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Version Description
9.10(0.0) Introduced on the S6100–ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.0 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
8.1.1.0 Introduced on the E-Series.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
pre-6.2.1.0 Introduced on the E-Series.
Usage
Information
This command is supported on 10/100/1000 Base-T Ethernet interfaces.
The no negotiation auto command is only available if you first manually set the speed of a port to
10Mbits or 100Mbits.
The negotiation auto command provides a mode option for configuring an individual port to forced-
master/forced slave after you enable auto-negotiation.
NOTE: The mode option is not available on non-10/100/1000 Base-T systems.
If you do not use the mode option, the default setting is slave. If you do not configure forced-master or
forced-slave on a port, the port negotiates to either a master or a slave state. Port status is one of the
following:
● Forced-master
● Force-slave
● Master
● Slave
● Auto-neg Error — typically indicates that both ends of the node are configured with forced-master or
forced-slave.
CAUTION: Ensure that one end of your node is configured as forced-master and one
is configured as forced-slave. If both are configured the same (that is, forced-master
or forced-slave), the show interfaces command flaps between an auto-neg-error and
forced-master/slave states.
You can display master/slave settings with the show interfaces command.
Example
(Master/Slave)
Example
(Configured)
User Information
Both sides of the link must have auto-negotiation enabled or disabled for the link to come up.
The following details the possible speed and auto-negotiation combinations for a line between two
10/100/1000 Base-T Ethernet interfaces.
Port 0
● auto-negotiation enabled* speed 1000 or auto
● auto-negotiation enabled speed 100
Interfaces 663