Port Security dynamic configuration on CISCO Catalyst 3560xPOE

[joshkraan]

I have connected a 10BaseT device to a CISCO Catalyst 3560xPOE switch with dynamic port security.  All seems to work fine when the distance between the two devices is closer then 200ft.  When I connect to 10BaseT devices farther out near 300ft the response from the attached device is lost. It works ok on unmanaged switches at the longer distance. Is there a minimum response time from attached devices for dynamic port security to work properly?  Is there any other explanation why it would work on cheaper switches, but not on the Port Secured Switch?

[cadet alain]

Hi,

When I connect to 10BaseT devices farther out near 300ft the response from the attached device is lost

What does it mean ?

Regards.

Alain

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[joshkraan]

Hi Cadet,

What I am saying with

When I connect to 10BaseT devices farther out near 300ft the response from the attached device is lost

is that there is no communication with the device when the cable distance is long.  No ping or HTTP since it is an embedded web server.  There is no problem with communication when the cable distance is shorter.  I would normally attribute this to signal loss in the cable, but the device can communicate fine with unmanaged switches at the same 300ft distance.

The network admin at the site says when using managed cisco switch to connect a device, the device has to respond to a ping within a certain amount of time or it will lock out the port.  Is there truth to this?  Why would the device communicate at near distance ok, but not at far distance, and why would communcation still work on an unmanaged switch at far distance?

Thanks,

Josh