Allied Telesis SwitchBlade AT-SB4008 Додатковий посібник - Сторінка 4
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"Solid as Granite" continued
"It was a pretty simple solution, in the end, " says Patterson, "They
knew what they wanted to accomplish, so all we had to do was
match them up with the right equipment. We also wanted to
make sure they had some room for growth, and – because their
systems are really critical to their operation – we wanted to add
redundancy to make sure they stay available. "
They decided on the Allied Telesis AT-SB4000 series of products,
often known as SwitchBlade, which had the right combination of
wirespeed performance, port-density and redundancy features.
The 210 King County SWD workstations and dozen file servers,
which had previously been connected by a web of twelve
different hubs, would now be consolidated on one AT-SB4008
multi-layer switch. By centralizing the system at one core
connection point, they would simplify trouble-shooting, reduce
maintenance, and could more economically add the network
redundancy features they wanted.
Moreover, this design would free up that original networking hard-
ware for transport to the Cedar Hills facility and the remote
transfer stations – where they would be a better fit.Those remote
sites all link back to the main office over a Regional Optical
Network.
The AT-SB4008 chassis has eight slots for line cards, or "blades. "
Willis and Patterson decided to fully configure the chassis, choos-
ing five 10/100TX 48-port copper blades for the workgroups
along with two 8-port SC Gigabit fiber blades and an 8-port
Gigabit copper blade to connect their file servers.
"They've got 210 workstations and a dozen servers connected
right now, " says Keith Hanna, "but there's room for 30 more
workstations and eleven more servers.
Plus, the SwitchBlade system is modular, so if they need to add
more capacity down the line, they can easily do that, and still keep
this centralized architecture. "
They also configured the chassis with three redundant power sup-
ply modules and a redundant Switch Controller management
card, to ensure that the system will maintain maximum availability,
and recover quickly from outages.
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Allied Telesis Case Study: King County Solid Waste
What about performance? The original network, Patterson
explains, was crippled by a daisy-chained architecture. "They were
only getting about 2.4 Gig per box on that network, " he says. "By
the time you got to the last one, the system was running up to 8
Gig of traffic – which is seriously oversubscribed.The Switchblade
will give them 100% throughput for every port on the network. "
The change-out itself went off without a hitch. Willis and his team
had the installation completed and the network back up and run-
ning inside of an hour.The Cedar Hills facility has seen a tenfold
increase in their performance, and the rest of the equipment will
be rolled out as the remote transfer stations are ready for them.
Ken Willis and his team are very pleased with their new network.
"It's been as solid as a piece of granite, " he says. "It's been terrific.
You know, when I first brought Allied Telesis in, there were
definitely nay-sayers, some people wanted to stick with the status
quo and really doubted my assessment of the performance
increase we could see. But when we fired that baby up and they
saw the performance for themselves... We'll, let's just say, there
are a few more believers here. "
Solution Design: Less is more
In this network revamp, the SWD main office systems were
streamlined into one modular AT-SB4008 Layer 3 switch chassis.
With its 8-slot configuration, the "SwitchBlade" AT-SB4008
was able to replace the twelve hubs previously employed. In
addition to improved speed and capacity, the AT-SB4008 also
adds intelligent network management, increased security
functions such as firewall and user authentication, hot-swappable
components, and power & intelligence redundancy to ensure
continuous availability for mission critical systems.
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