Bb_Credit Buffers For Fabric Switches; Cisco Mds 9134 Fabric Switch Bb_Credit Buffers; Cisco Mds 9124 Fabric Switch Bb_Credit Buffers - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

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
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Note

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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Cisco MDS 9134 Fabric Switch BB_Credit Buffers

Table 22-10
Table 22-10
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 32-port 4-Gbps switches:
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Cisco MDS 9124 Fabric Switch BB_Credit Buffers

Table 22-11
Table 22-11
BB_Credit Buffer Allocation Type
User configurable BB_credit buffers
1. ISL = E port or TE port.
Cisco MDS 9000 Family CLI Configuration Guide
22-14
There are 4488 extra buffers available as extended BB_credits after allocating all the default
BB_credit buffers for all the ports in ISL mode (5488 - (250 * 4)).
Extended BB_credits are allocated across all ports on the switch. That is, they are not allocated
by port group.
Cisco MDS 9134 Fabric Switch BB_Credit Buffers
Cisco MDS 9124 Fabric Switch BB_Credit Buffers, page 22-14
Cisco MDS 9222i Multiservice Modular Switch BB_Credit Buffers, page 22-15
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 for connections can be configured from a minimum of 2 buffers to a maximum of
250 buffers per port.
BB_credit buffers for Fx port mode connections can be configured from a minimum of 2 buffers to
a maximum of 250 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
Chapter 22 Configuring Generation 2 Switches and Modules
BB_Credit
Buffers Per BB_Credit Buffers Per Port
Port Group Defaults
1
ISL
64 64
BB_Credit
Buffers Per BB_Credit Buffers Per Port
Port Group Defaults
1
ISL
64 16
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Fx Port
64
Fx Port
16