Fluke 2680A User Manual page 255

Networks are segmented by use of an active device called a Router (Gateways and
hubs sometimes have router capabilities.) When a host on one subnet wants to
send a message to a host on another subnet (the Net ID sections of the IP source
and destination are different), the Router is used to deliver the packet to the other
network subnet.
2680 Series instruments are shipped with a default IP address of 198.178.246.bcn,
where bcn is the base channel number assigned to the instrument. This is a Class C
Net ID assigned to the Fluke Corporation, so it is highly unlikely that it will
overlap with a Net ID in use at your company. However, if you want to attach a
2680 Series instrument to an existing network, you should check with your
Network Administrator before using the default IP address or assigning a new IP
address to a 2680 Series instrument or PC.
When assigning the IP address to your PC, unless your network contains a Router,
you must use the same Net ID used by the 2680 Series instruments (for example,
198.178.246.z). If you do this, you should set z to a number that does not interfere
with the instruments. Because the BCN can range from 1-99, you should set z of
the IP address of your PC in the range 101-254. The Subnet Mask assigned to the
PC should be 255.255.255.0.
If your network contains more than one subnet, and you want to communicate with
a 2680 Series instrument in another subnet, you need to set the default gateway
address in both the PC and 2680 Series to the address of the local router. The
TCI/IP stack will detect that the destination address for a packet is in a different
subnet (via the subnet mask) and send the packet to the default gateway address
where the router will route it to the proper subnet.
For example, if you have three 2680 Series instruments with bcn's 1, 2, and 3, and
a single PC, you could set the following IP addresses:
2680 Series #1
2680 Series #2
2680 Series #3
Host PC 198.178.246.101
This would place all three instruments and the PC in the same subnet (net ID
198.178.246).
198.178.246.1
198.178.246.2
198.178.246.3
Appendices
Network Considerations
H
H-7