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Staselog Network Equalizer
Staselog Network Equalizer is a stand-alone bandwidth management tool for professional Ethernet IP networks. It is a superior tool for Internet Service Providers aiming to provide new services to a larger number of subscribers at higher speeds, increased reliability, and lower cost.
Staselog Network Equalizer in operator use
- Eliminate network congestion without need to eliminate P2P traffic
- Solve congestion also in case of encrypted traffic
- Allow network usage constantly to 100%, enabling more customers and data transfer
- Reduce average delay typically by 50% and eliminates jitter
- Improve network usability and subscriber satisfaction
- Protect server memory and network against overload
- Measure and control traffic of thousands of users with high throughput
- Create differentiated services, such as pay-per-usage
- Allows automatization and system integration
- The Bandwidth Management Tool when replacing ATM with IP
Next generation bandwidth management
Staselog's unique technology is superior to the conventional bandwidth management. The approach is to ensure bandwidth to customers and applications, in contrast to the traditional opposite approach, which limits the bandwidth. Staselog utilizes several (10) advanced techniques which enable 100% network loading with high Quality of Service. Below, some of these technical features are presented.
Managing traffic packet by packet is by far more efficient than managing by TCP sessions. In session-based management (item 1 in the figure above), only few samples are taken from the thousands of packets in each session. Thse sample packets are examined and the whole session is then managed according to the result of this examination. Thus, the management resolution is very poor if compared with the resolution obtained by processing each packet individually.
If there is no bandwidth management applied (2) and there are active P2P users downloading and uploading with thousands of parallel TCP sessions, there is hardly any room for other traffic. A fixed bandwidth limit per session will only make the sitation worse. If fair bandwidth share is applied among sessions, there will be no change.
A proper bandwidth management (3) will relief the congestion. The traditional approach (above) is to limit the bandwidth of all users in order to equalize the bandwidth sharing. This will limit the bandwidth of each P2P user and all the others as well. Even though there is some unused bandwidth, the P2P user is not able to use it. Thus the P2P traffic will continue a longer period of time. This will cause longer delays later on when more users appear. Staselog's dynamic approach (below) reallocates the bandwidth packet by packet. Thus, 100% of the bandwidth can be used at all times. If a user or application don't need the allocated bandwidth, it's immediately given to others, including P2P users.
Staselog's policy is to ensure bandwidth to all users and known applications. The amount of bandwidth depends on the subscription type and the application type. Part of the bandwidth is allocated to unidentified traffic. The disturbing and potentially illegal traffic belong to this traffic class. In addition to this, the interactive traffic can get higher priority than file transfer.
Staselog's fair share (Diplomat function) shares bandwidth according to the real needs. It guarantees bandwidth to all users, and it doesn't override the preset connection rate limits. However, it enables Full Rate connection rates if desired.
If there is no congestion, everybody gets exactly the amount of bandwidth as required by the application. Since some applications (P2P) have virtually unlimited bandwidth requirement in file transfer, all available bandwidth will be taken. In this situation, the users with smaller bandwidth request get higher priority than the ones with larger requests. The priority is not associated with user identity, application type, or TCP session. It is only associated with the momentary bandwidth usage of each IP address. Thus P2P and other file transfers will experience constantly (packet by packet) changing connection rate according to the network loading, while the other traffic flows unrestricted.
In asymmetrical networks (ADSL, Cable, etc.) the symmetrical P2P causes congestion even though most of the bandwidth is not in use. The Diplomatic fair share will cause a dramatic improvement. The available bandwidth may increase an order of magnitude for interactive users with small bandwidth requests. Each user group or application group can get their own fair share.
A Staselog Network Equalizer is able to model the network hierarchy and manage the whole network. It is capable of remotely solving bottlenecks and placing bandwidth where it's needed at each time instance. Thus the Full Rate connection can reach each subscriber in a wireless network without overloading the multiple consecutive base stations between the user and the Internet.
Staselog Network Equalizer data sheet [PDF]