A Purpose-Built Load Balancer for 10G Networks

A Purpose-Built Load Balancer for 10G Networks

Net Optics xBalancer™ is a load balancing appliance for monitoring high-speed network traffic. It is a cost-effective way to share the increasing traffic load among multiple inline tools. Recording and inspecting all traffic on high-volume 10G networks puts pressure on organizations to either invest heavily in new 10G tools or risk oversubscription. Now, xBalancer enables two or more appliances to be deployed in parallel with traffic balanced between them—a low-cost solution for using IPS, firewall, Web accelerator, and other inline appliances more efficiently and avoiding tool oversubscription that could affect service level agreements. xBalancer further raises the efficiency of inline appliances by sharing a pool of them across multiple independent network links.

The Load Balancing Solution

Net Optics xBalancer is the first appliance that is a purpose-built tool for distributing traffic load to multiple tools. xBalancer’s 24 SFP+ ports and integrated data rate conversion makes it ideal for distribution and load balancing traffic from 10G links to multiple 1G tools. It can also aggregate traffic from multiple 1G and 10G links and distribute it to 1G or 10G tools, leveraging its non-blocking architecture and 480G backplane. With the addition of a monitoring load balancer, multiple 1G tools can share the load to process increasing volumes of traffic at a lower cost than investing in new 10G tools. The CAPEX itself may be lower, and major savings accrue by avoiding the disruption and learning curve of integrating complex new tools into the environment.

Double Your Ports

Using simplex cables you can effectively double your ports to support 48 connections: 24 network inputs and 24 tool outputs.

Flexible Load Balancing

xBalancer offers the flexibility to support many traffic monitoring configurations:

  • In-band (inline) for IPSs, firewalls, and application performance management devices
  • Out-of-band (sniffer) for tools such as traffic recorders and IDSs
  • Multiple independent load balancers
  • Tool sharing, where multiple independent links share the same pool of inline monitoring devices such as IPSs

High Availability

For mission-critical monitoring, xBalancer provides advanced features including link-state awareness and heartbeat monitoring of tool health. When one tool fails, traffic can be automatically distributed to the remaining tools until the failed tool is repaired and returned to service, minimizing loss of monitoring capability in most failure scenarios.

At A Glance

  • Purpose-built tool for load balancing
  • Flow-coherent traffic distribution for multiple inline tools or monitoring tools working in parallel
  • Line-State awareness
  • Heartbeat monitoring of attached tools
  • Supports tool sharing—multiple independent links can share a pool of monitoring devices
  • TapFlow™ multi-layer filtering engine for layer 2-4 filtering
  • Aggregation of input traffic from multiple links
  • Packet slicing
  • VLAN tag management
  • Any-to-any, many-to-many port mapping
  • RMON statistics (packet count, utilization, etc.), All counters can be exported as CSV files
  • Works with external taps, SPAN ports, and bypass switches
  • Any port can be used for monitor or network
  • Twenty-four 1-Gigabit SFP+/ 10-Gigabit
  • Advanced SNMPv3 integrates with all major NMS and Indigo Pro
  • TACACS+/RADIUS support
  • Graphical “Drag & Draw” Filters
  • MPLS label filtering
  • Port rate limiting
  • High Availability (HA)
  • 24 network plus 24 monitor connections possible with simplex cables (RX fiber for network, TX for tool)
  • Intuitive Web UI, SSH access
  • Dual redundant hot-swappable AC or DC power supplies
  • Inline tool load balancing (IPS): Leverages 1G and 10G monitoring tool investments
  • Improves 10G network compliance and security management
  • Relieve oversubscribed tools through load balancing and packet slicing
  • Role Based Access Control Management



Hardware throughput 480 Gbps; no packets dropped as long as monitor traffic does not exceed monitor port bandwidth

Cut Through Architecture


Ultra low latency of 600 to 650 nanoseconds, any packet size, any port to any port, any amount of regeneration and filtering (excluding aggregation head-of-line blocking delays)

Load balancing

Flow coherent, hash-based, 5-tuple (SIP, DIP, SPORT, DPORT, protocol), 2-tuple (SIP+DIP), or other combinations of L2-L4 header fields including SMAC, DMAC, ethertype, and VLAN; out-of-band, inline, tool sharing; 10G-to-1G data rate conversion; link state awareness; Heartbeat monitoring of inline tool health; 1 to 8 independent load balance groups with up to 16 load-balanced outputs per group; Load balancing multicast

Port mapping

Aggregation, any number of ports; regeneration, any number of ports; any-to-any, any-to-many, many-to-any, and manyto-many; any port can be used as an input, an output, or both simultaneously


Filter by IP source address, IP destination address, MAC source address, MAC destination address, source port, destination port, protocol, network port or port group, VLAN

Network Intelligence

Current utilization, total packets, total bytes, CRC errors. More than 100 detailed traffic statistics and counters including RMON, All counters can be exported as CSV files

Packet slicing

Truncate size is configurable by the user


Server allows authentication of users from external AAA servers using either RADIUS or TACACS+ protocols

Device management

Web UI, Serial console, SSH, SNMPv3, SNMPv2, SNMPv1, Remote software upgrades, Back up and restore configuration, Role Based Access Control Management



Operating Temperature: 0˚C to 40˚C
Storage Temperature: -10˚C to 70˚C
Relative Humidity: 10% min, 95% max, non-condensing


Dimensions: 1.75” high x 19.7” deep x 19.0” wide
Mounting: Surface or 19” rack mount (1U)
Weight: 13.5 lbs


Fiber Optic Interfaces: (24) SFP/SFP+
Management Port: (1) RJ45 10/100/1000 Copper
Configuration (CLI) Port: (1) Cisco DB9 to RJ45
DC Receptacle: Terminal peak, 12-14 gauge wire

Hot-swappable modules

Power: (2) AC universal or (2) -48VDC, redundant
Fans: (4) hot-swappable modules

Electrical interface

AC Input: 100-240VAC, 5.29-2.2A, 50/60Hz
DC Input: -40VDC nominal -40 to -72VDC, 13.9A


(All ports) Link LEDs
(All ports) Activity LEDs
(2) Power LEDs


Safety: MET, CE
Environmental: RoHS, WEEE
Protocol: Fully IEEE 802.3 compliant

Part Number
XF-2XB xBalancer 24 SFP+ Ports
XF-2XB-DC xBalancer 24 SFP+ Ports, -48VDC
XF-2PWRAC 1 AC power supply module
XF-2PWRDC 1 DC power supply module
XF-2FAN 1 Replacement fan module

SFP+ or SFP modules are required for operation and are sold separately.

SFP+ kits – 10 Gbps
SFP+KT-SR 10G Fiber SR SFP+ Transceiver
SFP+KT-50SR 10G Fiber SR 50µm SFP+ Transceiver
SFP+KT-LR 10G Fiber LR SFP+ Transceiver
SFP kits – 1 Gbps
SFPKT-SX 1G Fiber SX SFP Transceiver
SFPKT-50SX 1G Fiber SX 50µm SFP Transceiver
SFPKT-LX 1G Fiber LX SFP Transceiver
SFPKT-GCU 1G Copper SFP Transceiver
SFPKT-CU3* 10/100/1000 Copper SFP Transceiver

All SFP+ and SFP kits include a 3-meter cable.
* The SFPKT-CU3 transceiver may be used in this device but requires that the remote device be set to “auto-negotiation off/ disable” and speed set to 1Gig (1000 Mbps) with full duplex.


All products include a 1 year manufacturer’s warranty. Service plans offering additional years of coverage including an advanced replacement option are available.