- Read today’s lesson notes (below)
- Review yesterday’s lesson notes
- Complete today’s lab
- Read the ICND2 cram guide
- Spend 15 minutes on the subnetting.org website
Logging messages and events both locally and to a syslog server is a core maintenance task. Syslog is a protocol that allows a host to send event notification messages across IP networks to event message collectors – also known as syslog servers or syslog daemons. In other words, a host or a device can be configured in such a way that it generates a syslog message and forwards it to a specific syslog daemon (server).
The Simple Network Management Protocol (SNMP) is a widely used management protocol and defined set of standards for communications with devices connected to an IP network. SNMP provides a means to monitor and control network devices. Like Cisco IOS IP SLA operations (which allow customers to analyse IP service levels using active traffic monitoring for measuring network performance), SNMP can be used to collect statistics, monitor device performance, and provide a baseline of the network, and is one of the most commonly used network maintenance and monitoring tools.
While SNMP can provide traffic statistics, SNMP cannot differentiate between individual flows. However, Cisco IOS NetFlow can. A flow is simply a series of packets with the same source and destination IP address, source and destination ports, protocol interface, and Class of Service parameters.
Today you will learn about the following:
- Syslog
- SNMP
- Netflow
This lesson maps to the following CCNA syllabus requirements:
ü Configure and verify syslog
- Utilise syslog outputs
ü Describe SNMP v2 and v3
ü Utilise netflow data