我注意到 Cisco ASA 5585 (SSP-20) 接口错误计数器特别上升，overrun但到目前为止我们还没有看到任何生产影响或问题，错误率很低，所以它不明显，但想追踪它可能是什么问题。
asa/pri/act# show int detail | b Internal-Data0/1
Interface Internal-Data0/1 "", is up, line protocol is up
Hardware is i82599_xaui rev01, BW 10000 Mbps, DLY 10 usec
(Full-duplex), (10000 Mbps)
Input flow control is on, output flow control is off
MAC address 0000.0001.0002, MTU not set
IP address unassigned
1647603170965 packets input, 997527140937135 bytes, 0 no buffer
Received 864639959 broadcasts, 0 runts, 0 giants
16931212 input errors, 0 CRC, 0 frame, 16931212 overrun, 0 ignored, 0 abort
0 pause input, 0 resume input
0 L2 decode drops, 0 demux drops
1384367635589 packets output, 843565440564127 bytes, 111 underruns
0 pause output, 0 resume output
0 output errors, 0 collisions, 1 interface resets
0 late collisions, 0 deferred
0 output decode drops
0 input reset drops, 0 output reset drops
Queue Stats:
RX[00]: 422029984108 packets, 255396173038299 bytes, 15836342 overrun
Blocks free curr/low: 511/112
RX[01]: 407016123288 packets, 245899431598039 bytes, 269316 overrun
Blocks free curr/low: 511/168
RX[02]: 413500421902 packets, 253352037908193 bytes, 566063 overrun
Blocks free curr/low: 511/264
RX[03]: 405056641781 packets, 242879498449889 bytes, 259491 overrun
Blocks free curr/low: 511/189
TX[00]: 330190721654 packets, 199847247773742 bytes, 0 underruns
Blocks free curr/low: 508/121
TX[01]: 338943972803 packets, 207641035134472 bytes, 0 underruns
Blocks free curr/low: 511/116
TX[02]: 351032018606 packets, 213654237791772 bytes, 0 underruns
Blocks free curr/low: 510/250
TX[03]: 334102657656 packets, 196810495181007 bytes, 0 underruns
Blocks free curr/low: 510/90
TX[04]: 0 packets, 0 bytes, 0 underruns
Blocks free curr/low: 511/511
Used by GigabitEthernet0/5
TX[05]: 4 packets, 528 bytes, 0 underruns
Blocks free curr/low: 511/509
Used by TenGigabitEthernet0/9
TX[06]: 4 packets, 528 bytes, 0 underruns
Blocks free curr/low: 511/510
Used by TenGigabitEthernet0/8
TX[07]: 30112705950 packets, 25621895258706 bytes, 111 underruns
Blocks free curr/low: 511/0
Used by GigabitEthernet0/6
TX[08]: 21 packets, 1180 bytes, 0 underruns
Blocks free curr/low: 511/510
Used by GigabitEthernet0/7
Topology Information:
This interface, a SSP Embedded NIC Port, is connected
with Internal-Data0/3, a SSP Switch Uplink Port.
Control Point Interface States:
Interface number is 3
Interface config status is active
Interface state is active
我做了基本的故障排除cpu-hog等，但没有看到任何大量的猪等。
目前最大连接数约为 40k，400mbps流量速率为 75kpps。
接口错误率图
