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Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
Chapter 3 Configuring Fibre Channel Interfaces
Configuring Fibre Channel Interfaces
Note If you change the port bandwidth reservation parameters on a 48-port or 24-port 4-Gbps module, the
change affects only the changed port. No other ports in the port group are affected.
To configure the 4-Gbps and 8-Gbps Fibre Channel switching modules when starting with the default
configuration or when migrating from shared rate mode to dedicated rate mode, follow these steps:
Step 1 Take unused interfaces out of service to release resources for other interfaces, if necessary.
See the “Taking Interfaces Out of Service” section on page 3-41.
Step 2 Configure the traffic speed to use (1 Gbps, 2 Gbps, 4 Gbps, 8 Gbps, or autosensing with a maximum of
2
Gbps or 4 Gbps).
See the “Configuring Port Speed” section on page 3-29.
Step 3 Configure the rate mode (dedicated or shared).
See the “Configuring Rate Mode” section on page 3-30.
Step 4 Configure the port mode.
See the “Configuring Interface Modes” section on page 2-22.
Note ISL ports cannot operate in shared rate mode.
Step 5 Configure the BB_credits and extended BB_credits, as necessary.
See the “Configuring Buffer-to-Buffer Credits” section on page 4-21 and the “Configuring Extended
BB_credits” section on page 4-23.
Task Flow for Migrating Interfaces from Dedicated Mode to Shared Mode
To configure the 4-Gbps and 8-Gbps Fibre Channel switching modules migrating from dedicated rate
mode to shared rate mode, follow these steps:
Step 1 Take unused interfaces out of service to release resources for other interfaces, if necessary.
See the “Taking Interfaces Out of Service” section on page 3-41.
Step 2 Configure the BB_credits and extended BB_credits, as necessary.
See the “Configuring Buffer-to-Buffer Credits” section on page 4-21, and the “Extended BB_Credits”
section on page 4-17.
Step 3 Configure the port mode.
See the “Configuring Interface Modes” section on page 2-22.
Note ISL ports cannot operate in shared rate mode.
Step 4 Configure the rate mode (dedicated or shared) to use.
See the “Configuring Rate Mode” section on page 3-30.
