Comtech HX Series Load Balancing

Overview

With the advent of High Throughput Satellite (HTS) and ever-growing beam capacities, it is now possible to transmit more than a Gigabit per second over a single satellite beam. However, such large throughput may exceed the individual transmit / receive capacity of the ground-based modem equipment. Further complicating the issue is the use of ACM (Adaptive Coding and Modulation) where a link or links are adjusting their MODCODs (Modulation and Coding) in real-time, thereby dynamically changing the link capacity on a per carrier basis.

Solution: HX Series Dynamic Load Balancing

Solving this issue, Comtech now offers the HX product to its portfolio of WAN

Optimization (WANOp) solutions. The HX offers a dynamic traffic load balancing

function either flow or packet based. The HX creates a single virtual Layer 2

connection (“trunk”), grooming together multiple individual links or paths between

two network end-points while ensuring that packets sequencing remain the same.

Such implementation avoids packet re-ordering and enables to operate with parallel

paths of different speed and latency at very high throughput rate. It also enables to

add Comtech’s FX WANOp software function in-line either before or after the load

balancer, between the load balancer and the modem (for example: performing load

balancing between a terrestrial and satellite link with WANOp, or for scalability

purpose).