Is the Juniper QFX5100 end of life?

Yes. Juniper's QFX Series hardware milestones page gives two sets of dates for the models on this page. QFX5100-48S, 48T and 24Q models: end of life announced 30 April 2021, last order 1 July 2022, end of support 1 July 2027. QFX5100-96S models: announced 25 May 2022, last order 31 December 2022, end of support 31 December 2027.

What is the difference between AFO and AFI on a QFX5100?

Airflow direction. Air Out (AFO) draws air in at the port side and exhausts it past the power supplies and fans; Air In (AFI) runs the other way, from the power supply and fan side to the ports. Juniper notes that older switches called these front-to-back and back-to-front. Pick the direction that matches your hot and cold aisles; mixing directions in one chassis is not supported.

What is the difference between the QFX5100-48S and the QFX5100-48T?

The 48S has 48 SFP+ ports for 10GbE optics or direct attach cables. The 48T has 48 10GBASE-T copper RJ-45 ports. Both have six 40GbE QSFP+ ports.

Can QFX5100 switches be stacked or built into a fabric?

Yes. Up to ten QFX5100 switches form a QFX Virtual Chassis managed as one device. A Virtual Chassis Fabric scales to 20 devices in a spine and leaf design, with up to four QFX5100 spines, and EX4300 switches can join as leaf devices.

What condition and warranty come with a Juniper QFX5100 switch from Townsend?

Each listing prints its own condition. Units sold as new, refurbished or used are bench tested before they are listed: every port and module slot is checked and the previous owner's configuration is erased. They are covered by the Townsend warranty from the date of delivery; if the hardware fails in normal use we repair it or replace it with a tested unit, and the length and terms are on our warranty page. Unused hardware can be returned within 30 days of delivery. Juniper software licences and support contracts are not part of our warranty.

QFX5100-48S-3AFO Juniper Switch, Front-to-Back, Refurbished, 48x 1/10GbE SFP+ and 6x 40GbE QSFP+

Condition: Refurbished, tested & guaranteed
WARRANTY & RETURNS: QFX5100-48S-3AFO has a 3-year warranty and a 30-day return policy. DOA units are replaced or refunded. Full terms are on the warranty page and the refund policy.
Availability: In stock

Orders placed by 12pm ship the same day.

A firm price comes back, typically the same business day. Prefer a PO or wire? We take those too. Just ask.

The Juniper QFX5100-48S-3AFO is a switch from the Juniper QFX5100 family with 48 ports of 1/10GbE SFP+, 6 ports of 40GbE QSFP+, front-to-back airflow and AC power. It is a Layer 3 managed platform that runs Junos OS. This unit is refurbished (used): inspected, powered on and functionally tested by Townsend Networks technicians before listing. One switch per order, with a rack-mount kit and the power cable(s) to match.

Compatible with: Air Out parts: the AC power supply JPSU-650W-AC-AFO, which has a gold handle, and the fan module QFX5100-FAN-AFO, labeled AIR OUT and colored Juniper Gold. Airflow in and airflow out fans and power supplies cannot be mixed in one chassis, and AC and DC supplies cannot be mixed either. Converting an AIR OUT switch to AIR IN means replacing all the fans and power supplies at one time.
HOW IT DIFFERS: QFX5100-48S-3AFO is the front-to-back airflow 48S with three management ports: Juniper's hardware guide lists it as 48 SFP+ and 6 QSFP+ with AC supplies, Air Out (ports to FRUs) and 3 management ports, where QFX5100-48S-AFO has 2. The datasheet words it as 48 SFP+/SFP ports, 6 QSFP+ ports and dual SFP/RJ-45 management ports with redundant fans and redundant AC power supplies. Its sister QFX5100-48S-AFO is ordered without those words, on the same JPSU-650W-AC-AFO supplies, and the 48S weighs 21.8 lb.

Model: QFX5100-48S-3AFO
Network Ports: 48 × 1/10GbE
Connectors: SFP+, QSFP+
Type: Switch
Condition: Refurbished, tested & guaranteed

Technical details

Brand	Juniper
Family	QFX5100
Uplinks	6x 40GbE QSFP+
Total ports	54
Fastest port	40GbE
Management ports	2: 1 RJ-45 and 1 SFP
Layer	Layer 3 (managed)
Operating system	Junos OS
Rack units	1 U
Airflow	Front-to-back (AFO)
Power input	AC
Throughput	1.44 Tbps / 1.08 Bpps
Dimensions	1.72 x17.36 x 20.48 in (4.37 x 44.09 x 52.02 cm)
Weight	21.8 lb (9.9 kg)
Mounting	four post mounting for 19-in server rack or datacom rack
Fans	Redundant and hot-pluggable fan modules
Power supplies	Dual redundant and hot-pluggable
Input voltage	110-240 V single phase AC power
Operating temperature	32° to 104° F (0° to 40° C)
Storage temperature	-40° to 158° F (-40° to 70° C)
Operating humidity	5% to 90% (noncondensing)
Operating altitude	up to 2,000 (610 m)
CPU	1.5 GHz dual-core Intel CPU
Memory (DRAM)	8 GB
Flash storage	32 GB SSD storage
MAC addresses	288,000
IPv4 routes	128,000 prefixes; 208,000 host routes
IPv6 routes	64,000 prefixes
VLANs	4,096 VLAN IDs
Jumbo frames	9,216 bytes
Packet buffer	12 MB shared
Latency	as low as 550 ns
Stacking	Virtual Chassis, up to 10 interconnected switches
Certifications	FCC 47CFR Part 15 Class A (2009); EN 55022 Class A (2006); UL 60950-1 (2nd Ed.)

Juniper datasheet

Testing process

End of sale and support

Model	Announced	End of sale	End of support	Notice
Juniper QFX5100 (24Q, 48S, 48T)	2021-04-30	2022-07-01	2027-07-01	Juniper notice

Questions about the Juniper QFX5100 family

Is the Juniper QFX5100 end of life?: Yes. Juniper's QFX Series hardware milestones page gives two sets of dates for the models on this page. QFX5100-48S, 48T and 24Q models: end of life announced 30 April 2021, last order 1 July 2022, end of support 1 July 2027. QFX5100-96S models: announced 25 May 2022, last order 31 December 2022, end of support 31 December 2027.
What is the difference between AFO and AFI on a QFX5100?: Airflow direction. Air Out (AFO) draws air in at the port side and exhausts it past the power supplies and fans; Air In (AFI) runs the other way, from the power supply and fan side to the ports. Juniper notes that older switches called these front-to-back and back-to-front. Pick the direction that matches your hot and cold aisles; mixing directions in one chassis is not supported.
What is the difference between the QFX5100-48S and the QFX5100-48T?: The 48S has 48 SFP+ ports for 10GbE optics or direct attach cables. The 48T has 48 10GBASE-T copper RJ-45 ports. Both have six 40GbE QSFP+ ports.
Can QFX5100 switches be stacked or built into a fabric?: Yes. Up to ten QFX5100 switches form a QFX Virtual Chassis managed as one device. A Virtual Chassis Fabric scales to 20 devices in a spine and leaf design, with up to four QFX5100 spines, and EX4300 switches can join as leaf devices.
What condition and warranty come with a Juniper QFX5100 switch from Townsend?: Each listing prints its own condition. Units sold as new, refurbished or used are bench tested before they are listed: every port and module slot is checked and the previous owner's configuration is erased. They are covered by the Townsend warranty from the date of delivery; if the hardware fails in normal use we repair it or replace it with a tested unit, and the length and terms are on our warranty page. Unused hardware can be returned within 30 days of delivery. Juniper software licences and support contracts are not part of our warranty.

QFX5100-48S-3AFO 48x 10GB SFP+ 6x 40GB QSFP+ F-B Airflow Switch

WHAT'S INCLUDED

One (1) Juniper QFX5100-48S-3AFO. Includes a rack-mount kit and the power cable(s) to match the switch.

CONDITION & TESTING

Condition: Refurbished, Tested & Guaranteed QFX5100-48S-3AFO was tested by Townsend Networks technicians before listing. The test process is on the testing process.