Users Guide

Port Characteristics 685
speed {10 | 100 | 1000
| 10000 | auto [100
| 1000 | 2500 | 5000 |
10000 ]}
Configure the speed of a given Ethernet interface or allow
the interface to automatically detect the speed.
If you use the 100, 1000, 2500, 5000, 10000 keywords with
the auto keyword, the port auto-negotiates only at the
specified speeds. Setting the speed without the auto
keyword forces the speed to the single selected value and
disables auto-negotiation. It is possible to configure a fiber
port for a speed not supported by the transceiver. In this
case, the port may or may not link up.
Auto-negotiation should always be used for copper ports
(including SFP and SFP+ DAC cables) as well as
1000BASE-X fiber ports. Auto-negotiation internally
selects the appropriate medium for both ends of the link
and will perform link training (adjusting the pre-emphasis
values) and enables DFE to ensure the highest signal
integrity on copper media.
On combo ports, it is possible to configure auto-
negotiation even if only the fiber interface is active. The
auto-negotiation settings will be utilized when the copper
port is active or a 1000BASE-X transceiver is inserted.
Fiber ports always operate in full-duplex mode.
system jumbo mtu size Enable jumbo frames on the switch by adjusting the
maximum size of a packet.
CTRL + Z Exit to Privileged Exec mode.
show interfaces status Show summary information about all interfaces.
show interfaces
configuration
View a summary of the configuration for all ports.
show interfaces advertise View a summary of the speeds that are advertised on each
port.
show interfaces
description
View configured descriptions for all ports.
show interfaces detail
interface
View detailed information about the specified port.
Command Purpose