48-Port 16-Gbps Fibre Channel Module Buffer-To-Buffer Credit Buffers - Cisco MDS 9000 Series Configuration Manual

Configuring Interface Buffers
• If you have configured extended buffer credits of 8270 in Cisco MDS NX-OS Release 8.1(1) and Release
• If you have installed an enterprise license, per port credits in a port group can be increased up to 8191
• In a port group, if all ports are moved to F mode except one port, then the maximum available buffer
• If you configure a port to the fixed 4 Gbps or 8 Gbps speed, the port consumes one extra buffer from the
• The extended buffer feature can be activated by using the following commands:
Note
In Cisco MDS 9700 Series Switches module, each port group comprises of 16 ports, and there are 3 port
groups per ASIC. Port group buffers can be allocated to any combination of ports in that port group using
extended buffer configuration. Refer to the show port-resource module module_number command for details
about buffers supported by port-groups.

48-Port 16-Gbps Fibre Channel Module Buffer-to-Buffer Credit Buffers

Table 15: 48-Port 16-Gbps Switching Module Buffer-to-Buffer Credit Buffer Allocation, on page 111
buffer-to-buffer credit buffer allocation for the 48-port 16-Gbps Fibre Channel switching module
(DS-X9448-768K9).
Table 15: 48-Port 16-Gbps Switching Module Buffer-to-Buffer Credit Buffer Allocation
Buffer-to-Buffer
Credit Buffer
Allocation
Default
buffer-to-buffer
credit buffers
Maximum
buffer-to-buffer
credit buffers
8.2(1) and if you are upgrading to Release 8.3(1), ensure that you configure the extended buffer credits
to 8191 before upgrading.
using extended buffer to buffer credits when ports are moved to minimum credits.
Note From Cisco MDS NX-OS Release 8.3(1), the maximum available buffer credits
are 8270. However, the cli restricts the per port credits to be increased to only
8191.
credits for the port is 7805.
buffer pool.
switch(config)# interface fc1/5
switch(config-if)# switchport fcrxbbcredit extended 8191
Buffer-to-Buffer Credit Buffers Per Port
Dedicated Rate Mode 2-Gbps to 16-Gbps Speed
ISL
500
500
48-Port 16-Gbps Fibre Channel Module Buffer-to-Buffer Credit Buffers
Cisco MDS 9000 Series Interfaces Configuration Guide, Release 8.x
Fx Port
32
500
lists the
111