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Cisco NX-OS System Messages Reference
OL-15994-03
Chapter 1 Introduction to System Messages
System Log Message Format
FACILITY is a code consisting of two or more uppercase letters that indicate the facility to which the
system message refers. A facility is a hardware device, a protocol, a feature, or a module of the system
software.
System message SEVERITY codes range from 0 to 3 and reflect the severity of the condition. The lower
the number, the more serious the situation.
Table 1-5 lists the severity levels.
MNEMONIC is a code that uniquely identifies the system message.
Message-text is a text string that describes the condition. This portion of the message might contain
detailed information about the event, including terminal port numbers, network addresses, or addresses
that correspond to locations in the system memory address space. Because the information in these
variable fields changes from message to message, it is represented here by short strings enclosed in
square brackets (
[ ]). A decimal number, for example, is represented as [dec].
Table 1-6 lists the representations of variable fields and the type of information in the fields.
The following example system message shows how the variable field might be used:
IP-addr-switch IP address of the switch
FACILITY Facility of the error or event (daemon, kernel, VSHD, or other facility)
severity Single-digit code from 0 to 3 that indicates the severity of the message
MNEMONIC Text string that uniquely describes the system message
%$VDC #%$ Optional virtual device context (VDC) ID that appears in the description for
messages requiring VDC IDs
%$VRF #%$ Optional virtual routing and forwarding (VRF) ID that appears in the
description for messages requiring VRF IDs
description Text string that contains detailed information about the reported event
Table 1-4 syslog Element Descriptions for a Remote-Logging Server (continued)
Element Description
Ta b l e 1-5 System Log Message Severity Level Descriptions
Level Description
0 – emergency System unusable
1 – alert Immediate action needed
2 – critical Critical condition
3 – notification Normal but significant condition
Ta b l e 1-6 Representation of Variable Fields in System Messages
Representation Type of Information
[dec] Decimal number
[hex] Hexadecimal number
[char] Single character
[chars] Character string
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