Hi all
I want to do some 'sniffing' on my network due to users reporting
speed issues on the LAN, I have PRTG installed but I am not seeing
anything unusual in the graphs to indicate high utilisation on the LAN
I have downloaded and installed Ethereal. On my system of course in a
switched network, I am seeing traffic over the wire, but it is only
traffic originating or destined for my IP and of course broadcast
traffic
I remember there was a way on a Cisco switch to set a port that
basically acts as a conduit for all traffic that passes over the
fabric
I want to set a system up to capture all data packets over the network
for analysis, if someone could tell me the best way to do this it
would be appreciated

Scott

Hi Scott,

You are looking for "Port Monitor mode". Its called different things
on different platforms but essentually that's what it is. Look under
your device specific documenation.

Cheers.....................pk.


--
Peter from Auckland.

Scooty wrote:
The following is an example of Switch Port Analyzer (SPAN) on a Cisco 2950T:

e.g.:

monitor session 1 source interface Fa0/1
monitor session 1 destination interface Fa0/16 encapsulation dot1q


In this case I chose an inter-VLAN routing trunk port (Fa0/1) as the
SPAN source, and the Fa0/16 port as the SPAN destination. I used
"encapsulation dot1q" to preserve the 802.1Q headers, but that's optional.

As the other responder stated, you should consult the documentation for
your specific platform.

Best Regards,
News Reader