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User Guide
26
sub-optimal circumstances. For e example use it to operate at 10 or 100 Mb/s in a link
supporting 1000 Mb/s. The general procedure to configure the auto-negotiation in your
test unit is as follows:
1. From the Home panel, go to CONFIG,
The port setup panel is displayed.
2. Select either Port A or Port B to enter in the port specific configuration.
3. Go to Physical layer to enter in the physical settings configuration panel.
4. Go to Autonegotiation.
5. Set Enable to Yes to configure the link speed using auto-negotiation or to No to
disable auto-negotiation and force the link speed to a fixed value.
6. If you have enabled auto-negotiation in the previous step configure the allowed bit
rates through the 1000-FD, 100-FD and 10-FD menus. If auto-negotiation is disa-
bled, set the Forced bit-rate to 10, 100, 1000 or 10 G from the Physical layer
menu.
Note: The 1000 Mb/s rate in electrical interfaces cannot be forced and it is only
available through auto-negotiation due to IEEE 802.3 restrictions.The 10 Gb/s
cannot be auto-negotiated due to restrictions in the same standard. This bit rate is
always forced.
Table 2.5: Ethernet Auto-negotiation Results
Result Description
Local Displays the bit rate and duplex mode supported by the
equipment Port A or Port B.
If the current connector is the RJ-45, the supported bit rates
are 10 Mb/s, 100 Mb/s and 1000 Mb/s (1000FD, 100FD and
10FD). If the connector is set to SFP the supported bit rate is
1000 Mb/s (1000FD).
Remote Displays the bit rate and duplex mode supported by the
remote device connected to Port A or Port B. It is one or sev-
eral of 1000FD, 1000HD, 100FD, 100HD, 10FD, 10HD.
Current Bit rate and duplex operation agreed during the auto-negotia-
tion process. It is one (and only one) of the 1000FD, 100FD
and 10FD set. If there is more than one compatible interface,
the one with higher bit rate is preferred.
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