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Configuring Gigabit and 10-Gigabit Ethernet Interfaces for EX4600 and QFX Series Switches

 

Devices include a factory default configuration that:

  • Enables all 10-Gigabit Ethernet network interfaces on the switch

  • Sets a default port mode (access)

  • Sets default link settings

  • Specifies a logical unit (unit 0) and assigns it to family ethernet-switching

  • Configures Storm Control on all 10-Gigabit Ethernet network interfaces

  • Provides basic Rapid Spanning Tree Protocol (RSTP) and Link Layer Discovery Protocol (LLDP) configuration

The ether-options statement enables you to modify the following options:

  • 802.3ad—Specify an aggregated Ethernet bundle for both Gigabit Ethernet and 10-Gigabit Ethernet interfaces.

  • autonegotiation—Enable or disable autonegotation of flow control, link mode, and speed for interfaces.

  • link-mode—Specify full-duplex, half-duplex, or automatic for Gigabit Ethernet interfaces.

  • loopback—Enable or disable a loopback interface for both Gigabit Ethernet and 10-Gigabit Ethernet interfaces.

To set ether-options for both Gigabit Ethernet and 10-Gigabit Ethernet interfaces:

[edit]

user@switch# set interfaces interface-name ether-options

This topic describes:

Configuring Port Mode on QFX5100-48S, QFX5100-48T, QFX5100-24Q, and EX4600 Switches

If you are connecting a switch to other switches and to routers on the LAN, you need to assign the interface to a logical port and you need to configure the logical port as a trunk port.

To configure a Gigabit Ethernet or 10-Gigabit interface for trunk port mode on the Enhanced Layer 2 software (ELS):

[edit]

user@switch# set interfaces interface-name unit logical-unit-number family ethernet-switching interface-mode trunk

Devices include a factory default configuration that enables Gigabit Ethernet interfaces with applicable link settings.

The following default configurations are available on Gigabit Ethernet interfaces:

  • You cannot set the speed on these interfaces.

    On QFX5100-48S and QFX5100-96S devices using 1-Gigabit Ethernet SFP interfaces, the speed is set to 1 Gbps by default and cannot be configured to operate in a different speed.

  • On QFX5100 devices, the interface naming for Gigabit Ethernet interfaces changes automatically to xe-0/0/0, ge-0/0/0, or et-0/0/0 when the appropriate SFP is inserted.

  • Gigabit Ethernet interfaces operate in full-duplex mode.

  • Autonegotiation is supported by default. Autonegotiation is enabled by default, and will autonegotiate the speed with the link partner. We recommend that you keep autonegotiation enabled for interfaces operating at 100M and 1G. By default, autonegotiation is disabled on 10-Gigabit fiber ports.

    If for some reason you have disabled autonegotiation, you can enable it by issuing the set interfaces name ether-options auto-negotiate command.

    To disable autonegotiation, issue the delete interfaces name ether-options auto-negotiate command.

    Note

    Do not use the set interfaces name ether-options no-auto-negoatiate command to remove the autonegotiation configuration.

    Issue the show interfaces name extensive command to see if autonegotiation is enabled or disabled and the negotiated speed of the interface.

Configuring Gigabit Ethernet Interfaces on QFX5100-48T Switches

Devices include a factory default configuration that enables Gigabit Ethernet interfaces with applicable link settings.

The following default configurations are available on Gigabit Ethernet interfaces:

  • Gigabit Ethernet interfaces operate in full-duplex mode.

  • Gigabit Ethernet interfaces must be configured as xe-fpc/pic/port, and not ge-fpc/pic/port.

  • Autonegotiation is enabled by default, and will autonegotiate the speed with the link partner. We recommend that you keep autonegotiation enabled for interfaces operating at 1G and 10G. By default, autonegotiation is enabled on 10-Gigabit Ethernet Copper interfaces.

    To disable autonegotiation, issue the delete interfaces name ether-options auto-negotiate command. Note that you can not disable auto-negotiation on 1-Gigabit Ethernet ports. It is mandatory to enable autonegotiation when 1-Gbps speed is configured on a particular interface.

    Note

    Do not use the set interfaces name ether-options no-auto-negotiate command to remove the autonegotiation configuration.

    You can reenable autonegotation it by issuing the set interfaces name ether-options auto-negotiate command.

    Issue the show interfaces name extensive command to see if autonegotiation is enabled or disabled and the negotiated speed of the interface.

  • For a port to start with a specific speed, it is mandatory that both the auto-negotiation must be enabled and interface must be configured with a particular speed. Otherwise, the switch will remain with the last negotiated speed.

The following default configurations are available on 10-Gigabit Ethernet interfaces:

  • All the 10-Gigabit Ethernet interfaces are set to auto-negotiation.

  • Flow control for 10-Gigabit Ethernet interfaces is set to enabled by default. You can disable flow control by specifying the no-flow-control option.

  • The speed cannot be configured.

    On QFX5100-48S, QFX5100-96S, and QFX5100-24Q devices using 10-Gigabit Ethernet SFP interfaces, the speed is set to 10 Gbps by default and cannot be configured to operate in a different speed.

  • On QFX5100 devices, the interface naming for Gigabit Ethernet interfaces changes automatically to xe-0/0/0, ge-0/0/0, or et-0/0/0 when the appropriate SFP is inserted.

  • 10-Gigabit Ethernet interfaces operate in full-duplex mode by default.

  • Autonegotiation is enabled by default, and will autonegotiate the speed with the link partner. We recommend that you keep autonegotiation enabled for interfaces operating at 100M and 1G. By default, autonegotiation is disabled on 10-Gigabit fiber ports.

    If for some reason you have disabled autonegotiation, you can enable it by issuing the set interfaces name ether-options auto-negotiate command.

    To disable autonegotiation, issue the delete interfaces name ether-options auto-negotiate command.

    Note

    Do not use the set interfaces name ether-options no-auto-negoatiate command to remove the autonegotiation configuration.

    Issue the show interfaces name extensive command to see if autonegotiation is enabled or disabled and the negotiated speed of the interface.

The following default configurations are available on 10-Gigabit Ethernet interfaces:

  • All the 10-Gigabit Ethernet interfaces are set to auto-negotiation.

  • Flow control for 10-Gigabit Ethernet interfaces is set to enabled by default. You can disable flow control by specifying the no-flow-control option.

  • 10-Gigabit Ethernet interfaces operate in full-duplex mode by default.

  • Autonegotiation is enabled by default, and will autonegotiate the speed with the link partner. We recommend that you keep autonegotiation enabled for interfaces operating at 1G and 10G.

    Note

    On QFX5100-48T-6Q switches, autonegotiation is not supported for 100-Mbps speed.

    If for some reason you have disabled autonegotiation, you can enable it by issuing the set interfaces name ether-options auto-negotiate command.

    Issue the show interfaces name extensive command to see if autonegotiation is enabled or disabled and the negotiated speed of the interface.

Configuring the IP Options on QFX5100-48S, QFX5100-48T, QFX5100-24Q, and EX4600 Switches

To specify an IP address for the logical unit:

[edit]

user@switch# set interfaces interface-name unit logical-unit-number family inet address ip-address