Nexus6001如何找到STM_LEARNING_OVERLOAD的来源

Question

几年前我就发现NX会发送STM_LEARNING_OVERLOAD

EET: %FWM-4-STM_LEARNING_OVERLOAD: system experiencing unusual number of new address notifications - deferring learn notification for 120 seconds

在这条消息之后，cisco会淹没所有端口的通信量。

主要的问题是我找不到消息来源，因为这只是我收到的信息。没有检测到循环，所以我不能进一步调查问题。

是否有其他命令帮助调试此问题。Mac移动检测被激活：

# show running-config | include mac
mac address-table notification mac-move

谁能告诉我。当我发出详细命令时，是否有接口(在本例中为1/38)会导致问题？

# show spanning-tree active detail 

 MST0000 is executing the mstp compatible Spanning Tree protocol
 Bridge Identifier has priority 4096, sysid 0, address 002a.6a60.d101
 Configured hello time 2, fex hello time 12, max age 20, forward delay 15
 We are the root of the spanning tree
 Topology change flag not set, detected flag not set
 Number of topology changes 1039 last change occurred 0:14:24 ago
      from Ethernet1/38
 Times:  hold 1, topology change 35, notification 2
      hello 2, max age 20, forward delay 15 
 Timers: hello 0, topology change 0, notification 0

P.P.S.开关软件版本：

Software
  BIOS:      version 2.0.0
  Power Sequencer Firmware: 
             Module 1: v4.0
             Module 1: v4.0
  Fabric Power Sequencer Firmware: Module 1: version v4.0
  Microcontroller Firmware:        version v1.2.0.5
  QSFP Microcontroller Firmware:   
             Module 1: v1.3.0.0
  CXP Microcontroller Firmware:   
             Module not detected
  kickstart: version 7.2(1)N1(1)
  system:    version 7.2(1)N1(1)
  BIOS compile time:       12/19/2014
  kickstart image file is: bootflash:///n6000-uk9-kickstart.7.2.1.N1.1-new.bin
  kickstart compile time:  10/14/2015 19:00:00 [10/15/2015 09:02:08]
  system image file is:    bootflash:///system_7_2_1_N1_1_ipsada.bin
  system compile time:     10/14/2015 19:00:00 [04/10/2016 11:51:48]


Hardware
  cisco Nexus 6001 Chassis ("Nexus 64 Supervisor")

Answer 1

我发现这是下游交换机上仅存的STP配置问题。

首先，我们应该验证所有接入交换机(EdgePort、STP名称等)上的所有stp配置。

Answer 2

当您的MAC地址学习超载时，此消息将显示。( 120秒后就可以了！)如果您断开所有电缆，连接到交换机，您仍然会看到这条syslog消息。那就是一只虫子。请参阅此链接