Chapter 3 ROM Monitor Commands
net
The net command executes an Ethernet transceiver loopback test on the local area network. The command syntax is:
net
The net command display looks like this:
monitor:: net
Network test – PASSED
This transceiver loopback test sends out a short test packet from the Remote Annex 6300 through the transceiver to test the integrity of the network. The test can be executed either by attaching the Remote Annex 6300 to the Ethernet or by attaching an Ethernet loopback connector to the network port.
For the 10Base2 and 10Base5 network interfaces, the preferred method for running an Ethernet transceiver loopback test is to attach the loopback connector to the network port because short test packets can interfere with normal network traffic. The accessory kit supplies Ethernet loopback connectors for these interfaces.
The 10BaseT network interface does not require a loopback connector because it provides a Link Integrity LED next to the connector. This LED verifies that the receive circuit to the wiring concentrator is operating correctly. If this LED is not lit, link LED impulses are not present on the receive line due to a disconnected cable or some other link failure.
The Ethernet transceiver loopback test causes the Net LED to turn off. If the unit passes this test, the Net LED turns on and the console displays PASSED. If the Remote Annex 6300 fails, the Net LED remains off, and the console displays an error message.
Remote Annex 6300 Hardware Installation Guide |
