Users Guide

Version Description
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.0 Introduced on the S4810.
Usage Information
This command is not applicable for 10–Gigabit and 40–Gigabit Ethernet interfaces.
For 100-Gigabit Ethernet interfaces, CR4 auto-negotiation is enabled by default. You cannot enable or disable FEC
separately. To enable or disable FEC, disable CR4 auto-negotiation rst. Similarly, CR4 auto-negotiation cannot be
enabled if FEC is already enabled or disabled. To enable CR4 auto-negotiation, set to default FEC value using the
fec default command.
For 25–Gigabit and 50–Gigabit Ethernet interfaces, FEC is disabled by default. You can enable or disable FEC and
CR4 auto-negotiation simultaneously.
Related Commands fec default — sets the FEC to default value.show cong — displays the interface conguration.
owcontrol
Control how the system responds to and generates 802.3x pause ow control frames.
Syntax
flowcontrol {rx {off | on} tx {off | on} [negotiate | pause-threshold value |
resume-offset value] | [monitor session-ID]}
To return to the default, use the no form of this command.
Parameters
rx on Enter the keywords rx on to process the received ow control frames on this port.
NOTE: Flow-control packets are mirrored only when ow-control rx is
enabled on an interface.
rx o Enter the keywords rx off to ignore the received ow control frames on this port.
tx on Enter the keywords tx on to send control frames from this port to the connected device
when a higher rate of trac is received.
tx o Enter the keywords tx off so that ow control frames are not sent from this port to
the connected device when a higher rate of trac is received.
pause-threshold Enter the buer threshold limit for generating PAUSE frames.
resume-oset Enter the oset value for generating PAUSE frames to resume trac.
negotiate (Optional) Enter the keyword negotiate to enable the pause-negotiation with the
egress port of the peer device. If the negotiate command is not used, pause-
negotiation is disabled. 40-gigabit Ethernet interfaces do not support pause-negotiation
Interfaces 671