SDN (Software-Defined Networking) 47
machines, obviously without causing a degradation in performance.
The other physical machines are placed on standby to save energy. In
the networks, this involves sending the streams along common paths,
rather than dispersing them in the infrastructure network.
The SDN market is fairly difficult to predict, because whilst
demand is high, so too are the costs involved in making the move to
this new architecture. These high costs are due to novelty and to the
difficulty in integrating SDN into the existing networks. In particular,
operators who possess a significant physical infrastructure are
wondering about the integration of SDN: how can it be introduced
without an additional costly structure? Indeed, it is not an option to
demolish everything and rebuild from scratch in this new context.
Therefore, we need to introduce SDN in specific environments such as
the renovation of a part of the network, or the construction of a new
localized infrastructure.
Figure 2.26 gives an indication of what the SDN market could be
in coming years. In this figure, we can see that there is a good
distribution between service providers, the companies offering
datacenter services, Cloud providers and, to a lesser extent, the
companies’ access networks.
Finally, if we look at the manufacturers’ vision, we see two
avenues, that are represented by VMware and CISCO: softwareorientation and hardware-orientation. The software-oriented vision is
installed on the physical machines of practically all manufacturers,
whilst hardware-orientation is greatly favorable for manufacturers –
especially well-established ones.
Although SDN is essentially intended for core networks today,
there is a strong chance that it will become widely used on the
periphery and that SDN will prove to be the right solution for
controlling all peripheral devices. In particular, OpenFlow Wi-Fi
access points are coming onto the market, and are likely to make their
presence felt fairly quickly, with SDN following on in their wake.
This is what we shall look at in Chapter 3: smart edges.
www.it-ebooks.info
machines, obviously without causing a degradation in performance.
The other physical machines are placed on standby to save energy. In
the networks, this involves sending the streams along common paths,
rather than dispersing them in the infrastructure network.
The SDN market is fairly difficult to predict, because whilst
demand is high, so too are the costs involved in making the move to
this new architecture. These high costs are due to novelty and to the
difficulty in integrating SDN into the existing networks. In particular,
operators who possess a significant physical infrastructure are
wondering about the integration of SDN: how can it be introduced
without an additional costly structure? Indeed, it is not an option to
demolish everything and rebuild from scratch in this new context.
Therefore, we need to introduce SDN in specific environments such as
the renovation of a part of the network, or the construction of a new
localized infrastructure.
Figure 2.26 gives an indication of what the SDN market could be
in coming years. In this figure, we can see that there is a good
distribution between service providers, the companies offering
datacenter services, Cloud providers and, to a lesser extent, the
companies’ access networks.
Finally, if we look at the manufacturers’ vision, we see two
avenues, that are represented by VMware and CISCO: softwareorientation and hardware-orientation. The software-oriented vision is
installed on the physical machines of practically all manufacturers,
whilst hardware-orientation is greatly favorable for manufacturers –
especially well-established ones.
Although SDN is essentially intended for core networks today,
there is a strong chance that it will become widely used on the
periphery and that SDN will prove to be the right solution for
controlling all peripheral devices. In particular, OpenFlow Wi-Fi
access points are coming onto the market, and are likely to make their
presence felt fairly quickly, with SDN following on in their wake.
This is what we shall look at in Chapter 3: smart edges.
www.it-ebooks.info