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Article #798

Re: Monitor network utilization?

#798
From: Ken Agress
Date: Mon, 22 Jun 1998 00:00
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On Fri, 19 Jun 1998 13:05:16 GMT, tbenson@dzs.com wrote:

<snip>

>Is that due to the delay as packets are checked and routed to the appropriate
>port?  Is that server dependant, or traffic dependant?  I'm a newbie, but I
>assumed that as network traffic increases, the added delay would be
>insignificant compared to the delay caused by collisions/retransmissions on a
>shared network.

All the issues you raise are entirely dependent on the switch selected
and the network design.  A modern cut-through switch should be able to
switch 20 10Mbps ports to two 100Mbps ports at full wire rate with no
delay other than buffering delay as the packets are queued/dequeued
from the high speed port.  If the load to that port is high, there
will be minimal lost time here.
>
>(The first half of my original post, which started this thread, was to
>inquire about software that monitors network traffic.  If I knew the
>utilization level, it might help me decide whether to buy a switch or just
>another hub)

Novell produces the LANalyzer package, which is quite good, and
NetWork Associates (I believe) produces Net Xray, which is also
supposed to be quite good.  I'd lean towards renting a sniffer from
Network Associates, as I've never used anything better for traffic
analysis (we own two of their box/console combinations now, and I'm
angling for a third).

Ken Agress/CNE
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From: kenagress@earthlink.net (Ken Agress)
Subject: Re: Monitor network utilization?
Date: 1998/06/22
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