Juniper MX204 End-of-Life: Upgrade Path and Replacement Options

Last updated: October 2026

Key facts

• End of life: Juniper announced the end of life of the MX204 in June 2026.
• Last order date: June 15, 2027.
• End of support: June 30, 2032.
• Replacements: the 1U MX301 and the 2U modular MX304, or the Arista and Nokia alternatives described below.
• Availability: new units can be ordered until the last order date. After that, refurbished MX204 units are the only source.

Why the MX204 became so popular

Released in late 2017, the Juniper MX204 has been a favourite of the MX lineup. As Juniper made lateral moves from the MX80 to the MX104, the MX204 was a huge shift in design to provide larger memory and built in 100G QSFP28 ports. With news of the end-of-life announcement, many Juniper devotees are left wondering why Juniper ended the MX204, and what does the upgrade or replacement path look like from here.

At the time of the MX204 (now MX204-HW-BASE) release, Juniper’s MX lineup was focused on the larger chassis-based solutions with the MX240, MX480 and MX960, augmented by smaller units such as the MX80-AC, down to the MX5-T-AC. In the mid 2010’s as network architects adjusted to the changing landscape in datacenter space, power, and cooling options, Juniper’s lineup appeared to be lacking in the small to mid-sized routing options when compared to other vendors like Nokia (7750 SR-1) or Arista (DCS-7280SR-48C6-R).

Juniper answered the call with the MX204, a 1U, dual powered, 32G memory, fixed configuration router with up to 400Gbps throughput via 4x100G QSFP28 and 8x10G SFP+ interfaces. In order to replace the aging 10G SFP+ and XFP based MX80, the comparatively affordable MX204 brought 100G to the edge by touting the benefits of Juniper’s highly capable in-house Trio 4 silicon.

Small to mid-sized ISPs and carriers deployed the MX204 as a customer edge box; the powerful “starter kit” fit perfectly for smaller point of presence builds in a “CPE” type role, as well as a small aggregation device for sub-10G consumers when used alongside QFX5100, EX4300, or EX3300 switches. With the rich MX and Junos feature set provided by the Trio 4, small footprint, low cost and low power consumption, the MX204 represented an affordable cost entry point to 100G. As the popular MX204 fit the bill perfectly for the small to mid-sized router niche, end-users and vendors alike were surprised by Juniper’s end of life announcement.

Why Juniper ended the MX204

To create the potent MX204, Juniper opted to employ the same silicon found in its dense 100G line-cards like the MPC7E-MRATE in order to achieve the high performance and throughput necessary for lightning fast packet pipelines, deep buffers, and high performance lookup tables used in routing and switching. Juniper utilized Micron’s HMC (Hybrid Memory Cube) memory paired with the Trio 4 chipset to achieve this level of performance.

At the time of development, HMC was the highest performance memory available on the market. In a change of plans in 2018, Micron announced that they would discontinue the HMC product in favor of a competing high-throughput memory technology known as HBM (High Bandwidth Memory). Juniper attempted to secure stock and lock in deliveries of future HMC product to ensure the production of its Trio 4 based lineup for several more years, however, supply chain limitations were eventually exacerbated by the Covid 19 pandemic.

As production lessened, Micron was unable to meet Juniper’s chip demand, and the end was clear for any Trio 4 based solutions relying on HMC.  Juniper’s hand was forced to quickly reroute into products now employing a new-generation of Trio 5 and Trio 6 chipsets.

MX204 replacement options

Juniper now offers two successors. The MX301 is a 1U fixed-configuration router with up to 1.6 Tbps throughput, four 400GbE QSFP56-DD ports, six 100GbE QSFP28 ports and sixteen 1/10/25/50GbE SFP ports, with line-rate MACsec on all ports. It comes in two versions: the MX301 with 128 GB of memory and the MX301-M with 64 GB. For most MX204 users, the MX301 is the closest step up: the same 1U footprint with four times the bandwidth. The MX304 is the larger, modular option with up to 4.8 Tbps for aggregation, peering and DCI roles.

The MX204 alternatives described below may still make sense for specific use cases.

Juniper has announced several replacement alternatives for the MX204, and depending on the exact use case, the alternative may not be a clear-cut choice. The larger option is the Trio 6 based MX304-BASE, a significantly larger and more capable 2U, modular box that provides dual routing engines (JNP304-RE) and up to 4.8Tbps of throughput via the MX304-LMIC16-BASE line card that allows for up to 48x100G QSFP-DD breakout or 12x400G QSFP-DD. As the MX204 once leap-frogged the MX80, the MX304-BASE provides customers a perfect fit  and logical upgrade path for years of bandwidth increases and additional network demands.

Nevertheless, for networks building out micro-footprint, low cost points of presence with only one or two anchor customers, the added entry cost of the MX304-BASE (at launch roughly 3 x the MX204-AC) may be a hard pill to swallow, no matter the savings on price per 100G port. Juniper also lists several alternatives beyond the MX301 and MX304, each with trade-offs:

• ACX7100 - the ACX series generally feature less FIB which makes them relatively unsuitable for BGP edge/peering; potentially significantly more expensive than MX204
• ACX7024 - as with the ACX7100, the ACX series generally feature less FIB which makes them relatively unsuitable for BGP edge/peering; slightly less throughput than MX204 (360Gbps vs. 400Gbps)
• PTX10K - uses the Express chipset, which is less feature-rich than Trio, not ideal for carrier edge where packet manipulation or rich QoS are required; potentially expensive licenses

If the options above do not fit your pricing and requirements, other vendors are worth a look. The closest price/performance ratio to the MX204 may be found in other vendors’ hardware line up - potentially shifting focus to Arista’s advanced line of DCS-7280 routers or Nokia’s 7750 SR1 series. Although the mere idea of adding in a new vendor to the network can bring up unwanted emotions, a well planned device swap can be made with little to no customer impact.

MX204 availability, lead times and buying options

When the MX204 launched, it could be ordered and received in under 30 days. During the supply shortages of 2022, lead times grew to six months for ordering and eight months for delivery, and Arista DCS-7280 routers were quoted at 52 to 60 weeks. Today the MX204 can still be ordered until June 15, 2027. After the last order date, refurbished and secondary-market units will be the only source. Juniper support continues until June 30, 2032, so an MX204 bought today can run in a production network for years.

If you plan to stay with the MX204 for a few more years, buying a spare or an additional unit now is cheaper and faster than a forced migration later. If you plan to move to the MX301, MX304 or another vendor, a well planned swap keeps the impact on your customers close to zero. nesevo also buys back your old MX204 units when you migrate.

Talk to nesevo about your MX204

nesevo is a Juniper partner worldwide. We help you with:

• Buying: MX204 units and spares, and the MX301 and MX304 as successors, see hardware
• Selling: we buy your used MX204 and other network hardware, see IT buyback
• Migration: a planned swap or move to new routers, see data center relocation and installation

Request a quote or ask a question:

US & Canada: sales-us@nesevo.com

EMEA & APAC: sales@nesevo.com

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