Juniper RE-S-X6-128G Routing Engine — 6-Core 2.0GHz, 128GB for MX240 / MX480 / MX960

The Juniper RE-S-X6-128G is a 6-core 2.0GHz Routing Engine with 128GB DRAM for the Juniper MX240, MX480, and MX960 Universal Routing Platforms — delivering high-performance control plane processing, full Internet routing table capacity, and enhanced Junos OS execution for large-scale service provider and enterprise core routing deployments.

Key Features

• 6-core 2.0GHz processor for high-performance Junos OS and routing protocol execution
• 128GB DRAM for large routing tables, extensive BGP policy, and advanced Junos features
• Supports full Internet routing table (2M+ IPv4 routes) with headroom for growth
• Dual-RE support for NSR and GRES hitless failover on MX240, MX480, and MX960
• Compatible with MX240, MX480, and MX960 — single RE serves all three platforms

Product Specifications

• Part Number: RE-S-X6-128G
• Manufacturer: Juniper Networks
• Component Type: Routing Engine
• Compatible Systems: Juniper MX240, MX480, MX960
• CPU: 6-core x86 at 2.0GHz
• Memory: 128GB DRAM
• OS: Junos OS

Component Specifications

• Routing Table: Supports 2M+ IPv4 routes and 1M+ IPv6 routes
• Storage: M.2 SSD (replaceable — see JNP-SSD-M2-800GB)
• Management Ports: Console + out-of-band Ethernet management
• High Availability: NSR, GRES, ISSU (In-Service Software Upgrade)
• Protocols: BGP, OSPF v2/v3, IS-IS, RSVP, LDP, MPLS, BFD, PIM

Use Cases

• High-scale service provider MX240/MX480/MX960 deployments with full Internet BGP tables
• Dual-RE MX configuration for non-stop routing and in-service software upgrades
• Replacing lower-memory RE variants to support growing routing table and Junos feature requirements
• Enterprise core routing on MX240/MX480/MX960 requiring large DRAM for advanced policy

Compatibility

• Juniper MX240, MX480, and MX960 Universal Routing Platforms
• Not compatible with MX104, MX150, or MX10003 (platform-specific RE form factors)
• M.2 SSD replaceable — JNP-SSD-M2-800GB recommended for storage expansion
• Verify MX chassis Junos OS version for RE-S-X6-128G support before installation

Frequently Asked Questions

What is the advantage of 128GB DRAM over lower-memory MX Routing Engines?

128GB DRAM allows the RE-S-X6-128G to maintain larger routing tables, more extensive BGP RIB/FIB entries, and complex Junos policy configurations simultaneously — critical for service providers with full Internet tables, multiple peer tables, and advanced traffic engineering policies running concurrently.

Does the RE-S-X6-128G support In-Service Software Upgrade (ISSU)?

Yes — with dual RE-S-X6-128G modules installed in a supported MX chassis, ISSU enables Junos OS upgrades without forwarding interruption, provided both REs are running compatible Junos versions and the chassis supports ISSU for the installed MPC line cards.

Is the RE-S-X6-128G backward compatible with older MX240/MX480/MX960 chassis?

Compatibility depends on the MX chassis hardware version and Junos OS level. Juniper recommends verifying the chassis hardware compatibility matrix and minimum supported Junos version for RE-S-X6-128G before installation in an existing MX deployment.

The Juniper RE-S-X6-128G sets the standard for MX-series control plane performance — combining a 6-core 2.0GHz processor with 128GB DRAM to handle full Internet routing tables, advanced Junos policy, and dual-RE hitless failover for the most demanding service provider and enterprise core routing deployments on MX240, MX480, and MX960.