ZyXEL Communications 24-port GbE Smart Managed Switch - GS1920-24

Item # ZYXGS192024 (Part # GS1920-24)
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Item Description:
GS1920-24 - 24 Port GbE L2 Advanced Web Managed Switch + 4 GbE Combo GbE/SFP (28 Total Ports)

ZyXEL Smart Switch Simplifies Robust Network Management

Today's small and medium-sized businesses (SMBs) expect a higher level of performance from their networks-more connections to support diverse applications; fewer network disruptions; easier management and a greater degree of network security. The ZyXEL GS1920 Series of switches fulfills these expectations with support for 24/48 100/1000BASE-T PoE Plus or non-PoE copper ports; as well as non-blocking performance and high-power budget support to facilitate a greater number of network connections.

The ZyXEL GS1920 Series offers network protection features and comprehensive access management functions to establish a reliable and secure network environment. Easy deployment; smart management and solid security-the GS1920 Series is the best solution for SMB networks.

  • Smart managed switch with essential L2 features
  • GbE RJ-45; GbE combo (RJ-45/SFP) and fixed GbE SFP connectivity
  • Compliant with IEEE 802.3af PoE and 802.3at PoE Plus
  • High 375-watt power budget
  • Supports ZON Utility; Smart Connect and iStacking facilitates easy network initialization and management
  • Reliable network availability with Loop Guard; IPSG; and CPU protection
  • RADIUS; static MAC forwarding and 802.1X authentication-enhance network security
  • Future-proofed with IPv6 support

Advanced Standard Compliance With Intelligent Power Function Support

ZyXEL GS1920 Series PoE switches support 802.3at PoE Plus standards; with a 375-watt high-power budget to meet the connectivity needs of additional powered devices like 802.11ac WLAN access points; VoIP phones and IP cameras. Not only do the GS1920 Series switch PoE models feature full PoE ports; they also employ intelligent technology. While set to Consumption Mode; switches can automatically detect the power consumption status of each powered device and supply only the amount of power required. This intelligent power allocation function minimizes wasteful overpowering of devices; thereby helping businesses save money; while enabling the PoE switch to power more devices.

Zyxel One Network Experience

Aiming for relieving our customers from repetitive operations of deploying andmanaging a network; ZyXEL ONE Network is designed to simplify the configuration; management; and troubleshooting; allowing our customers to focus on the business priorities. ZyXEL ONE Network presents an easy-to-use tool; ZyXEL ONE Network Utility (ZON Utility); to realize speed network setup. ZyXEL Smart Connect allows ZyXEL networking equipment to be aware and recognize each other and further facilitating the network maintenance via one-click remote functions such as factory reset or power cycling. ZyXEL ONE Network redefines the network integration across multiple networking products from switch to Wi-Fi AP and to Gateway.

Robust Network Availability

Network disruptions are a frequent source of headaches for small to medium-sized businesses. Whether outages are caused by internal errors or outside attack; the ZyXEL GS1920 Series protects users from network disruptions and ensures uninterrupted connectivity through several key features. Loop Guard helps networks avoid service disruptions caused by switching loops; and IP Source Guard (IPSG) shields your network from MAC spoof and ARP spoof attacks. Additionally; attacks such as BPDU; ARP and IGMP can target network facilities. However; CPU protection guarantees that a network continues to operate; even while under attack. Furthermore; dual firmware image and configuration features improve network reliability and availability. These are just some of the ways the GS1920 Series switches guarantee headache-free network connectivity for SMBs.

Rigorous Access Protection To Secure The Network

The ZyXEL GS1920 Series provides efficient allocation of network resources while ensuring comprehensive access protection; along with simple and secure network control. Not only does the GS1920 Series support 802.1X authentication with RADIUS; but it can monitor; filter and police all traffic between clients within the same subnet; creating an even higher degree of security.


Port Density

  • Total port count: 28
  • 100/1000 Mbps: 24
  • Gigabit combo (SFP/RJ-45): 4


  • Switching capacity (Gbps): 56
  • Forwarding rate (Mpps): 41.67
  • Packet buffer (Bytes): 1.5 M
  • MAC address table: 16 K

Power Requirement

  • Input voltage of AC: 100 - 240 V AC; 50/60 Hz
  • Maximum power consumption (Watt): 27.2

Physical Specifications

  • Item Dimensions (W x D x H)(mm)(in.): 441 x 131 x 44/17.36 x 5.16 x 1.73
  • Item Weight (kg/lb.): 2.17/4.78
  • Included accessories: Power cord; Rack mounting kit

Green Feature

  • Fanless: Yes

Environmental Specifications

  • Operating temperature: 0 degreeC to 50 degreeC/32 degreeF to 122 degreeF
  • Operating humidity: 10% to 90% (non-condensing)
  • Storage temperature: -40 degreeC to 70 degreeC/-40 degreeF to 158 degreeF
  • Storage humidity: 10% to 95% (non-condensing)
  • MTBF (hr): 211623
  • Heat dissipation (BTU/hr): 92.75

Standard Compliance

  • IEEE 802.3 10BASE-T Ethernet
  • IEEE 802.3u 100BASE-TX Ethernet
  • IEEE 802.3ab 1000BASE-T Ethernet
  • IEEE 802.3z 1000BASE-X
  • IEEE 802.3af PoE
  • IEEE 802.3at PoE Plus
  • IEEE 802.3az EEE
  • IEEE 802.3x flow control
  • IEEE 802.3ad LACP aggregation
  • IEEE 802.1D Spanning Tree Protocol (STP)
  • IEEE 802.1w Rapid Spanning Tree Protocol (RSTP)
  • IEEE 802.1s Multiple Spanning Tree Protocol (MSTP)
  • IEEE 802.1Q VLAN Tagging
  • IEEE 802.1p Class of Service (CoS) Prioritization
  • IEEE 802.1X port authentication

Resilience and Availability

  • IEEE 802.1D Spanning Tree Protocol (STP)
  • IEEE 802.1w Rapid Spanning Tree Protocol(RSTP)
  • IEEE 802.1s Multiple Spanning Tree Protocol(MSTP)
  • IEEE 802.3ad LACP (Max # Trunks/Links per Trunk): 8/8
  • Loop guard
  • ErrDisable recovery
  • MRSTP (ZyXEL Proprietary)
  • Dual configuration files
  • Dual images

Traffic Control

  • 802.1Q static VLANs/dynamic VLANs: 1 K/4 K
  • Port-based VLAN
  • Protocol-based VLAN
  • IP subnet-based VLAN
  • MAC-based VLAN
  • Private VLAN
  • Voice VLAN
  • VLAN ingress filtering
  • LACP algorithm of source/destination IP
  • GVRP
  • L2PT


  • 802.1X
  • Port security
  • Layer 2 MAC filtering
  • Layer 3 IP filtering
  • Layer 4 TCP/UDP socket filtering
  • Static MAC forwarding
  • Multiple RADIUS servers
  • Multiple TACACS+ servers
  • 802.1x VLAN and 802.1p assignment by RADIUS
  • Login authentication by RADIUS
  • Login authentication by TACACS+
  • TACACS+ accounting
  • Authorization on RADIUS
  • Authorization on TACACS+
  • SSL
  • MAC freeze
  • DHCP snooping
  • ARP inspection
  • Static IP-MAC-Port binding
  • Policy-based security filtering
  • Port isolation
  • IP source guard
  • MAC search
  • Guest VLAN
  • ACL packet filtering (IPv4/IPv6)
  • CPU protection
  • Interface related trap enable/disable (by port)

Quality of Service (QoS)

  • No. of hardware queues per port: 8
  • 802.1p queuing method: SPQ; WRR; WFQ
  • Storm control: Broadcast; multicast; unknown unicast (DLF)
  • Port-based rate limiting (ingress/egress)
  • Rate limiting per IP/TCP/UDP per port
  • Policy-based rate limiting
  • 802.3x flow control
  • 802.1p Class of Service (SPQ; WFQ; SPQ/WFQ combination capable)
  • DiffServ (DSCP)

Layer 2 Multicast

  • L2 multicast
  • IGMP snooping (v1; v2; v3)
  • IGMP snooping fast leave
  • Configurable IGMP snooping timer and priority
  • IGMP snooping statistics
  • IGMP throttling
  • MVR support
  • IGMP filtering
  • IGMP snooping immediate leave
  • IGMP proxy mode & snooping mode selection
  • MLD snooping


  • SNMP v1; v2c; v3
  • SNMP trap group
  • RMON (1; 2; 3; 9)
  • ICMP echo/echo reply
  • Syslog
  • IEEE 802.1AB LLDP

IPv6 Management

  • IPv6 over Ethernet (RFC 2464)
  • IPv6 addressing architecture (RFC 4291)
  • Dual stack (RFC 4213)
  • ICMPv6 (RFC 4443)
  • Path MTU (RFC 1981)
  • Minimum path MTU size of 1280 (RFC 5095)
  • Encapsulation for maximum PMTU of 1500
  • Neighbor discovery (RFC 4861)
  • DHCPv6 relay

Device Management

  • ZyXEL iStackingTM
  • Web interface
  • Management through SNMP
  • Remote firmware upgrade by Web
  • Configuration saving and retrieving
  • Configure clone
  • DHCP relay per VLAN
  • DHCP client
  • Daylight saving
  • NTP
  • Port mirroring


  • ZyXEL private common MIB
  • RFC 1066 TCP/IP-based MIB
  • RFC 1213; 1157 SNMPv2c/v3 MIB
  • RFC 1493 bridge MIB
  • RFC 1643 Ethernet MIB
  • RFC 1757 RMON Group 1; 2; 3; 9
  • RFC 2011; 2012; 2013 SNMPv2 MIB
  • RFC 2233 SMIv2 MIB
  • RFC 2358 Ethernet-like MIB
  • RFC 2674 bridge MIB extension
  • RFC 2819; 2925 remote management MIB
  • RFC 3621 power Ethernet MIB
  • RFC 4022 management information base for transmission control protocol
  • RFC 4113 management information base for user datagram protocol
  • RFC 4292 IP forwarding table MIB
  • RFC 4293 Management Information Base (MIB) for IP


  • Safety: LVD; BSMI
  • EMC: FCC Part 15 (Class A); CE EMC (Class A); BSMI EN
  • RoHS: Level A

ZyXEL One Network - ZON Utility

  • Discovery of ZyXEL switches; APs and gateways
  • Centralized and batch configurations; IP configuration; IP renew; Device reboot; Device locating; Web GUI access; Firmware upgrade; Password configuration; One-click quick association with ZyXEL AP Configurator (ZAC)

Smart Connect

  • Discover neighboring devices
  • One-click remote management access to the neighboring ZyXEL devices
  • Reset neighboring devices remotely to factory defaults
  • Power cycle neighboring powered devices (PoE switches only)
This Kit Includes: