Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8 vs Zyxel XGS1210-12

Researched, not hands-on tested.How we review ›

all judged against network switches at a similar price

The Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8 and Zyxel XGS1210-12 both score 6.9/10 overall.

The Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8 leads on management and port count and uplinks.

The Zyxel XGS1210-12 leads on noise and efficiency.

They score the same on port speeds, poE and firmware and support.

Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8

6.9/10verdict: buy

The UniFi Flex 2.5G USW-Flex-2.5G-8 is for people who run a UniFi setup and want eight 2.5G ports in a small switch. It adds a 10G combo uplink, which suits a link back to a faster switch or router. It is a poor fit for anyone who needs PoE output, a CLI or a standalone web interface.

Typically about £150 in the UK when we researched itSearch Amazon UK

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Zyxel XGS1210-12

6.9/10verdict: buy

The Zyxel XGS1210-12 is for homelabbers and small offices that want a quiet, fanless switch with a couple of faster links. It suits someone connecting a server or NAS over 2.5GbE copper or 10G SFP+ while the other devices stay on Gigabit. It is a poor fit if you need PoE or LACP bonding.

Typically about £125 in the UK when we researched itSearch Amazon UK

Affiliate link. As an Amazon Associate I earn from qualifying purchases. Details

Scores, criterion by criterion

Criterion	Weight	Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8	Zyxel XGS1210-12
Port speeds	30%	8/10	8/10
Management	20%	7/10	6/10
Port count and uplinks	15%	8/10	7/10
Noise and efficiency	15%	6/10	8/10
PoE	10%	5/10	5/10
Firmware and support	10%	5/10	5/10
Overall		6.9/10	6.9/10

Specifications

Spec	Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8	Zyxel XGS1210-12
Ports	8 access ports (2.5G/1G/100M/10M) plus one 10G RJ45/SFP+ combo uplink	12 total: 8 x RJ-45 10/100/1000 Mbps, 2 x RJ-45 100/1000/2500 Mbps, 2 x SFP+
Port speeds	Access ports 2.5G/1G/100M/10M; uplink RJ45 10G/5G/2.5G/1G/100M; SFP+ 10G/1G	8 copper ports 10/100/1000 Mbps; 2 copper ports 100/1000/2.5G; SFP+ cages take 1G or 10G optics
Management	Spec sheet lists management interface as Ethernet only; managed through the UniFi console, and a reviewer of the PoE variant reports no web UI	Web-managed; port-based VLAN, 802.1p and port-based QoS, IGMP snooping, static link aggregation, port mirroring, management VLAN, HTTP/HTTPS
PoE budget	No PoE output; powered by USB-C 5V DC 3A or PoE+ input	No PoE
Uplinks (SFP/SFP+)	One 10G SFP+ port (10G/1G) and one 10 GbE RJ45 port, as a combo uplink	2 x SFP+ (1G/10G)
Switching capacity	60 Gbps switching capacity, 30 Gbps non-blocking throughput, 45 Mpps forwarding rate	66 Gbps switching capacity; 49 Mpps forwarding rate
Cooling	not listed	Fanless

Strengths and weaknesses

Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8

+ Eight 2.5G access ports
+ 10G RJ45/SFP+ combo uplink
+ Small and light, with flexible power options
− No PoE output
− Needs UniFi console; no CLI or SSH reported
− Owners report limited features, no aggregation

Skip it if:

Buyers who need PoE output to power access points or cameras
Admins who want CLI, SSH or a standalone web interface
Anyone who needs link aggregation or several 10G uplinks

Read the full Ubiquiti UniFi Flex 2.5G USW-Flex-2.5G-8 review ›

Zyxel XGS1210-12

+ Two SFP+ cages take 1G or 10G optics
+ Fanless, and owners praise it as quiet and compact
+ Two 2.5GbE copper ports alongside eight Gigabit ports
− Static link aggregation only; no LACP
− Owners report heat under heavy load
− No PoE

Skip it if:

Buyers who need LACP link aggregation
Anyone who needs PoE for access points or cameras
Buyers putting it in a warm, unventilated cupboard under heavy load

Read the full Zyxel XGS1210-12 review ›

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