ALLIED TELESIS 

ALLIED TELESIS AT-X250-18XS-10 10 GIGABIT LAYER 3 LITE STACKABLE SWITCH 18X SFP+ PORTS US

Mfg Part Number:  AT-X250-18XS-10  
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Price: $3,684.03
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Last Updated: Jan 27, 2026
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x250 Series | 10 Gigabit Stackable Edge Switches

Allied Telesis x250 Series 10 Gigabit Layer 3 switches represent a new era of high-speed, high-density edge connectivity. All ports support up to 10G speed for seamless communication to enterprise servers and other 10G terminals, and resilient aggregated connectivity to distribution and core switches.

Overview

Allied Telesis x250 Series switches provide a superior high-speed access solution delivering up to 10G connectivity for next generation networks. The x250 Series fiber models support 1/10G (SFP and SFP+) on all ports, making them ideal for long-distance connections, and for high-capacity devices such as servers. The copper models support 1/2.5/5/10G (Multi-Gigabit) for flexible deployment options and the ability to support all end devices.

The x250 Series can form a virtual chassis stack (VCStackTM ) allowing 2 units, to be managed as a single virtual device for simplicity and flexibility.

Resiliency

Converging network services means increasing demand for highly available networks with minimal downtime. VCStack, in conjunction with link aggregation, provides a network with no single point of failure, and provides access application resiliency.

Ethernet Protection Switched Ring (EPSRing™), and the standards-based G.8032 Ethernet Ring Protection, ensure distributed networks have high- speed access to online resources.

Secure

Network security is guaranteed, with powerful control over network traffic types, secure management options, and multi-layered security features.

Network Access Control (NAC) gives unprecedented control over user access to the network, in order to mitigate threats.

The x250 Series uses 802.1x port- based authentication, in partnership with standards-compliant dynamic VLAN assignment, to assess a user's adherence to network security policies and either grant access or offer remediation. Tri-authentication ensures the network is only accessed by known users and devices. Secure access is also available for guests.

Security from malicious network attacks is provided by features such as DHCP snooping, STP root guard, BPDU protection and access control lists. Each of these can be configured to perform a variety of actions upon detection of a suspected attack.

Network protection

Advanced storm protection features include bandwidth limiting, policy- based storm protection and packet storm protection. Network storms are often caused by cabling errors that result in a loop. The x250 Series loop detection and thrash limiting take immediate action to prevent network storms.

Network storms are often caused by cabling errors that result in a loop. The x250 Series loop detection and thrash limiting take immediate action to prevent network storms.

Manageable

The x250 Series run the advanced AlliedWare Plus™ fully featured operating system, delivering a rich feature set and an industry-standard Command Line Interface (CLI). This reduces training requirements and is consistent across all AlliedWare Plus devices, simplifying network management.

The Device GUI (Graphical User Interface) is an easy-to-use and powerful management tool, with comprehensive monitoring facilities.

Future-proof

x250 Series switches are Software Defined Networking (SDN) ready and able to support OpenFlow v1.3.

Main Specification
General Information
Manufacturer Allied Telesis, Inc
Manufacturer Part Number AT-X250-18XS-10
Manufacturer Website Address http://www.alliedtelesis.com
Brand Name Allied Telesis
Product Series x250
Product Model x250-18XS
Product Name x250-18XS Layer 3 Switch
Product Type Layer 3 Switch
Technical Information
Features Access Control List
Features Plug and Play
Features Active Fiber Monitoring (AFM)
Features DHCP Snooping
Features Loop Protection
High Availability Supported Yes
Interfaces/Ports
Stack Port Yes
Port/Expansion Slot Details 18 x 10 Gigabit Ethernet Expansion Slot
Media & Performance
Media Type Supported Optical Fiber
Ethernet Technology 10 Gigabit Ethernet
Network Technology 10GBase-X
Maximum Data Transfer Rate 1.25 GB/s
I/O Expansions
Total Number of Expansion Slots 18
Expansion Slot Type SFP+
Number of SFP+ Slots 18
Network & Communication
Layer Supported 4
Networking Standards IEEE 802.3z
Networking Standards IEEE 802.1Q
Networking Standards IEEE 802.1AX
Networking Standards IEEE 802.1ag
Networking Standards IEEE 802.3x
Networking Standards IEEE 802.3az
Networking Standards IEEE 802.1v
Networking Standards IEEE 802.1x
Networking Standards IEEE 802.3bz
Networking Standards IEEE 802.1s
Networking Standards IEEE 802.3an
Networking Standards IEEE 802.3ae
Networking Standards IEEE 802.3ad
Networking Standards IEEE 802.1p
Networking Standards IEEE 802.1w
Networking Standards IEEE 802.3ab
Networking Standards IEEE 802.3ac
Networking Standards IEEE 802.1ab
Networking Standards IEEE 802.2
Networking Standards IEEE 802.1ad
Networking Standards IEEE 802.1D
Networking Standards IEEE 802.3
Management & Protocols
Manageable Yes
Data Link Protocols HTTP
Data Link Protocols HTTPS
Power Description
Power Source Power Supply
Number of Power Supplies Supported 1
Number of Power Supplies Installed 1
Power Consumption 70 W
Physical Characteristics
Form Factor Rack-mountable
Height 1.7"
Width 8.3"
Depth 13.6"
Weight (Approximate) 5.95 lb
Miscellaneous
Application/Usage Network
Application/Usage Data Center
Application/Usage Server
Application/Usage Campus
Application/Usage Router
Application/Usage Enterprise
Certifications & Standards
  • UL
  • cUL
  • UL-E
Environmental Compliance China Restriction of Hazardous Substances (China RoHS)
Environmental Compliance Restriction of Hazardous Substances (RoHS)

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WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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