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-D-3AFI Juniper Switch, Back-to-Front, Used, 48x 1/10GbE SFP+ and 6x 40GbE QSFP+

Condition: Used, tested & guaranteed
WARRANTY & RETURNS: QFX5100-48S-D-3AFI 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

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-D-3AFI is a switch from the Juniper QFX5100 family with 48 ports of 1/10GbE SFP+, 6 ports of 40GbE QSFP+, back-to-front airflow and DC power. It is a Layer 3 managed platform that runs Junos OS. This unit is 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.

HOW IT DIFFERS: QFX5100-48S-D-3AFI has 48 SFP+/SFP ports and 6 QSFP+ ports, dual SFP/RJ-45 management ports and redundant DC power supplies, with back-to-front airflow. Its sister QFX5100-48T-DC-AFI is also DC and back-to-front, but its 48 ports are 100M/1G/10G RJ-45 copper, with 6 QSFP ports, and Juniper's datasheet gives it a heavier chassis at 24.8 lb against 21.8 lb here.

Model: QFX5100-48S-D-3AFI
Network Ports: 48 × 1/10GbE
Connectors: SFP+, QSFP+
Type: Switch
Condition: Used, 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	Back-to-front (AFI)
Power input	DC
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	redundant DC power supplies; dual redundant, hot-pluggable
Input voltage	-36 to -72 V DC 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
Switching capacity	1.44 Tbps
Forwarding rate	1.08 Bpps
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

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-D-3AFI 48x 10GB SFP+ 6x 40GB QSFP+ B-F Airflow (DC) Switch

WHAT'S INCLUDED

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

CONDITION & TESTING

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