Bb_Credit Buffers For Switching Modules - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Chapter 15 Configuring Generation 2 and Generation 3 Switching Modules
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
Figure 15-4
switching modules. The minimum BB_credits required to bring up a port is two buffers.
Figure 15-4
Figure 15-5
The minimum BB_credits required to bring up a port is two buffers.
Figure 15-5
The default BB_credit buffer allocation is the same for all port speeds.
Note

BB_Credit Buffers for Switching Modules

This section describes how buffer credits are allocated to Cisco MDS 9000 switching modules, and
includes the following topics:
•
•
•
OL-18084-01, Cisco MDS NX-OS Release 4.x
shows the default BB_credit buffer allocation model for 4/44-port 8-Gbps Host-Optimized
BB_Credit Buffer Allocation in 4/44-port 8-Gbps Switching Modules
All ports
shared (8 Gpbs)
32 BB credits
Dedicated
1 Gbps
250 BB credits 250 BB credits
shows the default BB_credit buffer allocation model for 24-port 4-Gbps switching modules.
BB_Credit Buffer Allocation in 24-port 4-Gbps Switching Modules
All ports
shared (4 Gpbs)
16 BB credits
1 Gbps
250 BB credits
48-Port 8-Gbps Fibre Channel Module BB_Credit Buffers, page 15-12
24-Port 8-Gbps Fibre Channel Module BB_Credit Buffers, page 15-13
4/44-Port 8-Gbps Host-Optimized Fibre Channel Module BB_Credit Buffers, page 15-14
4/44-port module
Mixed
2 Gbps 4 Gbps
250 BB credits
24-port module
Mixed
Dedicated
2 Gbps
250 BB credits
Cisco MDS 9000 Family CLI Configuration Guide
Buffer Credit Allocation
All ports
dedicated (2 Gbps)
125 BB credits
Shared
32 BB credits
8 Gbps
125 BB credits
All ports
dedicated (2 Gbps)
250 BB credits
Shared
16 BB credits
4 Gbps
250 BB credits
15-11