Cisco Systems DSC9148D8G48PK9 manual Configuring Performance Buffers

Chapter 4 Configuring Interface Buffers

Configuring Interface Buffers

	Command	Purpose
Step 3
	switch(config-if)#switchport fcrxbbcredit	Applies the default operational value to the
	default	selected interface. The operational value depends
		on the port mode. The default values are assigned
		based on the port capabilities.
	switch(config-if)#switchport fcrxbbcredit 5	Assigns a BB_credit of 5 to the selected interface.
		The range to assign BB_credits is between 1 and
		255.
	switch(config-if)#switchport fcrxbbcredit 5	Assigns this value if the port is operating in E or
	mode E	TE mode. The range to assign BB_credits is
		between 1 and 255.
	switch(config-if)#switchport fcrxbbcredit 5	Assigns this value if the port is operating in F or
	mode Fx	FL mode. The range to assign BB_credits is
		between 1 and 255.
Step 4
	switch(config-if# do show int fc1/1	Displays the receive and transmit BB_credit
		along with other pertinent interface information
		for this interface.
		Note The BB_credit values are correct at the
		time the registers are read. They are
		useful to verify situations when the data
		traffic is slow.

This example shows the output of the show int fc1/1 command:

intfc1/1 is up

...

16 receive B2B credit remaining

3 transmit B2B credit remaining

Configuring Performance Buffers

Detailed Steps

To configure performance buffers for a Fibre Channel interface, follow these steps:

	Command	Purpose
Step 1
	switch# config t	Enters configuration mode.
Step 2
	switch(config)# interface fc1/1	Selects a Fibre Channel interface and enters interface
	switch(config-if)#	configuration submode.
Step 3
	switch(config-if)# switchport	Assigns a performance buffer of 45 to the selected
	fcrxbbcredit performance-buffers 45	interface. The value ranges from 1 to 145.
	switch(config-if)# switchport	Reverts to the factory default of using the built-in
	fcrxbbcredit performance-buffers default	algorithm.

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
4-22	OL-29284-01, Release 6.x