Document Change Notice
300020-C Rev. 00
65
The following paragraphs describe the purpose of each field in a Syslog packet
shown in
Figure 9
.
IP Header -- Syslog adds to any event message that matches all filtering criteria
the destination IP address for a specific remote host.
UDP Header -- Syslog adds to any event message that matches all filtering
criteria the destination UDP port number on the remote host identified in the IP
header.
UDP Data -- The UDP data field in the Syslog packet contains a reformatted
router event message, plus a priority code required by the remote host. The remote
host uses this information to decide how to handle messages received from a
router.
Priority Code -- A priority code and its text (see
Figure 10
) consist of a facility
code plus an error-level code in the form facility.error.
Figure 9.
Syslog Message Encapsulation
"{<priority code>} {Syslog message}"
"<[Facility] | [Level]>"
"[Entity]: [Description] SLOT:[Slot Number] SEVERITY:[Severity Level]
ENTITY_CODE/EVENT_CODE: [Entity_code/Event_code]"
[IP header] [UDP header]
UDP data
TS0003B
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