Configuring Extended Buffer-To-Buffer Credits For Virtual Links - Cisco MDS 9000 Series Configuration Manual

Configuring Interface Buffers
Step 1
Enter configuration mode:
switch# configure terminal
Step 2 Enable the extended Buffer-to-Buffer Credits feature:
switch(config)# fcrxbbcredit extended enable
Step 3
Select a Fibre Channel interface and enter interface configuration submode:
switch(config)# interface fc slot/port
Step 4 Set the extended buffer-to-buffer credits as a single pool on an interface:
switch(config-if)# switchport fcrxbbcredit extended extend_bufs mode {E | Fx}
Step 5
(Optional) Reset the extended buffer-to-buffer credits on the interface to the default value:
switch(config-if)# switchport fcrxbbcredit extended default

Configuring Extended Buffer-to-Buffer Credits for Virtual Links

Note You cannot configure regular buffer-to-buffer credits after configuring the extended buffer-to-buffer credits.
To configure per-virtual-link extended 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
Step 1 Enter configuration mode:
switch# configure terminal
Step 2 Enable the extended Buffer-to-Buffer Credits feature:
switch(config)# fcrxbbcredit extended enable
Step 3
Select a Fibre Channel interface and enter interface configuration submode:
switch(config)# interface fc slot/port
Step 4
Set the extended buffer-to-buffer credits per virtual link on an ISL:
switch(config-if)# switchport vl-credit extended vl0 credits vl1 credits vl2 credits vl3 credits
Step 5
(Optional) Reset the extended buffer-to-buffer credits on the ISL to the default value:
Configuring Extended Buffer-to-Buffer Credits for Virtual Links
Enabling Extended Receiver Ready, on page
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