udgateway wan optimization. 1. why udgateway? all-in-one solution value added services –...

UDgateway WAN Optimization

1. Why UDgateway?

• All-in-one solution• Value added services

– Networking project requirements

• Optimize IP traffic on constrained links– Enhance user experience– Save bandwidth

v2.1 www.UDcast.com - UDgateway overview 2

WAN optimization

• Acceleration– Improve end-user experience– Use bandwidth efficiently and effectively

• Security– Control network access– Block unwanted traffic


WAN optimization (cont.)

• QoS– Control bandwidth usage– Ensure fair bandwidth sharing– Prioritize business critical traffic

• Compression– Use bandwidth efficiently and effectively– Eliminate redundant traffic– Get extra bandwidth for free


File download compression

• Download time reduction: up to -97%– 3 seconds instead of 1min40s

• Volume reduction: up to -97%– 3 MB instead of 100 MB

• Bandwidth efficiency: up to x24– 24 Mbit/s for the price of 1 Mbit/s


Link Management

• Benefit from multiple WAN links– High-availability– Least Cost Routing– Adapt routing strategy to

• Applications• Users

– More links means more bandwidth– Differentiate forward / return links– Multi-ISP links


4. WANcompress

• Purpose: Save bandwidth by eliminating redundancy from network streams

• Example:– Send e-mail with large attachment– Make some changes– Send again Only the changes are sent

• More than 20x acceleration on repetition of same data

v2.1 www.UDcast.com - UDgateway WAN optimization 7

WAN

On the fly compressionFile Transfer – first time

File saved to diskon both ends

Full file transferred

WANcompress Compression (I)

UDgateway-WANcompress® UDgateway-WANcompress®

v2.1

WANcompress Compression (II)

WAN

Only label reference

Synchronized

File Transfer – second time Full file transferred


v2.1

Label + ModificationsFull file transferred

Changes+

Edited file transferWANcompress Compression (III)


Synchronized

v2.1 10www.UDcast.com - UDgateway WAN optimization

Benefits for Service providers

• Get more out of expensive links:– Satellite, WiMAX, Microwave, etc.

• Put more customers on same infrastructure


Benefits for end-users

• Get more out of slow or expensive links– GPRS/UMTS, Inmarsat, VSAT, WiMAX, etc.

• Avoid upgrading link• Reduce volume-based charges• Avoid Fair Access Policy penalty


WANcompress operation

• TCP stream level– Independent of file structure

• WANcompress does not even know what a “file” is

– Independent of delivery method• Mail attachment, ftp, web download

• Unencrypted traffic– Before VPN encryption


WANcompress operation (cont.)

• Traffic redundancy– Data protocol headers– Non-cacheable Web objects

• “nocache” tag, scripts, dynamic pages (PHP, JSP, ASP…)

– Collaborative workplace– Software updates

• Antivirus• Windows, Adobe, Firefox, Apple…

• “The bigger, the better”v2.1 www.UDcast.com - UDgateway WAN optimization 14

WANcompress operation (cont.)

• Dictionary-based compression:– Compression dictionary

• Transmitted streams labels

– Decompression dictionary• Received streams labels

• Transparent to both communicating parties– Fully interoperable with all TCP applications– Lossless compression


WANcompress vs. IPcomp

• Compression scope– IPcomp

• Only fractions of seconds in traffic history• 8 KB block default• 1.5 KB in practice

– WANcompress• Up to days or weeks of traffic history • On-disk dictionary : tens of Gigabytes• 10 Gigabytes 10 days of traffic at 100 kbit/s average


WANcompress security

• TCP streams are stored on source and destination confidentiality – Data streams may be encrypted on disk– Only UDgateway that has stored it can decrypt it– Decryption key is destroyed by power-off

• Exists only in RAM


WANcompress reliability

• Data on source and destination disks out of sync data integrity– Checksums– When in doubt, uncompressed data is sent


Resetting the dictionaries

• Reboot• Disable / wait for 10 seconds / enable



Thank you for your attention

udgateway wan optimization. 1. why udgateway? all-in-one solution value added services –...

Documents

udgateway overview3

udgateway overview4

udgateway overview2

udgateway overview5

udgateway overview6

udgatewaywancompress

wan optimization acceleration

wancompress purpose