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play_arrow Fast Track: Initial Installation
- Fast Track to Rack Installation and Power
- Onboard, Configure, and Monitor MX304
play_arrow Overview
play_arrow Site Planning, Preparation, and Specifications
play_arrow Initial Installation and Configuration
play_arrow Maintaining Components
play_arrow Contacting Customer Support and Returning the Chassis or Components
- Contact Customer Support and Returning the Chassis or Components
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MX304 Line-card MICs (LMICs)

date_range 14-Apr-25

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MX304 LMIC (FRU)

Figure 1: MX304-LMIC16-BASE

Description	Weight: 6.17 lb (2.8 kg). Model number: MX304-LMIC16-BASE. Power requirement: Approximately 410 W at 46°C, with 16x100GbE ports with each transceiver at 5 W each. Approximately 386 W at 25°C, with 16x100GbE ports with each transceiver at 5 W each. Name in the CLI: (Junos OS 24.4R1 and later) `Slot 0: MIC 0/PIC 0, MIC 1/PIC 1` (MRATE LC-MIC 16x100G/4x400G). (Junos OS releases earlier than 24.4R1) `Slot 0: PIC 0, PIC 1` (MRATE LC-MIC 16x100G/4x400G).
Hardware features	Support maximum data throughput of 1.6 TB ingress and 1.6 TB egress. It has a single YT ASIC which internally has two slices of 800 Gbps Packet Forwarding Engines. Supports 400GbE and 100GbE interface speeds. Supports a mix of 100GbE and 400GbE transceivers. 1588 Class-c support. Supports MACsec on all 16 ports.
Software features	Flexible PIC/Port mode configuration for 400G/100G/40G/10G speeds. Supports Routing Engine redundancy. FIPS certified Platform Dynamic Power Management for effective utilization of available power. Inline Active Flow Monitoring for higher scalability and performance. Flexible Queuing Mode to supports up to 128,000 queues per LMIC or 384,000 queues per system. Hyper Mode to speed up packet processing. Supports Agile licensing model. Optical diagnostics and related alarms.
Cables and connectors	Tip: See the Hardware Compatibility Tool for information about the pluggable transceivers for your Juniper Networks device.

Table 1 summarizes the port speed capability of MX304 LMICs. Figure 2 shows the ports that support 4x400GbE.

Table 1: MX304 LMIC (Multi-Rate) Port Speed
LMIC	Port Number	Port Speed Supported
(Junos OS 24.4R1 and later) MIC 0/PIC 0 (Junos OS releases earlier than 24.4R1) PIC 0	0-15	16X100GbE. 4x400GbE on ports 0, 6, 8, and 14. Note: Ports 0, 2, 4, 6, 8, 10, 12 and 14 support 100G optics upto 11 W, and ports 1, 3, 5, 7, 9, 11, 13 and 15 support 100G optics upto 6 W. Only ports 1, 3, 5, 7, 9, 11, 13 and 15 support 4x1G, 40G, 4x10G, and 4x25G operation.
(Junos OS 24.4R1 and later) MIC 1/PIC 1 (Junos OS releases earlier than 24.4R1) PIC 1	0-15	16X100GbE. 4x400GbE on ports 0, 6, 8, and 14. Note: Ports 0, 2, 4, 6, 8, 10, 12 and 14 support 100G optics upto 11 W, and ports 1, 3, 5, 7, 9, 11, 13 and 15 support 100G optics upto 6 W. Only ports 1, 3, 5, 7, 9, 11, 13 and 15 support 4x1G, 40G, 4x10G, and 4x25G operation.
(Junos OS 24.4R1 and later) MIC 2/PIC 2 (Junos OS releases earlier than 24.4R1) PIC 2	0-15	16X100GbE. 4x400GbE on ports 0, 6, 8, and 14. Note: Ports 0, 2, 4, 6, 8, 10, 12 and 14 support 100G optics upto 11 W, and ports 1, 3, 5, 7, 9, 11, 13 and 15 support 100G optics upto 6 W. Only ports 1, 3, 5, 7, 9, 11, 13 and 15 support 4x1G, 40G, 4x10G, and 4x25G operation.

Figure 2: MX304 LMIC (Multi-Rate) Port Speed

MX304 Port and Interface Numbering

In the physical part of the interface name, a hyphen (-) separates the media type from the MPC number (represented as an FPC in the CLI), and a slash (/) separates the logical PIC and port numbers:

type-fpc/pic/port

type—Media type, which identifies the network device. For example:
- xe—10GbE interface
- et—100GbE interfaces (40GbE, 100GbE, 400GbE )
fpc—The CLI displays FPC 0 for all the LMICs.
(Junos OS 24.4R1 and later) mic/pic—Logical PIC on the LMIC.

(Junos OS releases earlier than 24.4R1) pic—Logical PIC on the LMIC.
port—Port number.

MX304 LMIC LEDs

Table 2 describes the link LEDs on the MX304 LMIC (multi-rate) front panel.

Table 2: MX304 LMIC LEDs
LED Status	Color	State	Description
OK/FAIL	Green	On steadily	LMIC is functioning normally, and the link is up.
	Red	-	LMIC has failed.
	Amber/Blinking		LMIC is transitioning.
	Off		LMIC is plugged-in but not powered on.
OFFLINE	Off	-	LMIC is offline.

Note:

Starting with Junos OS 24.4R1 and later, along with checking the LMIC’s LED status indicators, use the show chassis fpc mic-status command to verify the LMIC online or offline status before the LMIC insertion or removal process.

MX304 LMIC Port LEDs

Table 3 describes the link LEDs for the LMIC ports on the MX304 front panel.

Table 3: LMIC Port LEDs
Color	State	Description
Green	On steadily	No breakout, port is up. Breakout, all lanes in that port are up.
Red	On steadily	Optics transceiver hardware failure.
Amber	On steadily	Any other fault except LOS and transceiver hardware failure.
Off		Pluggable not inserted. No breakout; Loss of signal detected. Breakout; Loss of signal on all lanes.

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MX304 Universal Routing Platform Hardware Guide

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MX304 Line-card MICs (LMICs)

MX304 LMIC (FRU)

MX304 Port and Interface Numbering

MX304 LMIC LEDs

MX304 LMIC Port LEDs

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