Cisco MDS 9000 Series Configuration Manual page 125

Chapter 4 Configuring Interface Buffers
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 4-8
Dedicated
18-Port Fibre Channel/4-Port Gigabit Ethernet Multiservice Module BB_Credit Buffers
Table 4-5
Table 4-6
BB_Credit Buffer Allocation
Default BB_credit buffers
Maximum BB_credit buffers
Total number of BB_credit buffers per module
1. ISL = E port or TE port.
The following considerations apply to BB_credit buffers on18-port 4-Gbps Fibre Channel switching
modules:
•
•
•
12-Port 4-Gbps Switching Module BB_Credit Buffers
Table 4-7
Table 4-7
BB_Credit Buffer Allocation Type
Default BB_credit buffers
Maximum BB_credit buffers
Default Performance buffers
OL-19445-02, Cisco MDS NX-OS Release 4.2(x)
Example Speed and Rate Configuration on a 24-Port 4-Gbps Switching Module
2
1
4-Gbps 4-Gbps
Dedicated
lists the BB_credit buffer allocation for 18-port 4-Gbps multiservice modules.
18-Port 4-Gbps Multiservice Module BB_Credit Buffer Allocation
BB_credit buffers for ISL connections can be configured from a minimum of 2 buffers to a
maximum of 250 buffers for dedicated rate mode or 16 buffers for shared rate mode.
BB_credit buffers for Fx port mode connections can be configured. The minimum is 2 buffers and
the maximum of 250 buffers for dedicated rate mode or 16 buffers for shared rate mode.
Performance buffers are not supported on this module.
lists the BB_credit buffer allocation for 12-port 4-Gbps switching modules.
12-Port 4-Gbps Switching Module BB_Credit Buffer Allocation
3 4
4-Gbps 1-Gbps
Dedicated
Shared
BB_Credit Buffers Per Port
Dedicated Rate Mode
4-Gbps Speed
1
ISL
250
250
4509
BB_Credit Buffers Per Port
Dedicated Rate Mode
4-Gbps Speed
ISL
250
250
145
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
5 6
1-Gbps 1-Gbps
Shared
Shared
Shared Rate Mode
4-Gbps Speed
1
Fx Port ISL
16 16
250 16
1
Fx Port
16
16
12
Buffer Pools
Fx Port
16
16
4-13