Configuring Interface Buffers; Configuring Buffer-To-Buffer Credits; Configuring Buffer-To-Buffer Credits For Virtual Links - Cisco MDS 9000 Series Configuration Manual

Configuring Interface Buffers

Configuring Interface Buffers

Configuring Buffer-to-Buffer Credits

Note When you configure port mode to auto or E, and rate mode to dedicated for all the ports in the global buffer
pool, you must reconfigure buffer credits on one or more ports (other than the default mode).
To configure a single pool of 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
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 as a single pool on an interface:
switch(config-if)# switchport fcrxbbcredit credits mode {E | Fx}
(Optional) Reset the buffer-to-buffer credits on the interface to the default value:
switch(config-if)# switchport fcrxbbcredit default

Configuring Buffer-to-Buffer Credits for Virtual Links

Note
When you configure port mode to auto or E, and rate mode to dedicated for all the ports in the global buffer
pool, you must reconfigure buffer credits on one or more ports (other than the default mode).
To configure per-virtual-link buffer-to-buffer credits for a Fibre Channel interface, perform these steps. The
interface must be an ISL in ER_RDY flow-control mode.
Before you begin
Enable the Extended Receiver Ready (ER_RDY) mode on ISLs before configuring the virtual-link credits.
For more information, see
Disabling Extended Receiver Ready, on page
Enabling Extended Receiver Ready, on page
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Configuring Interface Buffers
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