TL-ER5120, Gigabit Load Balance Router

Brand: TP-Link

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TP-Link TL-ER5120, Gigabit Load Balance Router

The TL-ER5120 Gigabit Load Balance Broadband Router from TP-LINK possesses excellent data processing capabilities and multiple powerful functions including Load Balance, Access Control, IM/P2P Blocking, DoS Defense, Bandwidth Control, Session Limit and PPPoE Server, which meet the needs of small and medium enterprises, hotels and communities with large volumes of users demanding an efficient and easy-to-manage network with high security.



  • 1 fixed gigabit WAN port, 1 fixed gigabit LAN/DMZ port and 3 freely interchangeable gigabit WAN/LAN ports
  • Abundant security features including ARP Inspection, DoS Defense, URL/Keyword Domain Filter and Access Control
  • Deploys One-Click restriction of IM/P2P applications to easily manage staff online behavior
  • Supports PPPoE Server for the better management of internal network
  • Load Balancing, automatically selects the best route according to the load
  • Professional 4kV lightning protection keeps your investments as safe as possible


Abundant Security Features

For defense against external threats, TL-ER5120 features automatic protection to detect and block Denial of Service (DoS) attacks such as TCP/UDP/ICMP Flooding, TCP Scanning, Ping of Death and other related threats. Moreover, this router offers a hardware DMZ port, which allows network administrators to setup public servers without exposing their internal network, to avoid attacks from external threats. For better management of the internal network, TL-ER5120 allows administrators to set rules to block specific web sites and IM/P2P applications with just one click, and restrict staff to use specific services such as FTP, HTTP and SMTP.


Efficient Access Management

By setting a PPPoE Server to allocate PPPoE accounts to private network users, the router only allows users with legal accounts that have passed authentication to access the Internet. Cooperating with IP-based Bandwidth Control, it is capable of confining bandwidth usage of certain PPPoE accounts. Moreover, the E-Bulletin function is able to release a bulletin in the form of webpage to certain user groups periodically, which notifies the users about the expiration date of the PPPoE account. With the above features, the router will prioritize different users in surfer jurisdictions for more efficient management.

Optimizing Bandwidth Usage

The TL-ER5120 features three freely interchangeable ports that can be set to either LAN or WAN, allowing the router to support up to four WAN ports to satisfy various Internet access requirements through one device. The Intelligent Load Balancing function can distribute data streams according to the bandwidth proportion of every WAN port to raise the utilization rate of multi-line broadband. With IP-based Bandwidth Control and Session Limit functions, network administrators can flexibly manage network bandwidth to optimize bandwidth usage. 

Safety Minded Enterprise Investments

Professional lightning protection technology is designed to prevent electrical surges from penetrating the interior of the device, to be discharged harmlessly into the Earth. This router is designed to prevent lightning damage of up to 4Kv in the well-grounded connection conditions. This feature ensures that networking infrastructure investments remain as safe as possible from one of Mother Nature’s more violent elements.



  Standards and Protocols IEEE 802.3, 802.3u, 802.3ab
  Interface 1 Fixed 10/100/1000Mbps WAN Port
    3 Free Changeable 10/100/1000Mbps WAN/LAN Ports
    1 Fixed 10/100/1000Mbps LAN/DMZ Port
    1 Console Port (RJ-45 On RS232)
  Network Media 10BASE-T: UTP category 3, 4, 5 cable (Max 100m)
    EIA/TIA-568 100Ω STP (Max 100m)
    100BASE-TX: UTP category 5, 5e cable (Max 100m)
    EIA/TIA-568 100Ω STP (Max 100m)
    1000BASE-T: UTP category 5, 5e, 6 cable (Max 100m)
  Button Reset Button
  Power Supply Internal Universal Power Supply
    AC100-240V~ 50/60Hz Input
  Flash  8MB
  LED PWR, SYS, Link/Act, Speed, WAN, DMZ
  Dimensions ( W x D x H ) 17.3x8.7x1.7 in.(440x220x44 mm)
    19-inch Standard Rack-Mount Width, 1U Height
  Concurrent Session 120000
  NAT Throughput 350Mbps
  Basic Function  
  WAN Connection Type Dynamic IP, Static IP, PPPoE, PPTP, L2TP, Dual Access, BigPond
  DHCP DHCP Server/Client
    DHCP Reservation
  MAC Clone Modify WAN/LAN/DMZ MAC Address
  Switch Setting Port Mirror
    Rate Control
    Port Config
    Port VLAN
  IPTV Bridge, Custom
  IPv6 IPv6 Support
  VLAN 802.1Q VLAN, Port VLAN
  Advance Function  
  Load Balance Intelligent Load Balance
    Policy Routing
    Protocol Binding
    Link Backup (Timing, Failover)
    Online Detection
  NAT One-to-One NAT
    Multi-nets NAT
    Virtual Server, DMZ Host, Port Triggering, UPnP
    FTP/H.323/SIP/IPsec/PPTP ALG
  Routing Static Routing
    Dynamic Routing (RIP v1/v2)
  System Mode NAT, Non-NAT, Classical Routing
  Traffic Control IP-based Bandwidth Control
    Guarantee & Limited Bandwidth
    Time-scheduled Policy
    IP-based Session Limit
  Load Balance Intelligent Load Balance
    Link Backup (Timing, Failover)
    Online Detection
  NAT One-to-One NAT
    Multi-nets NAT
    Virtual Server
    Port Triggering
    FTP/H.323/SIP/IPsec/PPTP ALG
  Routing Static Routing
    Policy Routing
  Session Limit IP-based Session Limit
  Bandwidth Control IP-based Bandwidth Control
  DMZ Port 1 Hardware DMZ Port
  Application Control IM, P2P, Web IM, Web SNS, Web Media, Protocol, Proxy Blocking
  Attack Defense TCP/UDP/ICMP Flood Defense
    Block TCP Scan (Stealth FIN/Xmas/Null)
    Block Ping from WAN
  Filtering MAC Filtering
    URL/Keywords Filtering
    Web Content Filtering (Java, ActiveX, Cookies)
  ARP Inspection Sending GARP Packets
    ARP Scanning by WAN/LAN
    IP-MAC Binding
  Access Control Source/Destination IP Based Access Control
  Web Authentication Local User Authentication,
    Radius Sever Authentication,
    Onekey Online
  Service PPPoE Server
    Dynamic DNS (Dyndns, No-IP, Peanuthull, Comexe)
  Maintenance Web/CLI/Telnet Management Interface
    Remote Management
    Export & Import Configuration
    NTP Synchronize
    Syslog Support
  Certification CE, FCC, RoHS
  Package Contents TL-ER5120
    Resource CD
    Power Cord
    Rack-mount Kit
    Installation Guide
  System Requirements Microsoft® Windows® 8, 7,Vista™, XP or MAC® OS, NetWare®, UNIX® or Linux
  Environment Operating Temperature: 0℃~40℃ (32℉~104℉)
    Storage Temperature: -40℃~70℃ (-40℉~158℉)
    Operating Humidity: 10%~90% non-condensing
    Storage Humidity: 5%~90% non-condensing