Clearing The Alpa Cache; Administrative Speeds; Interface Descriptions; Buffer-To-Buffer Credits - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Fibre Channel Interfaces
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 .

Clearing the ALPA Cache

The clear tlport alpa-cache command clears the entire content of the ALPA cache.

Administrative Speeds

By default, the administrative speed for an interface is automatically calculated by the switch.
Caution Changing the administrative speed is a disruptive operation.
To configure the administrative speed of the interface, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface mgmt0
Step 3
switch(config-if)# switchport speed 1000
switch(config-if)#
switch(config-if)# switchport speed
switch(config-if)#

Interface Descriptions

To configure a description for an interface, follow these steps:
Command
Step 1
switch# config t
Step 2
switch(config)# interface fc1/1
switch(config-if)#
Step 3
switch(config-if)# switchport description cisco-HBA2
switch(config-if)# no switchport description

Buffer-to-Buffer Credits

Buffer-to-buffer credits (BB_credits) are a flow control mechanism to ensure that FC switches do not
run out of buffers, because switches must not drop frames. BB_credits are negotiated on a per-hop basis.
The receive BB_credit (
you do not need to modify the default configuration.
Cisco MDS 9000 Family Configuration Guide
11-12
Purpose
Enters configuration mode.
Selects the mgmt0 interface and enters interface
configuration mode.
Configures the administrative speed of the interface to
1000 Mbps.
The number indicates the speed in megabits per
second (Mbps). You can set the speed to 1000 (for
1-Gbps interfaces), 2000 (for 2-Gbps interfaces), or
auto (default).
Reconfigures the factory default (auto) administrative
speed of the interface.
) value may be configured for each FC interface. In most cases,
fcrxbbcredit
Chapter 11 Configuring Interfaces
Purpose
Enters configuration mode.
Configures the specified interface.
Configures the description of the
interface.
The string may be up to 80 characters
long.
Clears the description of the interface.
OL-6973-03, Cisco MDS SAN-OS Release 2.x