Specifications

Chapter 5. IBM System Networking RackSwitch implementation 157
5.1.2 Port settings configuration
The physical connections details are provided in the Chapter 3, “Reference architectures” on
page 107. Most Layer 1 aspects do not involve any configuration. In this section, we provide
some useful commands for ports verification, that is, to make sure all the links are up and
running before proceeding to upper layer configuration.
Additional commands and details for Layer 1 configuration can be found in the technical
documentation listed in 5.5, “More information” on page 238
Port link configuration
IBM RackSwitch switches include a factory default configuration that enables interfaces with
the following link settings:
򐂰 In all the copper Gigabit Ethernet interfaces:
– Auto-negotiation is set.
– The speed for 10/100/1000 RJ45 (copper) Gigabit Ethernet interfaces is set to auto, so
that the interface can operate at 10 Mbps, 100 Mbps, or 1 Gbps. The link operates at
the highest possible speed, depending on the capabilities of the remote end. If the
speed is manually set to 1 Gbps, the duplex operation is automatically set to full.
– The duplex mode is set to auto.
– The flow control is set to none.
򐂰 In all the fiber Gigabit Ethernet interfaces:
– No auto-negotiation is set.
– The speed is set to 1 Gbps.
– THe duplex mode is set to full.
– The flow control is set to none.
򐂰 In all the fiber 10 Gigabit Ethernet interfaces:
– No auto-negotiation is set.
– The speed is set to 10 Gbps.
– The duplex mode is set to full.
– The flow control is set to none.
All the ports used in this implementation are 10 Gbps or 40 Gbps and default to no
auto-negotiation / full-duplex. There is no need for speed or duplex configuration.
The port configuration-related commands are listed in this section.
To change the default link parameters on Gigabit Ethernet interfaces of the RackSwitches,
enter one of the following interface/portchannel configuration level commands:
򐂰 RackSwitch(config-if)#speed {10|100|1000|auto}
򐂰 RackSwitch(config-if)#duplex {full|half|any}
򐂰 RackSwitch(config-if)#[no] flowcontrol {receive|send|both}
򐂰 RackSwitch(config-if)#[no] auto
To temporarily disable a port, run the following command:
RackSwitch#interface port <Port alias or number> shutdown
Interface parameters: The default interface parameters are not listed in the configuration.