Cisco Systems DSC9148D8G48PK9 manual Configuring Extended BBcredits

Chapter 4 Configuring Interface Buffers

Configuring Interface Buffers

Note Use the show interface bbcredit command to display performance buffer values and other BB_credit information.

Configuring Extended BB_credits

Detailed Steps

To configure extended BB_credits for a MDS-14/2 interface, for a Generation 2 switching module interface (not including the Cisco MDS 9124 Fabric Switch), or for an interface in a Cisco MDS 9216i switch, follow these steps:

	Command	Purpose
Step 1
	switch# config t	Enters configuration mode.
	switch(config)#
Step 2
	switch(config)# fcrxbbcredit extended enable	Enables the extended BB_credits feature.
	switch(config)# no fcrxbbcredit extended	Disables (default) the extended BB_credits
	enable	feature.
Step 3
	switch(config)# interface fc1/1	Selects a Fibre Channel interface and enters
	switch(config-if)#	interface configuration submode.
Step 4
	switch(config-if)#switchport fcrxbbcredit	Applies the extended BB_credit value of 1,500
	extended 1500	credits to the selected interface. The valid range is
		from 256 to 3,500 credits.
	switch(config-if)# no switchport	Clears the configured extended BB_credit
	fcrxbbcredit extended 1500	configuration for this port.
Step 5
	switch# do show interface fc3/2	Displays the receive and transmit BB_credit
	fc3/2 is trunking	values along with other pertinent interface
	Hardware is Fibre Channel, SFP is short wave	information for this interface if the interface is in
	laser w/o OFC (SN)
		the up state.
	Port WWN is 20:82:00:05:30:00:2a:1e
	Peer port WWN is 20:42:00:0b:46:79:f1:80	Note	The receive BB_credit value reflects the
	Admin port mode is auto, trunk mode is		extended BB_credit configuration, if
	on
			applicable.
	Port mode is TE
	Port vsan is 1
	Speed is 2 Gbps
	Transmit B2B Credit is 255
	Receive B2B Credit is 1500
	Receive data field Size is 2112
	...

	Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x		4-23