Giga lan and 10/100 lan for AutoCAD Network

Our Client is using Giga Lan for their Company Network. The have 2 different
floor (floor A and B). They are using a 10/100 switch to connect floor B to
floor A. i.e. lan at floor A is giga, while lan at floor B is 100.

Recently, they have bought some new computer with giga lan card for their
AutoCAD (AutoCAD Mech 2000i, Network version). The problem is that if they
connect the new computer at floor B (connect to the 10/100 switch), they
cannot get the AutoCAD license while their old machine (with 10/100 lan
card) have no problem.

At the beginning, they think that this is the problem of their new
computers. However, they find an interesting thing.

They moved the new computers to floor A, and connect to the lan (all giga
lan at floor A), they can get the license without any problem. i.e. NO
problem occurs when connecting the new computer (with giga lan card) to the
giga lan - can get AutoCAD License.

So, they move the new computers back to floor B, and tried to connect to the
giga lan directly at floor B. They can get the license without any problem.
i.e. Problem occurs when connecting the new computer (with giga lan card) to
the 10/100 lan - cannot get AutoCAD License.

Then, they try to change the network card of the new computers from giga to
10/100, and connect back to the 10/100 lan at floor B, No problem also. i.e.
NO problem occurs when connecting the new computer (with 10/100 lan card) to
the 10/100 lan - can get AutoCAD License.

Do anyone has idea on it? Our client find annoying because the bought the
new computer at two difference timing and two model. The computers are brand
computer and giga lan card is the only choice. This is impossible for them
to change all the lan card back to 10/100.

Many Thanks
Ken Tong

 

In general, when issues are cloudy like what you describe (difficult to find a consistent pattern to reproduce), I try a network trace utility or packet sniffer. The Network Monitor utility that comes with SMS 2003 is pretty good but there are many others, take your pick. Regardless of which tool, you can watch detailed traffic inbound/outbound on the problem clients and see where things are either dropping, blocked or simply not showing up. It may be a problem at the switch that is intermittent, but without isolating at specific points it's tough to identify the root cause.

 

Thanks, I will ask our client to try. Just want to find any experience on it
here.

--
Ken Tong

find a consistent pattern to reproduce), I try a network trace utility or
packet sniffer. The Network Monitor utility that comes with SMS 2003 is
pretty good but there are many others, take your pick. Regardless of which
tool, you can watch detailed traffic inbound/outbound on the problem clients
and see where things are either dropping, blocked or simply not showing up.
It may be a problem at the switch that is intermittent, but without
isolating at specific points it's tough to identify the root cause.