Extended Bb_Credits On Generation 1 Switching Modules - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Chapter 20 Configuring Interfaces
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
Configuring Performance Buffers
To configure performance buffers for a Fibre Channel interface using Fabric Manager, follow these
steps:
Expand Switches > Interfaces and then select FC Physical.
Step 1
You see the interface configuration in the Information pane.
Click the BB Credit tab.
Step 2
You see performance buffer information in the columns Perf Bufs Admin and Perf Bufs Oper.
Set the performance buffers for an interface.
Step 3
Click Apply Changes.
Step 4
About Extended BB_credits
You can use the extended BB_credits flow control mechanism in addition to BB_credits for long haul
links.
This section includes the following topics:
•
•

Extended BB_credits on Generation 1 Switching Modules

The BB_credits feature allows you to configure up to 255 receive buffers on Generation 1 switching
modules. To facilitate BB_credits for long haul links, you can configure up to 3,500 receive BB_credits
on a Fibre Channel port on a Generation 1 switching module.
To use this feature on Generation 1 switching modules, you must meet the following requirements:
•
•
Figure 20-13
STATUS
OL-17256-03, Cisco MDS NX-OS Release 4.x
Extended BB_credits on Generation 1 Switching Modules, page 20-27
Extended BB_credits on Generation 2 and Generation 3 Switching Modules, page 20-28
Obtain the ENTERPRISE_PKG license (see
Configure this feature in any port of the full-rate 4-port group in either the Cisco MDS 9216i Switch
or in the MPS-14/2 module (see
Port Group Support for the Extended BB_Credits Feature
1 2 3 4 5 6
LINK— —SPEED LINK—
Group 1 Group 2
The port groups that support extended credit configurations are as follows:
Any one port in ports 1 to 4 (identified as Group 1 in
–
Any one port in ports 5 to 8 (identified as Group 2 in
–
Any one port in ports 9 to 12 (identified as Group 3 in
–
Chapter 10, "Obtaining and Installing
Figure 20-13).
7 8 9 10 11 12 13 14
—SPEED LINK— —SPEED
Group 3
Cisco MDS 9000 Family Fabric Manager Configuration Guide
1 2
LINK- LINK-
GIGABIT E THERNET
Extended credits
not supported
Figure 20-2).
Figure 20-2).
Figure 20-2).
Buffer Credits
Licenses").
20-27