> # Configuring Port Speed

> ## Restrictions

> - Changing port speed and rate mode disrupts traffic on the port. Traffic on other ports in the port group is not affected.

> ## Detailed Steps

> To configure dedicated bandwidth on an interface using DCNM-SAN, follow these steps:

> 1. From the Fabric pane, select a switch or select a group of switches (SAN, fabric, VSAN) from the Logical Domains pane.
> 2. Expand Switches, expand FC Interfaces and select Physical from the Physical Attributes pane.

> You see the Physical > General tab in the Interfaces pane.

> 3. Scroll until you see the row containing the switch and port you want to configure.
> 4. Select auto, 1Gb, 4Gb, or autoMax2G from the Speed Admin column.

> Note The Generation 3, 8-Gbps Fibre Channel switching modules support the following speed configurations: 1G, 2G, 4G, 8G, autoMax2G, autoMax4G and the auto speed configuration configures autosensing for the interface with 8 Gbps of bandwidth reserved.

> The auto parameter enables autosensing on the interface. The autoMax2G parameter enables autosensing on the interface with a maximum speed of 2 Gbps.

> Note If you change the port bandwidth reservation parameters on a 48-port or 24-port 4-Gbps, or any 8-Gbps Fibre Channel switching module, the change affects only the changed port. No other ports in the port group are affected.

> 5. Click the Apply Changes icon.
> .

> Copyright 2010-2015, Cisco Systems, Inc. All rights reserved.