Configuring Performance Buffers; Configuring Extended Buffer-To-Buffer Credits - Cisco MDS 9000 Series Configuration Manual

Configuring Performance Buffers

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 buffer-to-buffer credits per virtual-link on an ISL:
switch(config-if)# switchport vl-credit vl0 credits vl1 credits vl2 credits vl3 credits
Step 4 (Optional) Reset the buffer-to-buffer credits on the ISL to the default value:
switch(config-if)# switchport vl-credit default
Configuring Performance Buffers
To configure performance buffers for a Fibre Channel interface, perform these steps:
Step 1 Enter configuration mode:
switch# configure terminal
Step 2
Select a Fibre Channel interface and enters interface configuration submode:
switch(config)# interface fcslot/port
Step 3 Set the number of performance buffers on an interface:
switch(config-if)# switchport fcrxbbcredit performance-buffers perf_bufs
(Optional) Reset the number of performance buffers on an interface to the default value:
switch(config-if)# switchport fcrxbbcredit performance-buffers default

Configuring Extended Buffer-to-Buffer Credits

Note You cannot configure regular buffer-to-buffer credits after configuring the extended buffer-to-buffer credits.
To configure a single pool of extended buffer-to-buffer credits for a Fibre Channel interface, perform these
steps. The interface must be in R_RDY flow-control mode.
Before you begin
Enable the Receiver Ready (R_RDY) mode on ISLs before configuring the shared buffer-to-buffer credit
pool. For more information, see
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
118
Disabling Extended Receiver Ready, on page
Configuring Interface Buffers
178.