Cisco AP775A - Nexus Converged Network Switch 5010 User Manual

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20-27
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 20 Configuring Interfaces
Buffer Credits
Configuring Performance Buffers
To configure performance buffers for a Fibre Channel interface using Fabric Manager, follow these
steps:
Step 1 Expand Switches > Interfaces and then select FC Physical.
You see the interface configuration in the Information pane.
Step 2 Click the BB Credit tab.
You see performance buffer information in the columns Perf Bufs Admin and Perf Bufs Oper.
Step 3 Set the performance buffers for an interface.
Step 4 Click Apply Changes.
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, page 20-27
• Extended BB_credits on Generation 2 and Generation 3 Switching Modules, page 20-28
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:
• Obtain the ENTERPRISE_PKG license (see Chapter 10, “Obtaining and Installing Licenses”).
• 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 Figure 20-13).
Figure 20-13 Port Group Support for the Extended BB_Credits Feature
The port groups that support extended credit configurations are as follows:
– Any one port in ports 1 to 4 (identified as Group 1 in Figure 20-2).
– Any one port in ports 5 to 8 (identified as Group 2 in Figure 20-2).
– Any one port in ports 9 to 12 (identified as Group 3 in Figure 20-2).
—SPEED LINK—
LINK-
—SPEEDLINK—
STATUS
1 56789
LINK— —SPEED
10 11 12 13 14234
12
LINK-
GIGABIT E THERNET
120479
Group 1 Group 2 Group 3
Extended credits
not supported

Cisco AP775A - Nexus Converged Network Switch 5010 Specifications

General

Brand	Cisco
Model	AP775A - Nexus Converged Network Switch 5010
Category	Switch
Language	English