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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 3 Configuring Fibre Channel Interfaces
Configuring Fibre Channel Interfaces
See the “Configuring Buffer-to-Buffer Credits” section on page 4-21, and the “Configuring Extended
BB_credits” section on page 4-23.
Configuring Port Speed
Restrictions
• Changing port speed and rate mode disrupts traffic on the port. Traffic on other ports in the port
group is not affected.
Detailed Steps
To configure the port speed on an interface on a 4-Gbps or 8-Gbps switching module, follow these steps:
Command Purpose
Step 1
switch# config t
switch(config)#
Enters configuration mode.
Step 2
switch(config)# interface fc 1/1
switch(config-if)#
Selects the interface and enters interface
configuration submode.
Step 3
switch(config-if)# switchport speed 4000
Configures the port speed in megabits per
second. Valid values are 1000, 2000, 4000 and
auto. The auto parameter enables autosensing on
the interface.
switch(config-if)# switchport speed 8000
(8-Gbps modules only
1
) Configures the port
speed in megabits per second to 8-Gbps. Valid
values are 1000, 2000, 4000, 8000 and auto. The
auto parameter enables autosensing on the
interface.
switch(config-if)# switchport speed auto
On 4-Gbps modules, configures autosensing for
the interface with 4 Gbps of bandwidth
reserved.
On 8-Gbps modules, configures autosensing for
the interface with 8 Gbps of bandwidth
reserved.
2
switch(config-if)# switchport speed auto max
2000
Configures autosensing with a maximum of
2 Gbps of bandwidth reserved.
switch(config-if)# switchport speed auto max
4000
(8-Gbps modules only
1
) Configures autosensing
with a maximum of 4Gbps of bandwidth
reserved.
switch(config-if)# no switchport speed
Reverts to the default
2
speed for the interface
(auto).
1. The 8000 and auto max 4000 speed configurations are available only for the 8-Gbps modules.
2. The default speed on 48-port and 24-port 4-Gbps modules is 4000. The default speed on 48-port and 24-port 8-Gbps modules is 8000.
The default speed on the 4/44-port 8-Gbps module is auto max 4000.
