Juniper Networks 6-Ports QSFP+ Line Card Module with 1-slot for MX10003 – MX10003-LC2103

Juniper MX10003-LC2103 6-Port QSFP28 Line Card for MX10003

The Juniper MX10003-LC2103 is a 6-port QSFP28 line card for the Juniper MX10003 Universal Routing Platform, delivering 100GbE interface density for high-scale service provider core and peering deployments requiring dense 100G port capacity within the MX10003 chassis.

Key Features

• 6 x QSFP28 ports supporting 100GbE interfaces per line card slot
• Designed for Juniper MX10003 — high-scale service provider core routing platform
• Supports 100GbE and breakout configurations for flexible interface density
• Full Junos OS feature support including MPLS, segment routing, and L2/L3 VPN
• Hot-plug capable for non-disruptive line card changes in active MX10003 chassis

Product Specifications

• Part Number: MX10003-LC2103
• Manufacturer: Juniper Networks
• Component Type: Line Card Module
• Compatible System: Juniper MX10003
• Ports: 6 x QSFP28 (100GbE)
• Chassis Slots: 1 slot
• Hot-Plug: Yes

Switch & Port Specifications

• Port Speed: 100GbE per QSFP28 port
• Breakout: 4x25GbE breakout per port (via breakout cables)
• Total Capacity: Up to 600 Gbps per line card
• Transceivers: Accepts standard QSFP28 100G optics (SR4, LR4, ER4, CWDM4)

Network & Protocol Specifications

• MPLS: RSVP-TE, LDP, Segment Routing (SR-MPLS, SRv6)
• VPN: L3VPN, L2VPN, EVPN, VPLS
• Multicast: PIM SM/SSM, multicast VPN
• QoS: Hierarchical QoS, traffic engineering
• Management: Junos OS CLI, NETCONF, Juniper Paragon Automation

Use Cases

• 100GbE interface density expansion for Juniper MX10003 service provider core routers
• Internet peering port capacity for MX10003 at IXPs and transit provider interconnects
• MPLS and segment routing core line card for high-scale SP backbone deployments
• 4x25GbE breakout for aggregation of 25GbE server or access connections at scale

Compatibility

• Juniper MX10003 Universal Routing Platform only
• Not compatible with MX240, MX480, or MX960 (different line card form factor)
• Accepts standard QSFP28 100G optical transceivers and DAC cables
• Verify MX10003 Junos OS version for LC2103 line card support

Frequently Asked Questions

What is the difference between MX10003-LC2103 and JNP10003-LC2103?

MX10003-LC2103 and JNP10003-LC2103 are equivalent part numbers for the same line card — Juniper uses both the MX and JNP prefix designations across different ordering and documentation systems. Both refer to the same 6-port QSFP28 line card for the MX10003 chassis.

Can the MX10003-LC2103 ports be broken out to 25GbE?

Yes — each QSFP28 port supports 4x25GbE breakout using QSFP28 to 4xSFP28 breakout cables, enabling up to 24 x 25GbE connections per line card for aggregation applications.

How many LC2103 line cards does the MX10003 chassis support?

The MX10003 chassis supports up to 3 line card slots. With three MX10003-LC2103 cards installed, the chassis provides up to 18 x 100GbE ports and 1.8 Tbps of interface capacity.

The Juniper MX10003-LC2103 maximizes 100GbE port density in the MX10003 Universal Routing Platform — providing 6 x QSFP28 interfaces per slot with full Junos MPLS, segment routing, and VPN feature support for service provider core routing, peering, and high-scale backbone deployments.