Liad OfekVice President, Technical Services

Expand Networks

Clearing the Way for VoIP in the Branch

What’s the Hidden Cost? The promise and the reality of VoIP VoIP challenges in the Branch Office The Expand Compass Solution for VoIP

deployments

Conflicting Commercial & User Requirements

Remote UserRemote User

Remote UserRemote User

Remote UserRemote User

80% of 80% of Users Users are are

RemoteRemote!!

80% of 80% of Users Users are are

RemoteRemote!!

87% of 87% of Users Users are are

RemoteRemote!!

Corporate HQCorporate HQ

San Francisco Remote User annoyedannoyed

Poor response time

London Remote User frustratedfrustrated

High support costs

Tokyo Remote Usergives upgives up

Lack of productivity

HQ Cost-reduction Simplicity Consolidation Business Continuity Regulatory Compliance

REMOTE Globalization Productivity

The Promise of Voice/Video and Data Convergence

Reduces cost Simplifies management Provides enhanced features Delivers greater mobility for the distributed business Provides same quality as PSTN calls Converged Voice, Data, Video – unified infrastructure for

feature-rich applications Convergence made easy and even more cost-effective with

MPLS (Multi-protocol packet switching)

Voice/Video Over IP are here to stay…BUT...

The Reality The WAN limits the success of Convergence

Low speed links for remote sites – 128kbps, 512kbps, T1’s/E1’s Low visibility for existing application bandwidth consumption

Performance challenges Unacceptable voice quality Greedy and bursty competing applications MPLS access points are still congested…QoS is not enough

More data is thrown over the WAN Server consolidation Web services Disaster recovery

Voice is not the only business critical application Other data applications can’t be degraded to improve voice quality

More Applications Deployed To The Branch

WAN

10010101

10110100

10100101

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______

______

______

______

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87% of employees work from the branch (Nemertes, 2004)

New applications Email Internet / Intranet VoIP

Same WAN Frame Relay Leased lines IP VPN MPLS

Insufficient Capacity and Burst

Remote Branch Challenges

Latency and Chatty Applications

Insufficient Capacity and Burst

Remote Branch Challenges

Intermittent Connectivity and Packet Loss

Latency and Chatty Applications

Insufficient Capacity and Burst

Remote Branch Challenges

Congestion and Greedy Applications

Intermittent Connectivity and Packet Loss

Latency and Chatty Applications

Insufficient Capacity and Burst

Remote Branch Challenges

The Complete Technology Solution

for VoIP

WAN Optimization

Compression - reduce data over the WAN: free up the WAN capacity for Voice WAN Compression Gigabyte Caching

Best-of-breed WAN Compression

Patented algorithms

Byte-level caching Packet header

reduction Adaptive packet

compression Fully transparent

WAN

Next-Generation WAN Compression

When data repeats, content is delivered from the edge

The “bandwidth effect”

WAN

WAN Throughput Improvements

Increase WAN capacity Benefits all applications Transparent to WAN,

applications, servers and users

Alternative to WAN upgradeswith a 3 – 9 month ROI

We have literally been able

to trick our 56Kbps lines into

behaving like T1s– Julie Williams, VP & Compliance

Officer

First National Bank Iowa

Microsoft Exchange

0%

Lotus Notes

SAP

NetBIOS

Intranet

Web

XML

Disaster Recovery

Citrix

200% 400% 600% 800% 1000% 1200%

0% 2X 4X 6X 8X 10X 12X

Typical

Improvements

Peak

Improvements

Additional WAN capacity

WAN Optimization

QoS - Guarantee voice quality Shaping Traffic priority MPLS tagging Policy scheduling Bandwidth limitation

QoS - Gain Application Control

Prioritize and control apps Guaranteed, min/max bandwidth for key

applications Control/block rogue applications Seamless integration with other

optimization services

We were able to

configure VoIP QoS with

a simple configuration at

30% less than the Telco

cost–Jacob Nielsen, Network

Administrator Brenntag Nordic

Acceleration

Optimize all applications to improve application response time

Application Acceleration Voice Optimization

(Fragmentation) HTTP Acceleration FTP Acceleration DNS Acceleration HTTPS Acceleration Citrix Acceleration

Protocol Acceleration TCP Acceleration SCPS Reliability

H

How Does Voice Optimization Work ?

If applications sharing a low bandwidth link include FTP and VoIP, small VoIP packets may be delayed

Fragmentation will sub-divide the large packets and insert the small Reassembly performed at remote Accelerator Applied only to QoS default and low priority queues

H

H

H

H

H

H

H

H

H

Visibility & Management

Visibility for VoIP performance ExpandView

Central Management Inventory & License

Management Global Visibility Ease of Deployment

Application & Network Visibility

Automatic Application Discovery

NetFlow SLA Management

Visibility Into Application Performance

Visibility for World-class NOCs Network, application & performance

statistics Application performance and alerting Network trending and analysis

…more impressive were the

monitoring capabilities that

offered in-depth visibility &

enabled us to tune the

performance of Microsoft

Office–Ovvyng Harewood, IT Director for the

Ministry of Finance, Gov of Barbados

Security

Encryption IP Sec Tunneling 3 DES

AAA Authentication Authorization Accounting RADIUS TACACS+

WAFS (Wide Area File Services)Will VoIP be affected by server

consolidation ? Terminate CIFS protocol

locally (proxy) to eliminate “chattiness” over the WAN

Cache the objects to provide LAN-like performance

Consolidate other RBO services to provide LAN performance (print, DNS, DHCP, Etc.)

How Does WAFS Work?

Summary

Merging voice and data networks can cause significant problems which can offset the financial benefits of VoIP if not addressed properly

Technologies like compression, QoS, protocol and application acceleration, and monitoring are essential to establishing VoIP as an integral application for the branch