Mac-Address And Arp-Cache - Laserworld Net OEM User Manual

An answer should be displayed now.
If a timeout message is displayed, the correct settings of the IP-address of both, Net OEM (DIP-
switch) and the host PC must be checked again. Check the cable connection also.
Some PCs or Notebooks have problems with direct peer-to-peer network connections.
If no connection is possible, try to connect a network switch between host PC and Net OEM.
It can take some seconds until connected devices are recognized by the host.
Wait some seconds after connecting the network cable (or switching on Net OEM), before checking
the connection.
2.4

MAC-address and ARP-Cache

The MAC-address is a device number for each network device. It is a worldwide unique number.
Each network device has a different number. This number cannot be changed.
The host PC stores a list of corresponding MAC-numbers and IP-addresses after a device is
connected. This list is the so called 'ARP-cache'. This list can remain in the cache until the next
booting sequence of the PC or even longer.
When setting Net OEM to a new IP-address, there may be stored the old address in the cache so that
the PC cannot find the device under the new address.
It can take some time (up to a few minutes) until the PC refreshes the cache.
So if no connection is possible after changing an IP-address of Net OEM, there are 2 possibilities to
solve the problem.
1. disconnect and reconnect the network cable.
2. delete the old ARP-cache at command line level by use of the following command:
arp -d 192.169.0(or1). and the device address 100 to 115 <Return>
There is no answer to the command, except if no entry was found in the cache.
The card should be found now from the host again.
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