[techtalk] router/switch question

[Lee Blackwell]

Quick and dirty test:

On one of the machines that it supposed to be idle, run tcpdump.

If you can see traffic from the 'live' machines (ie the ones doing the
talking) then maybe you've got a hub rather than a switch.

Otherwise I'd hazard a guess it's broadcast stuff just getting bounced
around a lot.

Does the switch/hub have any configuration options?

Lee

-- 
Lee Blackwell
Unix Specialist, NCS, 3com IT.
"#include <std_disclaimer.h>"

On Tue, 5 Feb 2002, Tania M. Morell wrote:

>
> Hi,
>
> I have dsl at home.  The dsl modem has a single port to which I have an 8
> port netgear switch connected.  My dsl service includes 5 static ips so we
> have 5 cables connected to the switch (going to 4 computers and 1 linksys
> cable/dsl router).  The router is just a gateway for the fifth ip so we
> have
> about 3 computers hooked up to that now using natted ip's.
>
> I noticed yesterday that while downloading someing to one of the machines
> connected to the router, it was causing tons of activity on the other 4
> ports of the switch. It was the bottom row of lights which display
> "Green=Rx/Tx, Yellow=collisions".  It's hard to tell with those lights
> whether they're flashing green or yellow.  If I had to guess i'd say they
> were flashing green.      This seems odd to me because I know these packets
> shouldn't be getting broadcast to the other machines.  It's a switch, not a
> hub.   The only ports I expected to see activity on are the ones to the
> router and dsl modem.  My brother's machine is connected to the router as
> well and I can't recall ever seeing all this activity when he downloads
> something or is playing a game.     Does anyone have an idea whay i would
> see all the flashing and blinking on all other ports with this new machine?
>
> -T
>
>          T a n i a
> www.myquadrant.net
>
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