Dell Brocade G620 Brocade 8.0.1 Fabric OS Command Reference - Page 230

ethIf ethIf Displays and sets the link operating mode for a network interface. Synopsis ethif --set interface -auto-negotiate | -an [on | off] -speed [speed] -duplex [full | half] ethif --reseterror interface ethif --show interface ethif --help Description Use this command to set and view the link operating mode for a network interface. Changing the link mode is not supported for all network interfaces or for all Ethernet network interfaces. On the CP of a Brocade DCX or DCX-4S, this command supports eth0 and eth3 as interface parameters. On all other platforms, only eth0 is supported. The CP on a Brocade DCX or DCX-4S has two external physical Ethernet management ports, eth0 and eth3. Both interfaces are bonded together to form a single logical interface, bond0. The management port IP addresses are assigned to the logical interface, bond0. Link layer Ethernet operations are applied to the physical interfaces, eth0 and eth3. Ethernet bonding provides link layer redundancy using the active-standby failover model. The two Ethernet ports must be part of the same subnet. By default, all traffic is transmitted over the active Ethernet port, eth0. The second Ethernet port, eth3, acts as a standby interface and no traffic is transmitted over it. When the active Ethernet port is disconnected, the alternate Ethernet port becomes active. When the system reboots, the Ethernet port eth0 is always made active if it is connected. When executed with the bond0 operand, ethif --show displays the active Ethernet port. When selecting autonegotiation, you can choose the specific link operating modes that are advertised to the link partner. At least one common link operating mode must be advertised by both sides of the link. When forcing the link operating mode, both sides of the link must be forced to the same mode. The link does not work reliably if one side is set to autonegotiate and the other side is set to forced mode. Exercise care when using this command. Forcing the link to an operating mode not supported by the network equipment to which it is attached may result in an inability to communicate with the system through its Ethernet interface. It is recommended that this command be used only from the serial console port. When used through an interface other than the serial console port, the command displays a warning message and prompts for verification before continuing. This warning is not displayed and you are not prompted when the command is used through the serial console port. For dual-CP systems, this command affects only the CP to which you are currently logged in to set the link operating mode on the active CP, you must issue this command on the active CP; to set the link operating mode on the standby CP, you must issue this command on the standby CP. During failover, the link operating mode is retained separately for each CP, because the physical links may be set to operate in different modes. 206 Brocade Fabric OS Command Reference 53-1004112-02