Configuring a Gigabit Ethernet Interface
The LN1000 has eight Gigabit Ethernet interfaces that can terminate into a copper or fiber Ethernet PHY device SFP (small form-factor pluggable). Depending on the type of device into which you are terminating these Gigabit Ethernet interfaces, you can configure them to operate in SGMII or 1000Base-X mode. When configured in SGMII mode, you can run ports speeds of 10/100/1000 Mbs in full or half duplex modes. When configured in 1000Base-X mode, you can run these ports in 1000 Mbs mode. Use the mac-mode statement in Chapter 7 to configure these options.
The LN1000-V rear transition module (RTM) supports both copper and fiber SFPs.
- If you are running an LN1000 with the LN1000-V RTM and are using copper SFPs, configure the mac-mode to SGMII.
- If you are running an LN1000 with the LN1000-V RTM and are using fiber SFPs, configure the mac-mode to 1000Base-X.
JUNOS Software uses the following defaults:
- mac-mode set to 1000Base-X
- auto-negotiation set to ON
To add or change mac-mode fields:
If you want to delete mac-mode, use the following command:
If you want to run in a different configuration to match your topology, you can use the existing JUNOS auto-negotiation and link-speed statements and the new mac-mode statement.
To enable or disable autonegotiation, use the following commands:
- Enabling autonegotiation:set interface ge-x/x/x gigether-options autoneg
- Disabling autonegotiationset interface ge-x/x/x gigether-options no-autoneg
The delete interface ge-x/x/x gigether-options autoneg command does not disable autonegotiation. The delete command is not applicable for this option.
To change the mac-mode fields:
Both the speed and link-mode attributes must be modified together in the same configuration commit in order for either change to take effect.
