20
disaster recovery plan. With a The IT team decided to take a tests over a several week
thin-client architecture, we did comprehensive look at what period. We evaluated these
not have to worry about we determined were the products on a primary WAN
1-2-1
backing up remote offices. But leading WAN optimisation connection between our Hong
we wanted to ensure that all vendors at the time, which Kong and UK data centers.
data centers where protected initially led us to products Then, they went to a live
in near real-time, with failover from Cisco, Riverbed, Silver test in our Bangkok office,
capabilities between them. We Peak Systems, Blue Coat, and which has more than 30
had some of the most Citrix. Because we were using attorneys.
sophisticated tools in the Packeteer for traffic shaping on
T
industry to achieve this our VoIP traffic, we decided to While both Riverbed and Silver
objective, such as EMC’s SRDF see if they too could meet our Peak Systems performed well
application. These tools broader WAN optimisation on a variety of different
required dedicated and cost requirements, of course, this applications, the real
network lines to support the was before Packeteer was difference came down to the
VID BENNET
replication. acquired by Blue Coat. Citrix application. Silver Peak
DA
optimizes this traffic while
Our assessment: We were quickly able to pare Riverbed did not. Silver Peak
How we prepared down this list when we could has an enormous impact on
Linklaters took a long hard not get Cisco and Citrix to Citrix’s reliability across the
look at all of our applications work in our evaluation WAN, in addition, once we
to determine how best to scenario. Bluecoat and turned off compression and
overcome our scalability and Packeteer were also eliminated encryption on our Citrix
performance challenges. We since both lacked performing servers, Silver Peak was able
acknowledged that there was a disk-based deduplication for to dedupe our Citrix traffic.
need for more bandwidth, but Citrix, which we thought was Its performance with Citrix was
the upgrade process had to critical given the repetitive a pleasant surprise to us as
be better controlled. At the nature of our WAN traffic. Our other WAN optimisation
same time, we recognised employees send thousands of vendors told us they could not
that more bandwidth would versions of the same dedupe Citrix traffic due to its
not solve all of our problems documents back and forth, low latency requirements.
and is extremely costly. much of which is identical. We With Silver Peak, we are seeing
Network quality, not therefore quickly established 7GB Citrix sessions reduced to
bandwidth, is the main that deduplication would have 3GB on the WAN, which is an
reason why our VoIP and a significant reduction in our average reduction of 56
Citrix traffic was not living up WAN bandwidth. percent.
to our expectations. We
quickly came to the conclusion That left Riverbed and Silver Why Silverpeak?
that we needed WAN Peak Systems, which we Linklaters believes that Silver
optimisation. moved into live production Peak’s products and roadmap
The IT team decided to take a
comprehensive look at what we determined
were the leading WAN optimisation vendors
at the time, which initially led us to products
MAR/APR 09 WWW.SNS-UK.CO.UK
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