Packets dropped due to insufficient data buffer. Input dropped: 0  Output dropped: 4850303980

<6300>display packet-drop interface ten 1/0/42

Ten-GigabitEthernet1/0/42:

  Packets dropped due to full GBP or insufficient bandwidth: 4850304038

  Packets dropped due to Fast Filter Processor (FFP): 0

  Packets dropped due to STP non-forwarding state: 0

  Packets dropped due to insufficient data buffer. Input dropped: 0  Output dropped: 4850304038

6300>display int ten 1/0/42[22D[Jdisplay packet-drop interface ten 1/0/42

Ten-GigabitEthernet1/0/42:

  Packets dropped due to full GBP or insufficient bandwidth: 4850305617

  Packets dropped due to Fast Filter Processor (FFP): 0

  Packets dropped due to STP non-forwarding state: 0

  Packets dropped due to insufficient data buffer. Input dropped: 0  Output dropped: 4850305617

 结合底层show/c看，多接口存在拥塞丢包记录，麻烦还是怀疑现场流量存在突发，导致拥塞： 

Probe

Bcm slot 1 chip 0 show/c

slot 1 chip 0
存在丢包:
RDBGC2.cpu0       :            44,181,983         +22,432,189               1/s
RIPHE6.xe0        :                    47                 +16
RDBGC1.xe0        :                    47                 +16
TDBGC2.xe0        :                    18                 +11
TDBGC4.xe0        :                    34                 +16
TDBGC6.xe0        :                    34                 +16
RPRM.xe0          :        62,612,213,580     +39,957,668,772           1,293/s
UCQ_DROP_PKT(69).xe0:               210,606            +198,871
RIPHE6.xe1        :                    66                 +16
RDBGC1.xe1        :                    66                 +16
TDBGC2.xe1        :                    13                  +2
TDBGC4.xe1        :                    24                  +9
TDBGC6.xe1        :                    24                  +9
RPRM.xe1          :        61,381,779,485     +39,336,359,875           3,566/s
UCQ_DROP_PKT(5).xe1:                67,675             +55,747
RIPHE6.xe2        :                   102                 +16
RDBGC1.xe2        :                   102                 +16
RDBGC2.xe2        :             1,164,271            +751,081
TDBGC2.xe2        :                    47                  +1
TDBGC4.xe2        :                    65                  +6
TDBGC6.xe2        :                    65                  +6
RPRM.xe2          :        60,788,932,050     +39,181,669,608           1,187/s
UCQ_DROP_PKT(5).xe2:                86,902             +71,207
RIPHE6.xe3        :                    30                 +12
RDBGC1.xe3        :                    30                 +12
TDBGC2.xe3        :                     7                  +3
TDBGC4.xe3        :                     8                  +3
TDBGC6.xe3        :                     8                  +3
RPRM.xe3          :         2,422,262,852        +595,918,653
UCQ_DROP_PKT(5).xe3:                 4,248              +3,539
RIPHE6.xe4        :                    36                 +13
RDBGC1.xe4        :                    36                 +13
TDBGC2.xe4        :                     3                  +1
TDBGC4.xe4        :                     7                  +4
TDBGC6.xe4        :                     7                  +4
RPRM.xe4          :         1,147,478,519        +588,183,839
UCQ_DROP_PKT(69).xe4:                 7,927              +2,548
RIPHE6.xe5        :                    25                 +12
RDBGC1.xe5        :                    25                 +12
TDBGC2.xe5        :                    11                  +4
TDBGC4.xe5        :                    11                  +4
TDBGC6.xe5        :                    11                  +4
RPRM.xe5          :         2,131,728,270        +804,118,832
RIPHE6.xe6        :                    60                 +12
RDBGC1.xe6        :                    60                 +12
TDBGC4.xe6        :                    16                  +6
TDBGC6.xe6        :                    16                  +6
RPRM.xe6          :         2,289,289,242        +896,743,521
RIPHE6.xe7        :                    16                 +16
RDBGC1.xe7        :                    16                 +16
RPRM.xe7          :         1,597,790,002      +1,597,790,002           2,271/s
UCQ_DROP_PKT(5).xe7:                82,001             +82,001
RIPHE6.xe8        :                    16                 +16
RDBGC1.xe8        :                    16                 +16
RPRM.xe8          :           917,453,865        +917,453,865           1,083/s
MCQ_DROP_PKT(0).xe41:         4,850,268,840      +4,277,629,661            //对应T1/0/42接口
RIPHE4.xe42       :                     9                  +9
RIPHE6.xe42       :                 1,708                +902
RPORTD.xe42       :                     3                  +3
RDBGC1.xe42       :                 1,717                +911
RDBGC7.xe42       :                     3                  +3
RDBGC8.xe42       :            66,615,324         +35,935,987
TDBGC4.xe42       :                     5                  +1
TDBGC6.xe42       :                     5                  +1
RPRM.xe42         :            86,736,751         +73,975,918              10/s
RIPHE4.xe43       :                     8                  +6
RIPHE6.xe43       :                   618                +317

RDBGC1.xe43       :                   626                +323 

debug port mapping slot 1查看接口和底层接口的对应关系

多接口存在拥塞丢包记录，麻烦还是怀疑现场流量存在突发，导致拥塞，建议现场排查业务流量；处理建议：  

1、 可以将接口flow-interval修改为5s，观察对应接口流量情况；

2、 在display packet-drop interface对应计数增长前后，分别收集下show/c信息，以便内部对比前后是否有拥塞计数增加；