Understanding the 2-Port 10-Gigabit Ethernet XPIM

The 10-Gigabit Ethernet (also known as 10GBASE-T or IEEE 802.3an) is a telecommunication technology that offers data speeds up to 10 billion bits per second over unshielded or shielded twisted pair cables.

The 2-Port 10-Gigabit Ethernet Physical Interface Module (XPIM) is a 2 x 10GBASE-T / SFP+ XPIM line card. (SFP+ is a fiber optic transceiver module designed for 10-Gigabit Ethernet and 8.5 Gbps-fiber channel systems.) The 2-Port 10-Gigabit Ethernet XPIM provides a front-end interface connection that includes the following ports:

2 X copper ports. The copper ports support 10GBASE-T running with CAT6A or CAT7 Ethernet cable for up to 100 meters.
2 X fiber (SFP+) ports. The fiber ports support SFP+ multiple 10G modules.

The 2-Port 10-Gigabit Ethernet XPIM provides interconnects for LANs, WANs, and metropolitan area networks (MANs). The XPIM provides multiple service levels (1Gigabit Ethernet to 10-Gigabit Ethernet in increments) and a single connection option for a wide range of customer needs and applications.

This topic includes the following sections:

Supported Features
Interface Names and Settings
Copper and Fiber Operating Modes
Link Speeds
Link Settings

Supported Features

The following features are supported on the 2-Port 10-Gigabit Ethernet XPIM:

Multiple SFP+ 10G modules and the following SFP modules:
- SFPP-10GE-SR
- SFPP-10GE-LR
- SFPP-10GE-ER
- SFPP-10GE-LRM
Copper TWIN-AX 1M and Copper TWIN-AX 3M
Online Insertion and Removal (OIR ) functionality
Link speeds of up to 10-Gbps
Full-duplex and half-duplex modes
Flow control
Autonegotiation and autosensing
Quality of service (QoS)

Interface Names and Settings

The following format is used to represent the 2-Port 10-Gigabit Ethernet XPIM interface names:

type-fpc/pic/port

Where:

type — Media type (xe)
fpc — Number of the Flexible PIC Concentrator (FPC) card on which the physical interface is located (6 or 2)
pic — Number of the PIC on which the physical interface is located (0)
port — Specific port on a PIC (0 or 1)

Example: xe-6/0/0 or xe-2/0/0

By default, the interfaces on the ports on the uplink module installed on the device are enabled. You can also specify the maximum transmission unit (MTU) size for the Gigabit Ethernet interface. Junos OS supports values from 256 through 9216. The default MTU for Gigabit Ethernet interfaces is 1514.

Copper and Fiber Operating Modes

On the 2-Port 10-Gigabit Ethernet XPIM, one copper port and one fiber port is grouped together as port 0, and another copper port and fiber port are grouped as port 1. Only two ports can be active at the same time (one port from port 0 and another port from port 1).

The 2-Port 10-Gigabit Ethernet XPIM can be configured to operate in two copper mode, two fiber mode, or mixed mode (one copper and one fiber). In mixed mode, the two ports should be from different port groups (one port from port 1 and the other from port 2).

Link Speeds

The 2-Port 10-Gigabit Ethernet XPIM ports support the following link speeds for copper and fiber:

Copper—10/100/1000 Mbps or 10Gbps (full-duplex). Half duplex is only for 10/100 Mbps.
Fiber—1000 Mbps or 10 Gbps (full-duplex)

To set the link speeds, use the following options:

100m—Sets the link speed to 100 Mbps.
10g—Sets the link speed to 10 Gbps.
10m—Sets the link speed to 10 Mbps.
1g—Sets the link speed to 1 Gbps.

Link Settings

The 2-Port 10-Gigabit Ethernet XPIM includes the following link settings:

802.3ad—Specifies an aggregated Ethernet bundle.
auto-negotiation—Enables autonegotation of flow control, link mode, and speed.
loopback—Enables loopback.
no-auto-negotiation—Disables autonegotation of flow control, link mode, and speed.
no-loopback—Disables loopback.

By default, flow control is enabled on all ports, a link speed of 10 Gbps in full duplex is supported, autonegotation is disabled on the fiber ports, and auto-negotiation is enabled on copper ports.

Note: Auto-negotiation is not supported when the 2-Port 10-Gigabit Ethernet XPIM is operating in fiber mode at a link speed of 10 Gbps.