For Cisco devices, we have found that the CiscoView application is the best
tool for real-time performance monitoring. You can purchase it as a
"standalone" product. It also is bundled with the CiscoWorks 2000 Campus
suite. It has its own graphical monitoring for ports, and it also can
launch the NetView grapher.
I started CiscoView on one of our Cat5500s, and it uses the same MIB objects
that Leslie mentioned for port utilization on both ATM and 10/100 Ethernet
ports. If you use the embedded RMON agent in the switch, then you could
also use the etherStats MIB objects, which are etherStatsOctets and
etherStatsDataSource. It's not easy to use these MIBs, though. The
interfaces are not indexed the same as they are with the ifInOctets MIB.
You need to "cross-reference" the index numbers with the
etherStatsDataSource MIB object. That MIB contains the value of the ifIndex
MIB.
-----Original Message-----
From: Leslie Clark [SMTP:lclark@US.IBM.COM]
Sent: Thursday, September 16, 1999 00:08
To: NV-L@UCSBVM.UCSB.EDU
Subject: Re: Network Monitoring
There are vendor-specific applications that you can buy, of course,
but if
the agent on the device knows the answer, you can ask the questions
with
the Data Collection and Thresholding function (snmpCollect). You
need to
walk the MIBs of the device and see what it can tell you. Also see
the
file /usr/OV/conf/mibExpr.conf. In this file you can define
expressions (see
the Admin Guide for more information) that combine mib variables.
For
instance, for full-duplex interfaces, interface utilization is
(ifInOctets + ifOutOctets) * 8 * 100 / ifSpeed
Netview will do the subtraction for you to account for the time
interval.
Read up on the mib.coerce file as well.
I leave it to someone else to guide you to the mib variables for the
traffic on the switch ports. But I would start by loading all of the
MIBs
available for the devices in question and checking them out with the
MIB Browser. Those canned graphical applications are only the
beginning.
Cordially,
Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Hello all,
I've been asked if netview ( v 5 on aix 4.2 ) has a monitoring
features
such as utilization etc. I know there some grafical feature but i
couldn't find what i want.
we have several Cisco Catalyst (5500 and 1900) switches and 3 Bay
routers ( 1 asn and 2 an ).
How can i measure the utilization per a switch port and a wan router
interface ?
Greetings, Oren.
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