Bb_Credit Buffers For Switching Modules; Port 4-Gbps Fibre Channel Module Bb_Credit Buffers - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Chapter 22 Configuring Generation 2 Switches and 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
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:
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•
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48-port 4-Gbps Fibre Channel Module BB_Credit Buffers

Table 22-5
Table 22-5
BB_Credit Buffer Allocation Type
User configurable BB_credit buffers
1. ISL = E port or TE port.
The following considerations apply to BB_credit buffers on 48-port 4-Gbps Fibre Channel switching
modules:
OL-16184-01, Cisco MDS SAN-OS Release 3.x
All ports
shared (4 Gpbs)
16 BB credits
1 Gbps
250 BB credits
48-port 4-Gbps Fibre Channel Module BB_Credit Buffers
24-port 4-Gbps Fibre Channel Module BB_Credit Buffers, page 22-11
18-Port Fibre Channel/4-Port GigabitEthernet Multiservice Module BB_Credit Buffers, page 22-12
Figure 22-5Example Speed and Rate Configuration on a 24-Port 4-Gbps Switching Module,
page 22-12
4-Port 10-Gbps Switching Module BB_Credit Buffers, page 22-13
lists the BB_credit buffer allocation for 48-port 4-Gbps Fibre Channel switching modules.
48-Port 4-Gbps Switching Module BB_Credit Buffer Allocation Defaults
24-port module
Mixed
Dedicated
16 BB credits
2 Gbps
250 BB credits
BB_Credit Buffers Per Port Defaults
Dedicated Rate Mode
BB_Credit
4-Gbps Speed
Buffers Per
Module ISL
6000 125
Cisco MDS 9000 Family CLI Configuration Guide
Buffer Credit Allocation
All ports
dedicated (2 Gbps)
250 BB credits
Shared
4 Gbps
250 BB credits
Shared Rate Mode
4-Gbps Speed
1 1
Fx Port ISL
16 16
Fx Port
16
22-9