Information Technology Reference
In-Depth Information
syslog message includes a time stamp, level, and facility. Syslog messages have the follow-
ing format:
mm/dd/yy:hh/mm/ss:FACILITY-LEVEL-mnemonic:description
Syslog messages can create large amounts of network bandwidth. It is important to enable
only syslog facilities and levels that are of particular importance.
Ta ble 1 5 - 8 summarizes some of the protocols just covered in this section.
Ta b l e 1 5 - 8
NetFlow, CDP, and Syslog
Te c h n o l o g y
Description
NetFlow
Collects network flow data for network planning, performance, accounting,
and billing applications
CDP
Proprietary protocol for network discovery that provides information on
neighboring devices
Syslog
Reports state information based on facility and severity levels
RMON
Remote Monitoring. Provides aggregate information of network statistics and
LAN traffic
NetFlow Performance Analysis,
www.cisco.com/en/US/tech/tk812/
NetFlow Ve r s i o n 9,
www.cisco.com/en/US/products/ps6645/
MIBs Supported by Product,
www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.
RFC 1157, A Simple Network Management Protocol (SNMP).
RFC 1441, Introduction to Version 2 of the Internet-Standard Network Management
Framework.
RFC 1757, Remote Network Monitoring Management Information Base.
RFC 1901, Introduction to Community-Based SNMPv2.
RFC 1902, Structure of Management Information for Version 2 of the Simple Network
Management Protocol (SNMPv2).
RFC 2021, Remote Network Monitoring Management Information Base Ve r s i o n 2 Us-
ing SMIv2.
RFC 2576, Coexistence Between Version 1, Version 2, and Version 3 of the Internet Stan-
dard Network Management Framework.
RFC 3164, The BSD Syslog Protocol.
