by September 5, 2007 0 comments



Today bandwidth availability is not at all a problem; there is plenty of it
available with your service provider. However, in-spite of so much bandwidth,
managing it still remains the biggest challenge for most CIOs. It’s still
something you can never have enough of. No matter how much bandwidth you buy, it
quickly gets consumed and at the end of the day, you have to again opt for more.
So what’s the reason organizations are always short of bandwidth? There are
several reasons for this, and in this article we will try to bring out those
issues and also discuss some of the trends that are developing in the world of
bandwidth to cope up with them. In addition, we will also identify the hot
technologies that are driving bandwidth usage in organizations.

Today, the primary aim of CIOs is to provide high availability to their
mission critical applications and to ensure maximum uptime for branch office
connectivity. For this, both bandwidth capacity and availability must be
ensured. This is always a challenge due to a number of reasons. The prime
culprit is the increasing number of applications that require WAN connectivity,
especially Internet bandwidth. For instance, in a survey that we conducted in
Feb this year, we asked CIOs about which applications are they currently running
over their WAN infrastructure. A majority of them (more than 50%) were already
using it for running business applications like ERP, CRM, VPN connectivity, file
sharing, and messaging/
collaboration. That’s quite a mouthful, and yet an incomplete list. In the
future, they also plan to deploy video conferencing, online portal for
e-commerce, DR and BCP, and much more. Most of this requires assured bandwidth
because it’s all business critical. Add to this all the non-business critical
traffic, and you’ll be out of bandwidth in no time. So what do you do? How do
you guarantee bandwidth? The easy way out is to procure more bandwidth, and the
difficult way is to manage the existing bandwidth. Which path do you take?
Obviously, it would be the easy way out, but then you can’t continue doing that
indefinitely. The good news is that there are several key developments in this
area that are making even the difficult job of managing bandwidth easy. In this
story, we’ll take a look at some of these trends.

Applications currently
running across the WAN infrastructure
WAN applications planning to
deploy in the near future




Appliances are making bandwidth mgmt a breeze
In the olden days, to assure bandwidth, IT managers had to analyze the
entire network traffic using tools like Ethereal, Ntop, MRTG, etc to identify
bandwidth bottlenecks like improper architecture, faulty or out-dated networking
hardware, etc, which was causing congestion on the network and eating up
bandwidth.

Today, bandwidth management appliances have taken over, which sit on your
Internet gateway and analyze network traffic on a real-time basis. Based on the
kind of traffic, pre-defined management policies are executed to manage
bandwidth, automatically.

These intelligent devices not only manage the bandwidth, but also generate
detailed reports for faulty network hardware. Secondly, these advanced bandwidth
appliances offer load-balancing and failover features, which ensure high
availability to your mission-critical business applications.

Compared to the software-based solutions, these appliances require less
maintenance, take lesser data center space and are are more cost-effective.


WiMAX
It is the
technology behind wireless broadband. It’s based on IEEE 802.16 and operates
in the 2-11 GHz microwave range and promises to deliver shared throughput of
up to 75 Mbps over a long distance. You can access Internet wirelessly. This
technology has the potential to replace the last-mile broadband access such
as DLS.

Use Managed Service Providers
Outsourcing is a key trend that the world is heading towards, and IT is an
area where outsourcing is catching up very fast, even in India. The bandwidth
management can also be outsourced to a managed service provider (MSP). The best
part of this is that now the CIO doesn’t have to worry about bandwidth
management and on behalf of an organization the MSP does it. Once you have
decided to outsource your bandwidth management, you just need to concentrate on
drafting a proper SLA and put penalties for under- or non-performance, on your
organization’s behalf.

These days, you get two bandwidth options from MSPs. You can opt for
dedicated bandwidth or may agree to per-usage bandwidth model. If you are not
sure of the bandwidth requirements of future projects then let the MSP handle
the situation and come up with a customized offering. In this case, MSP may
quote on the basis of your bandwidth usage and offer you a premium bandwidth
pipe. As your applications need more bandwidth, it will automatically be
increased and your application would never face any bandwidth crunch. In
addition, MSPs will offer all bandwidth management features and policies
according to your IT infrastructure. Secondly, MSPs can also offer you
value-added services, where they will manage every bit of Internet bandwidth on
your network and may also help you resolve bottlenecks.


VDSL
Very High
Speed Digital Subscriber Line (VDSL) is the next step after DLS technology,
which uses copper wire to provided broadband. This offers you a never-before
amount of bandwidth up to about 52 Mbps. Compare with a maximum speed of 8
to 10 Mbps in case of ADSL.

Single vs multiple service providers
Even if your ISP is offering you good service today, it can be a risky
proposition not to have a backup. What if there’s a natural calamity or a
manmade one? Or perhaps there’s a disruption on the service provider’s
network-so much for your business continuity. The obvious solution to this is to
have a backup link, which has been the trend for a long time. However, the new
trend these days is to have a single service provider who will give you multiple
redundant paths. For instance, most of the key telecom service providers these
days provide an MPLS backbone, which is over a fiber channel ring. This has
multiple redundant paths, which ensures that if the primary link fails, your
connectivity is not disrupted, and even if the secondary link fails, there’s a
third link that’s still active. The benefit of this is that even the redundant
links can provide the same level of bandwidth, so even your quality of service
isn’t impacted.

On the other side, you could also go for multple service providers. The
choice here depends upon which applications are you running across your WANs,
and whether a single service provider is able to provide you the necessary
banwidth and quality of service required for the job.

What’s the biggest challenge you face with users of your WAN
infrastructure?

Multiple connectivity options are becoming commonplace
The key reason for this trend to take shape is branch office automation.
Increasingly, organizations are enhancing the IT infrastructure of their branch

offices. If you have branch offices spread across the country to the remotest of
areas, then how do you ensure connectivity at each location? There are multiple
technologies available for the job depending upon the location and size of your
branch office, as well as the applications you’re likely to run there. For
instance, if you’ve consolidated your IT infrastructure into your data center,
then branch offices would need to be given remote access to it. If you’re
providing remote application access, then the banwidth requirement would be much
higher. However, if you’ve installed an application server in the local branch
office, then you would just require sufficient bandwidth to synchronize data
with your central application in the data center. Connectivity options are in
abundance today, ranging from MPLS-VPN, to radio towers, to VSATs, to WiMax,
VDSL, and much more. Like we said, connectivity options are not the issue. What
you need to understand very clearly are the applications you plan to run at each
branch office and their bandwidth requirements. For that, their characteristics
must be studied in detail.


IPTV
In Internet
Protocol Television (IPTV) digital TV signals are transmitted over an IP
network. Specifically, it’s an IP network, which is used to
provide a broadband connection to your door step. Now with this technology,
same Internet channels are being used to offer you television channels, as
well.

B/W intensive apps are on the rise
Another trend that’s choking all the bandwidth is an increase in the number
of bandwidth intensive applications. Video conferencing for instance, is
becoming more common, especially in certain sectors. We’ve seen it being
deployed in healthcare for tele-medicine. Likewise, with VoIP coming in, things
move beyond basic voice conversations. They move into multi-point conferences,
collaboration, sharing, etc. Then of course are the applications for DR and BCP,
and web enabled versions of ERP and CRM apps, etc.

WAN accelerators are gaining ground
To combat the new and more bandwidth hungry applications, WAN accelerators
have come to the rescue. They accelerate application performance, increasing WAN
capacity, and enable application prioritization.

They also increase the throughput by recognizing repeated data patterns. They
store repeated data patterns on a hard drive, similar to a cache, and serve the
same to a requestor then and there, instead of getting it from live hosts. This
saves a lot of bandwidth on the WAN links.

Overall, bandwidth is one the most misused service in an organization.
However, you need to control it using a mix of technology and policies. We hope
you’ve found the trends helpful in deciding the right technologies as well as
establishing a set of policies.

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