S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
45-3
Cisco MDS 9000 Family CLI Configuration Guide
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Chapter 45 Configuring IPv4 for Gigabit Ethernet Interfaces
Basic Gigabit Ethernet Configuration for IPv4
•
Configuring Autonegotiation, page 45-3
•
Configuring the MTU Frame Size, page 45-3
•
Configuring Promiscuous Mode, page 45-4
Configuring Interface Descriptions
See the
“About Interface Descriptions” section on page 12-15
for details on configuring the switch port
description for any interface.
Configuring Beacon Mode
See the
“About Beacon Mode” section on page 12-17
for details on configuring the beacon mode for any
interface.
Configuring Autonegotiation
By default, autonegotiation is enabled all Gigabit Ethernet interface. You can enable or disable
autonegotiation for a specified Gigabit Ethernet interface. When autonegotiation is enabled, the port
automatically detects the speed or pause method, and duplex of incoming signals based on the link
partner. You can also detect link up conditions using the autonegotiation feature.
To configure autonegotiation, follow these steps:
Configuring the MTU Frame Size
You can configure the interfaces on a switch to transfer large (or jumbo) frames on a port. The default
IP maximum transmission unit (MTU) frame size is 1500 bytes for all Ethernet ports. By configuring
jumbo frames on a port, the MTU size can be increased up to 9000 bytes.
Note
The minimum MTU size is 576 bytes.
Tip
MTU changes are disruptive, all FCIP links and iSCSI sessions flap when the software detects a change
in the MTU size.
Command
Purpose
Step 1
switch#
config terminal
switch(config)#
Enters configuration mode.
Step 2
switch(config)#
interface gigabitethernet 2/2
switch(config-if)#
Enters the interface configuration mode on the
Gigabit Ethernet interface (slot 2, port 2).
Step 3
switch(config-if)#
switchport auto-negotiate
Enables autonegotiation for this Gigabit
Ethernet interface (default).
switch(config-if)#
no
switchport
auto-negotiate
Disables autonegotiation for this Gigabit
Ethernet interface.