Traffic Threshold monitoring?

Mon Aug 26 07:15:47 UTC 2002

Rob Mitzel wrote:
> So my question is...what's out there that will allow us to check
> thresholds on traffic, and notify us if needed?

RMON alarms and events for one.  These are available on pretty much all 
recent versions of IOS.  You can set a rising or falling threshhold on 
any MIB variable you like, and period of time between polls.  This will 
generate a trap to a network management station, and you can choose to 
do what with you will the alarms.

If you want to tie this stuff into scripts you can use the net-snmp trap 
  daemon to call various trap handlers that could do something keep 
track of the duration of the spike or send an alert.

Another thing that is out there in later releases is the EVENT MIB. 
This is probably overkill for what you want, and the only way to 
configure it is through SNMP.

For all of this stuff there is documentation on CCO.

For RMON alarms and events, see:

http://www.cisco.com/warp/public/477/RMON/18.shtml

For the EVENT MIB see:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121t/121t3/dtevent.htm

The net-snmp package is available at SourceForge:

http://sourceforge.net/projects/net-snmp

Eliot