Re: Network monitoring tools

From: Ray Stell <stellr_at_cns.vt.edu>
Date: Wed, 3 Aug 2005 13:05:55 -0400
Message-ID: <20050803170555.GA26935@locust.cns.vt.edu>

I assume you do not have network admin support or you wouldn't be here. You really need to have your network admin on board with you, period. They have the snmp community stings and network element passwds. You will need them.

You can look at your interfaces for free:

$ netstat -i
Kernel Interface table

Iface       MTU Met    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
eth0       1500   0  2904082      0      0      0   824105      0      0      0 BMRU
lo        16436   0     1194      0      0      0     1194      0      0      0

but you need to locate where in the lan the bottleneck is. For that you can do similar commands along the way in network elements, for free, to find where the drops/errors are. Scripted snmp queries will catch problems faster then cli logins, however. I use scotty, a tcl extention to rip these adhoc jobs out. Perl/java have many similar freebees.

For money, and at the enterprise level, there are tons of great tools. We are particually taken with SMARTS/InCharge: www.smarts.com (emc bought them recently). The winning feature here it that it does root cause analysis of problems...very cool!

On Wed, Aug 03, 2005 at 11:01:52AM -0400, Ron Rogers wrote:
> List,
> We experience network slow downs from time to time that have the database users complaining.
> Our network is a NOVELL network connecting to a Linux server/ Oracle 10g.
> What type of equipment/software do you use to help detect what might be causing the network slow down?
> We have proven that it is network related because the non database users also complain at the same time.
>
> Thanks,
> Ron
>
> --
> http://www.freelists.org/webpage/oracle-l

Ray Stell stellr_at_vt.edu (540) 231-4109 Tempus fugit 28^D My Bunji Jumping Instructor - Hugo First

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Received on Wed Aug 03 2005 - 12:07:58 CDT