UDgateway WAN Optimization

fullgorgedcutNetworking and Communications

Oct 24, 2013 (3 years and 7 months ago)

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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

v2.1

www.UDcast.com
-

UDgateway overview

3

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

v2.1

www.UDcast.com
-

UDgateway overview

4



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

v2.1

www.UDcast.com
-

UDgateway overview

5

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

v2.1

www.UDcast.com
-

UDgateway overview

6

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 compression

File Transfer


first time

File saved to disk

on 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

UDgateway
-
WANcompress
®

UDgateway
-
WANcompress
®

v2.1

Label + Modifications

Full file transferred

Changes

+

Edited file transfer

WANcompress Compression (III)

UDgateway
-
WANcompress
®

UDgateway
-
WANcompress
®

Synchronized

v2.1

10

www.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

v2.1

www.UDcast.com
-

UDgateway WAN optimization

11

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

v2.1

www.UDcast.com
-

UDgateway WAN optimization

12

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

v2.1

13

www.UDcast.com
-

UDgateway WAN optimization

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
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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

v2.1

15

www.UDcast.com
-

UDgateway WAN optimization

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

v2.1

16

www.UDcast.com
-

UDgateway WAN optimization

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

v2.1

17

www.UDcast.com
-

UDgateway WAN optimization

WANcompress reliability


Data on source and destination disks out of
sync


data integrity


Checksums


When in doubt, uncompressed data is sent

v2.1

www.UDcast.com
-

UDgateway WAN optimization

18

Resetting the dictionaries


Reboot


Disable / wait for 10 seconds / enable

v2.1

19

www.UDcast.com
-

UDgateway WAN optimization

v2.1

www.UDcast.com
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UDgateway WAN optimization

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Thank you for your attention