"I have finished my research and here is my findings:
The kernel panic crash is due to a software defect:
CSCug26811 Kernel Panic, process hap reset caused by excessive traffic on mgmt port,
The crash is triggered by Massive flood in MGM network.
This problem happens only when OOB management network (interface mgm0) overflooded with ftp/tftp traffic.
Current problem was observed when rate of tcp/udp sweep traffic was above 200Mb/s
Mgm interfaces can be configured with RACL which allow access from NMS only.
Besides of W/A above, there is no possible solution so far.
On the Nexus switch which is connected to FEX via mgmt port, we can disable 'cfs ipv4 distribute' and reload the switch for multicast to be disabled on the port completely. please see CSCuf38974 for that.
Currently our development team is working on to fix this defect."
Moquery is the command line cousin of Vizore, it's very helpful and efficient sometimes during the troubleshooting. This article aims to provide moquery cheat sheet to the users for some most common seen scenarios.
Here is the checklist before customers/partners contact Cisco TAC:
Firmware Version of APIC and Switch
Download Switch and APIC techsupport logs
Problem description (Symptoms with details)
Business impact (eg, what kind of services...
moquery usageAPIC moquerySwitchmoquery
This document discuss a common issue observed during the VMM integration & VM workload migration to ACI fabric.
VMware Virtual machines are hosted in Cisco UCS-B seri...