Bb_Credit Buffers For Fabric Switches; Cisco Mds 9134 Fabric Switch Bb_Credit Buffers; Cisco Mds 9124 Fabric Switch Bb_Credit Buffers - 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

BB_Credit Buffers for Fabric Switches

This section describes how buffer credits are allocated to Cisco MDS 9000 Fabric switches, and includes
the following topics:
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•
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Cisco MDS 9134 Fabric Switch BB_Credit Buffers

Table 15-15
Table 15-15
BB_Credit Buffer Allocation Type
User-configurable BB_credit buffers on 4-Gbps
mode
Default BB_credit buffers
1. ISL = E port or TE port.
The following considerations apply to BB_credit buffers on 32-port 4-Gbps switches:
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•
•
•

Cisco MDS 9124 Fabric Switch BB_Credit Buffers

Table 15-16
Table 15-16
BB_Credit Buffer Allocation Type
User-configurable BB_credit buffers
OL-18084-01, Cisco MDS NX-OS Release 4.x
Cisco MDS 9134 Fabric Switch BB_Credit Buffers, page 15-21
Cisco MDS 9124 Fabric Switch BB_Credit Buffers, page 15-21
Cisco MDS 9222i Multiservice Modular Switch BB_Credit Buffers, page 15-22
lists the BB_credit buffer allocation for 32-port 4-Gbps Fibre Channel switches.
32-Port 4-Gbps Switching Module BB_Credit Buffer Allocation Defaults
BB_credit buffers can be configured from a minimum of 1 buffer to a maximum of 61 buffers per
port when the ports are in F mode and in 4-Gbps speed mode.
BB_credit buffers can be configured from a minimum of 2 buffers to a maximum of 64 buffers per
port when the ports are in auto or E mode and in 4-Gbps speed mode.
BB_credit buffers can be configured from a minimum of 64 buffers to a maximum of 64 buffers per
port when a port is in 10-Gbps speed mode. There can be only one port per port group configured
in 10-Gbps mode. The rest of the three ports must be in down state.
BB_credit buffers for Fx port mode connections can be configured from a minimum of 2 buffers to
a maximum of 64 buffers.
lists the BB_credit buffer allocation for 24-port 4-Gbps Fibre Channel switches.
24-Port 4-Gbps Switching Module BB_Credit Buffer Allocation Defaults
BB_Credit
Buffers Per
Port Group BB_Credit Buffers Per Port
1
ISL
64 64
64 16
BB_Credit
Buffers Per BB_Credit Buffers Per Port
Port Group Defaults
1
ISL
64 16
Cisco MDS 9000 Family CLI Configuration Guide
Buffer Credit Allocation
Fx Port
64
16
Fx Port
16
15-21