Google Networking Best Practices for Large Deployments - Manual (Page 41)

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Chapter 8
Network Monitoring
Chapter 8
Summary
After your network is set up to work with Google Apps and your users are enabled, you can
maintain the quality of your users’ experience by monitoring the health of your network. To
ensure the best user experience, follow these suggestions for monitoring tools and network
traces.
Monitoring Tools
There are many commercial and open source tools to monitor various aspects of your network.
A comprehensive directory of network monitoring tools is available on the
SLAC Network
Monitoring Tools site.
Specific recommended tools are listed in the table below.
Type of Monitoring Tool Description
Device Monitoring mrtg Monitors and graphs various aspects of
network devices.
DNS changes dns-rr-monitor Monitors a specific resource record and alerts
you to changes.
Host Monitoring smokeping Monitors and plots round-trip times to many
destinations. Highly configurable.
Looking glass
server Example list 1
Example list 2
A looking glass server provides a read-only
view of a network operator’s routing
information -- including connections, latency,
and other factors -- at a remote point on
another network.
Network pingplotter Helps monitor network latency, uptime, and
route changes.