Thanks for the suggestions:

OS is XP

MAC address for machine matches what is on the switch.

Tried turning off wireless interface -- no difference

IP Address is assigned by DHCP reservation.  It already is on same VLAN as
all targets, and same VLAN as all machines that cannot ping it.  I did not
try a static IP.  I have however confirmed that if I map a drive to a
server share the server sees that the connection is from the correct
address -- but cannot ping it, nor can any remote management be done from
the server.

RPC & other services are all in the same state as an identical machine that
I *can* remotely manage & *can* ping.
Network Card settings are also in same state.

There was one additional network component on the bad machine "Oddyssey
network agent".
No change whether it is enabled/disabled.

I won't be able to do anything further until next Monday.
Maybe it will go away by itself over the weekend.







On Thu, Apr 26, 2012 at 2:01 PM, Christopher Bodnar <
[email protected]> wrote:

> Put WireShark or similar on source and destination and see what you get
> back.
>
> what happens if you statically assign this laptop and put it on the same
> VLAN as the source? Same results?
>
>
>   *Christopher Bodnar*
> Enterprise Achitect I, Corporate Office of Technology:Enterprise
> Architecture and Engineering Services  Tel 610-807-6459
> 3900 Burgess Place, Bethlehem, PA 18017
> [email protected]
>
>
> *
> The Guardian Life Insurance Company of America*
> *
> **www.guardianlife.com* <http://www.guardianlife.com/>
>
>
>
>
>
>
> From:        Bill Monicher <[email protected]>
> To:        "NT System Admin Issues" <[email protected]
> >
> Date:        04-26-12 04:15 PM
> Subject:        Unable to ping -- why?
> ------------------------------
>
>
>
> I have a single laptop in our department that I cannot ping.
> The user in question is able to access all network resources.
> Windows firewall is off, and no other firewall is running
> I have verified that all DHCP & DNS entries are correct.
> The user can ping anything on the network.
>
> Other symptoms:
> The machine loses connection to one server periodically.
> This is indicated by the fact that his computer shows the "offline" tray
> icon.
> Any time this happens, he can choose "synchronize", and he always is back
> online.
> He can access any internet/intranet site w/o problem at any time.
>
> Switch port counters show no problems.
> Changing switch port makes no difference.
>
> Any helpful suggestions appreciated.
>
> Regards,
> --BM
>
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