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Configuring Gigabit Ethernet Interfaces—Quick Configuration

You can use J-Web Quick Configuration to quickly configure a Gigabit Ethernet interface.

  1. Select Configuration > Quick Configuration > Interfaces. The properties you can configure on a Gigabit Ethernet interface appear as shown in Figure 14.

    Figure 14: Gigabit Ethernet Interface Quick Configuration

    Gigabit Ethernet Interface Quick

  2. Fill in the information as described in Table 91.
  3. Click one of the following buttons:
  4. To verify that the Gigabit Ethernet interface is configured correctly, see the JUNOS Enhanced Services Interfaces and Routing Configuration Guide.

Table 91: Gigabit Ethernet Quick Configuration Page Summary




Logical Interfaces

Add logical interfaces

Defines one or more logical units that you connect to this physical Gigabit Ethernet interface. You must define at least one logical unit for a Gigabit Ethernet interface.

Click Add.

Logical Interface Description

(Optional) Describes the logical interface.

Type a text description of the logical interface to more clearly identify it in monitoring displays.

IPv4 Addresses and Prefixes

Specifies one or more IPv4 addresses for the interface.

  1. Type one or more IPv4 addresses and prefixes. For example:

  2. Click Add.
  3. Click OK.

To delete an IP address and prefix, select them in the Source Addresses and Prefixes box, then click Delete.

ARP Address

Enables the router to create a static Address Resolution Protocol (ARP) entry for this interface by specifying the IP address of a node to associate with its media access control (MAC) address. The IP address must be in the same subnet as the IPv4 address or prefix of the interface you are configuring.

Static ARP entries associate the IP addresses and MAC addresses of nodes on the same subnet, enabling a Services Router to respond to ARP requests having destination addresses that are not local to the incoming interface.

Type an IPv4 address that you want to associate with the MAC address—for example,

MAC Address

Specifies the hardware media access control (MAC) address associated with the ARP address.

The MAC address uniquely identifies the system and is expressed in the following format: mm:mm:mm:ss:ss:ss. The first three octets denote the hardware manufacturer ID, and the last three are serial numbers identifying the router.

Type the MAC address to be mapped to the ARP entry—for example, 00:12:1E:A9:8A:80.


Enables the router to reply to ARP requests for the specified address.

  • To enable publishing, select the check box.
  • To disable publishing, clear the check box.

Physical Interface Description

(Optional) Adds supplementary information about the physical Gigabit Ethernet interface.

Type a text description of the Gigabit Ethernet interface to more clearly identify it in monitoring displays.

MTU (bytes)

Specifies the maximum transmission unit size for the Gigabit Ethernet interface.

Type a value between 256 and 9014 bytes. The default MTU for Gigabit Ethernet interfaces is 1514.

Per unit scheduler

Enables scheduling on logical interfaces.

Allows you to configure multiple output queues on a logical interface and associate an output scheduler and shaping rate with the queues.

  • To enable scheduling, select the check box.
  • To disable scheduling, clear the check box.
Gigabit Ethernet Options


Enables or disables the loopback option.

Select Yes to enable the loopback diagnostic option, or select No to disable the loopback option. By default, loopback is disabled.

Auto Negotiation

Enables or disables autonegotiation.

By default, Gigabit Ethernet interfaces autonegotiate the link mode and speed settings. If you disable autonegotiation and do not manually configure link mode and speed, the link is negotiated at 1000 Mbps, full duplex.

When you configure both the link mode and the speed, the link negotiates with the manually configured settings whether autonegotiation is enabled or disabled.

Select Yes to enable autonegotiation, or select No to disable it. By default, autonegotiation is enabled.

Auto Negotiation Remote Fault

Indicates the autonegotiation remote fault value.

Select the autonegotation remote fault value from the list of options given. This field is enabled only if autonegotiation is enabled.

Source MAC Address Filters

Displays the list of media access control (MAC) addresses from which you want to receive packets on this interface.

To add MAC addresses, type them in the boxes above the Add button, then click Add.

To delete a MAC address, select it in the Source Addresses box, then click Delete.

Note: You can also manually set the speed and link mode for built-in and copper PIM Gigabit Ethernet interfaces on J4350 and J6350 routers using the CLI commands set interfaces ge-pim/0/port speed 10m | 100m | 1000m and set interfaces ge-pim/0/port link-mode half-duplex | full-duplex. (You cannot manually configure speed and link mode on SFP Gigabit Ethernet PIMs.) You must configure both link mode and speed—if you configure only one or the other, the system ignores the configuration and generates a system log message.

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