Configuring Buffer-To-Buffer Credit Recovery; Configuring Receive Data Field Size - Cisco MDS 9000 Series Configuration Manual

Configuring Buffer-to-Buffer Credit Recovery

switch(config-if)# switchport vl-credit extended default
Configuring Buffer-to-Buffer Credit Recovery
Buffer-to-buffer credit recovery is enabled by default on all Fibre Channel ports.
To disable the buffer-to-buffer credit recovery on a port, perform these steps:
Step 1 Enter configuration mode:
switch# configure terminal
Step 2
Select the interface and enter interface configuration submode:
switch(config)# interface fc slot/port
Step 3 Disable buffer-to-buffer credit recovery on the interface:
switch(config-if)# no switchport fcbbscn
Step 4
(Optional) To enable buffer-to-buffer credit recovery on an interface if it was disabled:
switch(config-if)# switchport fcbbscn

Configuring Receive Data Field Size

Note From Cisco MDS NX-OS 8.2(1), the switchport fcrxbufsize command is obsolete on the Cisco MDS 9700
48-port 16-Gbps Fibre Channel Switching Module and the Cisco MDS 9700 48-port 32-Gbps Fibre Channel
Switching Module. The receive data field size is permanently set to 2112 bytes. Any receive data field size
configuration from earlier Cisco MDS NX-OS versions is ignored.
To configure the receive data field size, perform these steps:
Step 1
Enter configuration mode:
switch# configure terminal
Step 2 Select a Fibre Channel interface and enter interface configuration submode:
switch(config)# interface fc slot/port
Step 3
Set the data field size for the selected interface:
switch(config-if)# switchport fcrxbufsize bytes
Step 4
(Optional) Reset the receive data field size on the interface to the default value:
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
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Configuring Interface Buffers