Configuration Guidelines For 48-Port And 24-Port 4-Gbps Fibre Channel Switching Modules - Cisco MDS 9000 Series Configuration Manual

Chapter 3 Configuring Fibre Channel Interfaces
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
5.
Configuration Guidelines for 48-Port and 24-Port 4-Gbps Fibre Channel
Switching Modules
The 48-port and 24-port 4-Gbps Fibre Channel switching modules support the following features:
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Migrating from Shared Mode to Dedicated Mode
To configure 48-port and 24-port 4-Gbps Fibre Channel switching modules when starting with the
default configuration or when migrating from shared rate mode to dedicated rate mode, follow these
guidelines:
1.
2.
3.
4.
5.
Migrating from Dedicated Mode to Shared Mode
To configure 48-port and 24-port 4-Gbps Fibre Channel switching modules migrating from dedicated
rate mode to shared rate mode, follow these guidelines:
1.
2.
OL-19445-02, Cisco MDS NX-OS Release 4.2(x)
Configure the traffic speed (1 Gbps, 2 Gbps, 4 Gbps, 8 Gbps, or autosensing with a maximum of 2
Gbps or 4 Gbps) to use.
See the "Configuring Port Speed" section on page
1-Gbps, 2-Gbps, and 4-Gbps speed traffic
Shared and dedicated rate mode
ISL (E or TE) and Fx (F or FL) port modes
Extended BB_credits
Take unused interfaces out of service to release resources for other interfaces, if necessary.
See the "Taking Interfaces Out of Service" section on page
Configure the traffic speed to use (1 Gbps, 2 Gbps, 4 Gbps, or autosensing with a maximum of
2 Gbps or 4 Gbps).
See the "Configuring Port Speed" section on page
Configure the rate mode (dedicated or shared) to use.
See the "Configuring Rate Mode" section on page
Configure the port mode.
ISL ports cannot operate in shared rate mode.
Note
Configure the BB_credits and extended BB_credits, as necessary.
See the "About Extended BB_Credits" section on page
Take unused interfaces out of service to release resources for other interfaces, if necessary.
See the "Taking Interfaces Out of Service" section on page
Configure the BB_credits and extended BB_credits, as necessary.
See the "BB_Credit Buffers for Switching Modules" section on page
Fabric Switches" section on page
Configuring Module Interface Shared Resources
3-19.
3-19.
3-21.
4-17.
4-16, and the "About Extended BB_Credits" section on page
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
3-33.
3-33.
4-6, "BB_Credit Buffers for
4-17.
3-17