Why Can't I Find My GPIB-ENET/100?
Several situations might prevent the Add GPIB-ENET/100 Wizard from discovering your GPIB-ENET/100 hardware.
The GPIB-ENET/100 is Not Properly Connected
Make sure the GPIB-ENET/100 is plugged in, connected to the network, and switched on. Both the PWR/RDY and LINK 10/100 lights on the front of the GPIB-ENET/100 must be lit before the device can be discovered. The PWR/RDY light on the front of the unit indicates whether it is powered on, and a green or amber LINK 10/100 light indicates that the network is properly connected.
The LINK 10/100 light will not turn on if the Ethernet cable you are using is damaged, or if the wrong Ethernet cable type (that is, standard instead of crossover) is being used.
The GPIB-ENET/100 is Outside the Subnet Boundary
NI-488.2 uses broadcast packets to discover GPIB-ENET/100 units, but most routers do not propagate these packets across subnet boundaries. If the GPIB-ENET/100 is not connected to the computer's subnet, NI-488.2 cannot discover it.
To ensure the computer running NI-488.2 and the GPIB-ENET/100 are on the same subnet, connect both of them to the same Ethernet hub. Your network administrator can also help you identify your subnet boundary and connect the GPIB-ENET/100 inside it.
Although only a computer on the same subnet can discover the GPIB-ENET/100 or change its network settings, any computer can use it as a GPIB interface. To add a GPIB-ENET/100 that is outside the computer's local subnet, specify the hostname or IP address in the Add GPIB-ENET/100 Wizard.
A Firewall is Blocking Communication
Firewalls can block traffic that needs to pass between NI-488.2 and a GPIB-ENET/100. Refer to the firewall documentation for instructions on opening ports. The following ports should be open:
- TCP 5000, 5003, 5005, 5010, 5015, and 44516
- UDP 1024 through 5000 and 44515