Anyone have recommendations for applications that graph traffic/
measure bandwidth through routers and/or servers? something like
mrtg? and/or something that measures latency? something like smoke
ping?
FWIW, I use Cacti for collecting data via SNMP every 5 minutes,
graphing that data, etc. Its good for things like watching CPU and
RAM utilization, available HD space, network traffic per interface,
counting errors on network interfaces, and other stuff. The down
side is that you need to configure an SNMP service/server on each
network node that you want to monitor. MacOS X Server has Net-SNMP
pre-installed. You just have to know how to configure it at the
command line and then turn it on in Server Admin.
I also use SmokePing for email notices of outages (every minute,
unfortunately), graphing ping response times, etc. Lastly, I added
nefu for outage notifications to my staff and to make a "human
readable" notice of outages that my users can view. I still have to
train them to check it, though. :)
If you're curious, take a peek at the URL in my sig.
