D2. Phy Loopback Test; D3. Rj45 Loopback Test; D4. 1G False Carrier Test - Broadcom 5720ZG User Manual

Broadcom NetXtreme Ethernet Adapter • Diagnostic User's Guide
Function: This is internal loopback data transmit/receive test. It initializes MAC into
internal loopback mode, and transmits 200 packets. The data should be routed back to
receive channel and receive by the receive routine, which verifies the integrity of data. One
Giga bit rate is used for this test.
Default: Enabled

3.3.24 D2. Phy Loopback Test

Command: pkttest -p
Function: This test is same as D1. Mac Loopback Test except, the data is routed back via
physical layer device. One Giga bit rate is used for this test.
Please note if the device supports E-Switch, such as 5756, the test is performed on both
laptop mode and docking mode. To perform the test only on the default port, two method
can be used: 1. command line option '-disableeswitch'; 2. 'eswitch –f' in engineering
mode before the test.
Default: Enabled

3.3.25 D3. RJ45 Loopback Test

Command: pkttest -e
Function: This is external loopback test. From the UUT point of view, no loopback mode
is configured. The data expected to be routed back by RJ45 loopback connector. 10M/s,
100M/s, and 1000M/s are used for this test.
Please note if the device supports E-Switch, such as 5756, the test is performed on both
laptop mode and docking mode. To perform the test only on the default port, two method
can be used: 1. command line option '-disableeswitch'; 2. 'eswitch –f' in engineering
mode before the test.
Default: Disabled

3.3.26 D4. 1G False Carrier Test

Command: None
Function: This test executes the same procedure as test D3 and tests to see if a false carrier
was detected at the end of the test. The –l200, –dispgbpkt, -disppkt and –errlimit command
line options were added to configure a number of operational parameters. The details of the
command line options are provided in the "COMMAND LINE OPTION PARAMETERS"
section.
Please note if the device supports E-Switch, such as 5756, the test is performed on both
laptop mode and docking mode. To perform the test only on the default port, two method
page 10
Broadcom Confidential and Proprietary