#Ethernet loopback testing drivers#
#Ethernet loopback testing driver#
#Ethernet loopback testing Offline#

If a test is not present in this directory, then it may only be available as a 32-bit test. Selects internal (or external) loopback mode.Įnables or disables printing of warning messages.Ħ4-bit tests are located in the sparcv9 subdirectory: /opt/SUNWvts/bin/sparcv9/ testname. Specifies the device to test such as ge0 or eri0. opt/SUNWvts/bin/netlbtest standard_arguments -o dev= device ,tpkts= n ,pksz= pkt_size ,lb= Internal ,warn= Disable Table 40-3 netlbtest Command-Line Since netlbtest requires a loopback connector, it can only be selected when Intervention mode is enabled. It is assumed that the host is not connected to the network through the intended test device(s). Netlbtest Test Modes Table 40-2 netlbtest Test Modes This option is only available on multiprocessor systems. If no processor is specified, the test migrates between processors. The default setting is Disable.īinds the test to a specific processor. The default setting is internal loopback mode.Įnables or disables the printing of warning messages. The default packet size is 1000 bytes.ĭetermines the external and internal loopback mode. The default number of packet is 1000.ĭetermines the size (in bytes) of the packets to be transmitted.Ħ0 <= packet size <= 1514. Specifies the total number of the packets to send. Specifies the Port Address, Host ID, and Domain Name of the system under test. Refer to Table 40-1 for test parameter descriptions. Figure 40-1 netlbtest Test Parameter Options Dialog Box Refer to the SunVTS User's Guide for more details. If you do not see this test in the System Map, you might need to expand the collapsed groups, or your system may not include the device appropriate to this test. To reach the dialog box below, right-click on the test name in the System Map and select Test Parameter Options. Type the following two commands at the command prompt:

#Ethernet loopback testing Offline#

Netlbtest also requires that the eri device be configured offline before running the test. See 'Twisted-Pair Ethernet (TPE) Loopback Cable' for the diagram. The loopback connector for the eri device is a standard RJ45 connector. The two ends of the cable should be connected to the TX and RX ports of the adapter (the order does not matter), thus forming a loop.

The cable can be made by splitting a standard fiber optic cable in two. The loopback cable for ge is based on the following specifications: multimode, duplex, 62.5/125 micron, sc connector, 850nm. The loopback connector is required for both internal and external tests of the Ethernet device.

#Ethernet loopback testing driver#

A loopback connector provides the network interface driver the necessary link for testing, while maintaining isolation from a live network. netlbtest cannot run if the network interface is connected to a live network, however the link must be up. To run netlbtest, a loopback connector must be connected to the Ethernet interface. Even though the netlbtest does not depend on the network interface configuration status of the Ethernet interface, the interface should be brought down with the ifconfig command (refer to the ifconfig(1M) man page) to avoid erroneous messages. You must have the Ethernet card and the device driver installed, a loopback connector in place, and Intervention mode enabled before running netlbtest. Each time the packet sent is selected from a different starting point of the data buffer, so that any two consecutively transmitted packets will not be the same.ĭo not run nettest and netlbtest at the same time or the tests may fail. If an error occurs (for example, packet mismatch or timeout), an error message indicating the type of error, its probable cause(s) and recommended action(s) is displayed on the SunVTS console.The data sent out is generated by a random number generator, and put into a data buffer. The test generates and sends out the desired number of packets (a tunable parameter) and expects to receive the same number of packets through the loopback interface, external or internal. For the purpose of this test, a packet is defined as an Ethernet header followed by the Ethernet data payload (refer to the IEEE 802.3z standard). The netlbtest uses DLPI RAW mode to talk to the device driver. It runs in loopback (external/internal) mode. These include eri (the Ethernet device in the RIO chip) and ge (Gigabit Ethernet), and ce (GigaSwift Ethernet).

#Ethernet loopback testing drivers#

It provides functional test coverage of the devices whose device drivers support the Ethernet loopback test. The netlbtest replaces the gemtest previously included in SunVTS. Chapter 40 Ethernet Loopback Test ( netlbtest)