Obtaining A File Of Core Memory Information - Cisco Nexus 1000V Troubleshooting Manual

Obtaining a File of Core Memory Information

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Answer the following questions before calling for technical support:
Step 3
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Step 4 Is your problem related to a software upgrade attempt?
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Obtaining a File of Core Memory Information
Cisco customer support engineers often use files from your system for analysis. One such file contains
memory information and is referred to as a core dump. The file is sent to a TFTP server or to a flash card
in slot0: of the local switch. You should set up your switch to generate this file under the instruction of
your customer support representative and send it to a TFTP server so that it can be emailed to them.
To generate a file of core memory information, or a core dump, use the command in the following
example.
Note The filename (indicated by jsmith_cores) must exist in the TFTP server directory.
Cisco Nexus 1000V Troubleshooting Guide, Release 5.2(1)SV3(1.1)
23-2
show logging log CLI (displays the error messages)
show logging last number (displays the last lines of the log)
On which switch or port is the problem occurring?
Which Cisco Nexus 1000V software, driver versions, operating systems versions and storage device
firmware are in your fabric?
ESX and vCenter Server software that you are running?
What is the network topology?
Were any changes being made to the environment (VLANs, adding modules, upgrades) prior to or
at the time of this event?
Are there other similarly configured devices that could have this problem, but do not?
Where was this problematic device connected (which switch and interface)?
When did this problem first occur?
When did this problem last occur?
How often does this problem occur?
How many devices have this problem?
Were any traces or debug output captured during the problem time? What troubleshooting steps have
you attempted? Which, if any, of the following tools were used?
Ethanalyzer, local, or remote SPAN
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CLI debug commands
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traceroute, ping
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What was the original Cisco Nexus 1000V version?
What is the new Cisco Nexus 1000V version?
switch# system cores tftp://10.91.51.200/jsmith_cores
switch# show system cores
Cores are transferred to tftp://10.91.51.200/jsmith_cores
Chapter 23 Before Contacting Technical Support
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