> # 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:

> - Configuring Buffer Credits on a Generation 2, Generation 3 or Generation 4 Module
> - 48-Port 8-Gbps Advanced Fibre Channel Module BB_Credit Buffers
> - 48-Port 8-Gbps Fibre Channel Module BB_Credit Buffers
> - 24-Port 8-Gbps Fibre Channel Module BB_Credit Buffers
> - 4/44-Port 8-Gbps Host-Optimized Fibre Channel Module BB_Credit Buffers
> - 48-Port 4-Gbps Fibre Channel Module BB_Credit Buffers
> - 24-Port 4-Gbps Fibre Channel Module BB_Credit Buffers
> - 18-Port Fibre Channel/4-Port Gigabit Ethernet Multiservice Module BB_Credit Buffers
> - 4-Port 10-Gbps Switching Module BB_Credit Buffers

> Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.