Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual page 394

Buffer Credit Allocation
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 15-2
The minimum BB_credits required to bring up a port is two buffers.
Figure 15-2
Figure 15-3
The minimum BB_credits required to bring up a port is two buffers.
Figure 15-3
Cisco MDS 9000 Family CLI Configuration Guide
15-10
shows the default BB_credit buffer allocation model for 48-port 8-Gbps switching modules.
BB_Credit Buffer Allocation in 48-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 8-Gbps switching modules.
BB_Credit Buffer Allocation in 24-port 8-Gbps Switching Modules
All ports
shared (8 Gpbs)
32 BB credits
Dedicated
1 Gbps
500 BB credits 500 BB credits
Chapter 15 Configuring Generation 2 and Generation 3 Switching Modules
48-port module
Mixed
2 Gbps 4 Gbps
250 BB credits
24-port module
Mixed
2 Gbps 4 Gbps
500 BB credits
All ports
dedicated (2 Gbps)
250 BB credits
Shared
32 BB credits
8 Gbps
250 BB credits
All ports
dedicated (2 Gbps)
500 BB credits
Shared
32 BB credits
8 Gbps
500 BB credits
OL-18084-01, Cisco MDS NX-OS Release 4.x